CVE-2024-56717
Medium · 5.5CVSS
5.5
EPSS
0.4%
Published
Dec 29, 2024
CISA due date
—
Cloudanix analysis
A coding mistake in the Linux network driver for certain switch chