CVE-2021-46981
NoneCVSS
—
EPSS
0.3%
Published
Feb 28, 2024
CISA due date
—
Cloudanix analysis
A flaw in Linux storage handling can cause the whole system to crash when certain network disk operations are performed in the wrong order.
- Exploitation
- Local Privilege
- Attacker needs
- Local User
- Complexity
- Low
- Impact
- Denial Of Service
- Component
- OS kernel
- Class
- Memory Corruption
- Remediation
- Patch
- Effort
- Low
- Patch risk
- Low
What it actually does
NULL pointer dereference in nbd_disconnect_and_put when recv_workq is null during flush_workqueue after device open and disconnect sequence bypasses config_refs protection
Why it matters to the business
Local denial of service via kernel panic on systems exposing network block devices, requiring reboots and potentially disrupting storage-dependent workloads with moderate operational impact due to low exploitability
How an attack unfolds
An attacker with local access opens /dev/nbdX to increment config_refs while leaving internal pointers null, then issues a disconnect via netlink genl interface which calls nbd_disconnect_and_put without the missing recv_workq guard, dereferencing null during mutex acquisition in workqueue flush
How to fix it
Apply upstream kernel patch adding if (nbd->recv_workq) guard in nbd_disconnect_and_put before flush; update to a kernel release containing the fix for CVE-2021-46981
How to confirm the fix worked
Verify presence of conditional check before flush_workqueue call in nbd_disconnect_and_put function; reproduce open-disconnect sequence in test environment and confirm absence of oops
Typical attack path
- Obtain local unprivileged access on Linux host
- Open /dev/nbdX device file to set config_refs
- Issue nbd_genl_disconnect netlink message
- Trigger flush_workqueue on null recv_workq pointer
- Cause kernel NULL dereference and panic
How to detect it
Search kernel logs for oops traces containing nbd-client, flush_workqueue, nbd_disconnect_and_put, and NULL pointer dereference at mutex_lock; correlate with netlink sendmsg activity to genl nbd family
- BUG: kernel NULL pointer dereference.*nbd
- nbd-client.*flush_workqueue
- nbd_disconnect_and_put+0x81
- mutex_lock.*recv_workq
- genl_family_rcv_msg_doit.*nbd
What your security team should do
- Prioritize kernel updates on systems using nbd module
- Restrict local access to nbd device nodes via permissions
- Monitor for kernel oops involving nbd and workqueue
- Audit nbd usage in production workloads for necessity
The record
In the Linux kernel, the following vulnerability has been resolved: nbd: Fix NULL pointer in flush_workqueue Open /dev/nbdX first, the config_refs will be 1 and the pointers in nbd_device are still null. Disconnect /dev/nbdX, then reference a null recv_workq. The protection by config_refs in nbd_genl_disconnect is useless. [ 656.366194] BUG: kernel NULL pointer dereference, address: 0000000000000020 [ 656.368943] #PF: supervisor write access in kernel mode [ 656.369844] #PF: error_code(0x0002) - not-present page [ 656.370717] PGD 10cc87067 P4D 10cc87067 PUD 1074b4067 PMD 0 [ 656.371693] Oops: 0002 [#1] SMP [ 656.372242] CPU: 5 PID: 7977 Comm: nbd-client Not tainted 5.11.0-rc5-00040-g76c057c84d28 #1 [ 656.373661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ 656.375904] RIP: 0010:mutex_lock+0x29/0x60 [ 656.376627] Code: 00 0f 1f 44 00 00 55 48 89 fd 48 83 05 6f d7 fe 08 01 e8 7a c3 ff ff 48 83 05 6a d7 fe 08 01 31 c0 65 48 8b 14 25 00 6d 01 00 <f0> 48 0f b1 55 d [ 656.378934] RSP: 0018:ffffc900005eb9b0 EFLAGS: 00010246 [ 656.379350] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 656.379915] RDX: ffff888104cf2600 RSI: ffffffffaae8f452 RDI: 0000000000000020 [ 656.380473] RBP: 0000000000000020 R08: 0000000000000000 R09: ffff88813bd6b318 [ 656.381039] R10: 00000000000000c7 R11: fefefefefefefeff R12: ffff888102710b40 [ 656.381599] R13: ffffc900005eb9e0 R14: ffffffffb2930680 R15: ffff88810770ef00 [ 656.382166] FS: 00007fdf117ebb40(0000) GS:ffff88813bd40000(0000) knlGS:0000000000000000 [ 656.382806] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 656.383261] CR2: 0000000000000020 CR3: 0000000100c84000 CR4: 00000000000006e0 [ 656.383819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 656.384370] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 656.384927] Call Trace: [ 656.385111] flush_workqueue+0x92/0x6c0 [ 656.385395] nbd_disconnect_and_put+0x81/0xd0 [ 656.385716] nbd_genl_disconnect+0x125/0x2a0 [ 656.386034] genl_family_rcv_msg_doit.isra.0+0x102/0x1b0 [ 656.386422] genl_rcv_msg+0xfc/0x2b0 [ 656.386685] ? nbd_ioctl+0x490/0x490 [ 656.386954] ? genl_family_rcv_msg_doit.isra.0+0x1b0/0x1b0 [ 656.387354] netlink_rcv_skb+0x62/0x180 [ 656.387638] genl_rcv+0x34/0x60 [ 656.387874] netlink_unicast+0x26d/0x590 [ 656.388162] netlink_sendmsg+0x398/0x6c0 [ 656.388451] ? netlink_rcv_skb+0x180/0x180 [ 656.388750] ____sys_sendmsg+0x1da/0x320 [ 656.389038] ? ____sys_recvmsg+0x130/0x220 [ 656.389334] ___sys_sendmsg+0x8e/0xf0 [ 656.389605] ? ___sys_recvmsg+0xa2/0xf0 [ 656.389889] ? handle_mm_fault+0x1671/0x21d0 [ 656.390201] __sys_sendmsg+0x6d/0xe0 [ 656.390464] __x64_sys_sendmsg+0x23/0x30 [ 656.390751] do_syscall_64+0x45/0x70 [ 656.391017] entry_SYSCALL_64_after_hwframe+0x44/0xa9 To fix it, just add if (nbd->recv_workq) to nbd_disconnect_and_put().
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Debian:11 | linux | 0 | 5.10.38-1 |
| Debian:12 | linux | 0 | 5.10.38-1 |
| Debian:13 | linux | 0 | 5.10.38-1 |
| SUSE:Enterprise Storage 7.1 | kernel-64kb | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Enterprise Storage 7.1 | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Enterprise Storage 7.1 | kernel-default-base | 0 | 5.3.18-150300.59.158.1.150300.18.92.5 |
| SUSE:Enterprise Storage 7.1 | kernel-docs | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Enterprise Storage 7.1 | kernel-obs-build | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Enterprise Storage 7.1 | kernel-preempt | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Enterprise Storage 7.1 | kernel-source | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Enterprise Storage 7.1 | kernel-syms | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Availability Extension 12 SP5 | kernel-default | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise High Availability Extension 15 SP2 | kernel-default | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise High Availability Extension 15 SP3 | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-default | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-default-base | 0 | 5.3.18-150200.24.188.1.150200.9.95.3 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-docs | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-obs-build | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-preempt | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-source | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-syms | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-64kb | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default-base | 0 | 5.3.18-150300.59.158.1.150300.18.92.5 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-docs | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-obs-build | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-preempt | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-source | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-syms | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kernel-default | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_56 | 0 | 1-8.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP2 | kernel-default | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_47 | 0 | 1-150200.5.3.3 |
| SUSE:Linux Enterprise Live Patching 15 SP3 | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_43 | 0 | 1-150300.7.3.5 |
| SUSE:Linux Enterprise Micro 5.1 | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Micro 5.1 | kernel-default-base | 0 | 5.3.18-150300.59.158.1.150300.18.92.5 |
| SUSE:Linux Enterprise Micro 5.1 | kernel-rt | 0 | 5.3.18-150300.166.1 |
| SUSE:Linux Enterprise Micro 5.1 | kernel-source-rt | 0 | 5.3.18-150300.166.1 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-default-base | 0 | 5.3.18-150300.59.158.1.150300.18.92.5 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-rt | 0 | 5.3.18-150300.166.1 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-source-rt | 0 | 5.3.18-150300.166.1 |
| SUSE:Linux Enterprise Real Time 12 SP5 | kernel-rt | 0 | 4.12.14-10.182.1 |
| SUSE:Linux Enterprise Real Time 12 SP5 | kernel-rt_debug | 0 | 4.12.14-10.182.1 |
| SUSE:Linux Enterprise Real Time 12 SP5 | kernel-source-rt | 0 | 4.12.14-10.182.1 |
| SUSE:Linux Enterprise Real Time 12 SP5 | kernel-syms-rt | 0 | 4.12.14-10.182.1 |
| SUSE:Linux Enterprise Server 12 SP5 | kernel-azure | 0 | 4.12.14-16.182.1 |
| SUSE:Linux Enterprise Server 12 SP5 | kernel-default | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Server 12 SP5 | kernel-source | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Server 12 SP5 | kernel-source-azure | 0 | 4.12.14-16.182.1 |
| SUSE:Linux Enterprise Server 12 SP5 | kernel-syms | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Server 12 SP5 | kernel-syms-azure | 0 | 4.12.14-16.182.1 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | kernel-default | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | kernel-default-base | 0 | 5.3.18-150200.24.188.1.150200.9.95.3 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | kernel-docs | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | kernel-obs-build | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | kernel-preempt | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | kernel-source | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server 15 SP2-LTSS | kernel-syms | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-64kb | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-default-base | 0 | 5.3.18-150300.59.158.1.150300.18.92.5 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-docs | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-obs-build | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-preempt | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-source | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-syms | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server 15 SP3-LTSS | kernel-zfcpdump | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | kernel-azure | 0 | 4.12.14-16.182.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | kernel-default | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | kernel-source | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | kernel-source-azure | 0 | 4.12.14-16.182.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | kernel-syms | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | kernel-syms-azure | 0 | 4.12.14-16.182.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | kernel-default | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | kernel-default-base | 0 | 5.3.18-150200.24.188.1.150200.9.95.3 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | kernel-docs | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | kernel-obs-build | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | kernel-preempt | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | kernel-source | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | kernel-syms | 0 | 5.3.18-150200.24.188.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | kernel-default | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | kernel-default-base | 0 | 5.3.18-150300.59.158.1.150300.18.92.5 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | kernel-docs | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | kernel-obs-build | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | kernel-preempt | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | kernel-source | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | kernel-syms | 0 | 5.3.18-150300.59.158.1 |
| SUSE:Linux Enterprise Software Development Kit 12 SP5 | kernel-docs | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Software Development Kit 12 SP5 | kernel-obs-build | 0 | 4.12.14-122.216.1 |
| SUSE:Linux Enterprise Workstation Extension 12 SP5 | kernel-default | 0 | 4.12.14-122.216.1 |
| Ubuntu:14.04:LTS | linux | 0 | 3.11.0-12.19 |
| Ubuntu:14.04:LTS | linux-aws | 0 | 4.4.0-1002.2 |
| Ubuntu:14.04:LTS | linux-azure | 0 | 4.15.0-1023.24~14.04.1 |
| Ubuntu:14.04:LTS | linux-lts-xenial | 0 | 4.4.0-13.29~14.04.1 |
| Ubuntu:16.04:LTS | linux | 0 | 4.4.0-2.16 |
| Ubuntu:16.04:LTS | linux-aws | 0 | 4.4.0-1001.10 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 0 | No fix |
| Ubuntu:16.04:LTS | linux-kvm | 0 | 4.4.0-1004.9 |
| Ubuntu:18.04:LTS | linux-aws-5.0 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-aws-5.3 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-aws-5.4 | 0 | 5.4.0-1054.57~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure | 0 | No fix |
| Ubuntu:18.04:LTS | linux-azure-5.3 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-azure-5.4 | 0 | 5.4.0-1055.57~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure-edge | 0 | No fix |
| Ubuntu:18.04:LTS | linux-gcp | 0 | No fix |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-gcp-5.4 | 0 | 5.4.0-1049.53~18.04.1 |
| Ubuntu:18.04:LTS | linux-gke-4.15 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-gke-5.4 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-gkeop-5.4 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-hwe | 0 | No fix |
| Ubuntu:18.04:LTS | linux-hwe-5.4 | 0 | 5.4.0-80.90~18.04.1 |
| Ubuntu:18.04:LTS | linux-hwe-edge | 0 | No fix |
| Ubuntu:18.04:LTS | linux-ibm-5.4 | 0 | 5.4.0-1010.11~18.04.2 |
| Ubuntu:18.04:LTS | linux-oem | 0 | No fix |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-oracle-5.3 | 0 | No fix |
| Ubuntu:18.04:LTS | linux-oracle-5.4 | 0 | 5.4.0-1052.56~18.04.1 |
| Ubuntu:18.04:LTS | linux-raspi-5.4 | 0 | 5.4.0-1041.45~18.04.1 |
| Ubuntu:20.04:LTS | linux | 0 | 5.4.0-80.90 |
| Ubuntu:20.04:LTS | linux-aws | 0 | 5.4.0-1054.57 |
| Ubuntu:20.04:LTS | linux-aws-5.11 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-aws-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-aws-5.15 | 0 | 5.15.0-1014.18~20.04.1 |
| Ubuntu:20.04:LTS | linux-aws-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-azure | 0 | 5.4.0-1055.57 |
| Ubuntu:20.04:LTS | linux-azure-5.11 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-azure-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-azure-5.15 | 0 | 5.15.0-1007.8~20.04.1 |
| Ubuntu:20.04:LTS | linux-azure-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-azure-fde | 0 | No fix |
| Ubuntu:20.04:LTS | linux-azure-fde-5.15 | 0 | 5.15.0-1019.24~20.04.1.1 |
| Ubuntu:20.04:LTS | linux-bluefield | 0 | 5.4.0-1016.19 |
| Ubuntu:20.04:LTS | linux-gcp | 0 | 5.4.0-1049.53 |
| Ubuntu:20.04:LTS | linux-gcp-5.11 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-gcp-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-gcp-5.15 | 0 | 5.15.0-1006.9~20.04.1 |
| Ubuntu:20.04:LTS | linux-gcp-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-gke | 0 | No fix |
| Ubuntu:20.04:LTS | linux-gke-5.15 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-gkeop | 0 | 5.4.0-1021.22 |
| Ubuntu:20.04:LTS | linux-gkeop-5.15 | 0 | 5.15.0-1003.5~20.04.2 |
| Ubuntu:20.04:LTS | linux-hwe-5.11 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-hwe-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-hwe-5.15 | 0 | 5.15.0-33.34~20.04.1 |
| Ubuntu:20.04:LTS | linux-hwe-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-ibm | 0 | 5.4.0-1003.4 |
| Ubuntu:20.04:LTS | linux-ibm-5.15 | 0 | 5.15.0-1033.36~20.04.1 |
| Ubuntu:20.04:LTS | linux-intel-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-intel-iotg-5.15 | 0 | 5.15.0-1003.5~20.04.1 |
| Ubuntu:20.04:LTS | linux-iot | 0 | 5.4.0-1001.3 |
| Ubuntu:20.04:LTS | linux-kvm | 0 | 5.4.0-1044.46 |
| Ubuntu:20.04:LTS | linux-lowlatency-hwe-5.15 | 0 | 5.15.0-33.34~20.04.1 |
| Ubuntu:20.04:LTS | linux-oem-5.10 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-oem-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-oem-5.14 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-oem-5.6 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-oracle | 0 | 5.4.0-1052.56 |
| Ubuntu:20.04:LTS | linux-oracle-5.11 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-oracle-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-oracle-5.15 | 0 | 5.15.0-1007.9~20.04.1 |
| Ubuntu:20.04:LTS | linux-oracle-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-raspi | 0 | 5.4.0-1041.45 |
| Ubuntu:20.04:LTS | linux-raspi2 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-riscv | 0 | No fix |
| Ubuntu:20.04:LTS | linux-riscv-5.11 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-riscv-5.15 | 0 | 5.15.0-1015.17~20.04.1 |
| Ubuntu:20.04:LTS | linux-riscv-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-xilinx-zynqmp | 0 | 5.4.0-1020.24 |
| Ubuntu:22.04:LTS | linux | 0 | 5.13.0-19.19 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-aws | 0 | 5.13.0-1005.6 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-aws-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-aws-6.5 | 0 | 6.5.0-1008.8~22.04.1 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 0 | 6.8.0-1009.9~22.04.2 |
| Ubuntu:22.04:LTS | linux-azure | 0 | 5.13.0-1006.7 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-azure-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-azure-6.5 | 0 | 6.5.0-1007.7~22.04.1 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 0 | 6.8.0-1008.8~22.04.1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 0 | 5.15.0-1019.24.1 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-gcp | 0 | 5.13.0-1005.6 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | 0 | 6.5.0-1010.10~22.04.3 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 0 | 6.8.0-1010.11~22.04.1 |
| Ubuntu:22.04:LTS | linux-gke | 0 | 5.15.0-1002.2 |
| Ubuntu:22.04:LTS | linux-gkeop | 0 | 5.15.0-1001.2 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | 0 | 6.5.0-14.14~22.04.1 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 0 | 6.8.0-38.38~22.04.1 |
| Ubuntu:22.04:LTS | linux-ibm | 0 | 5.15.0-1002.2 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | 0 | No fix |
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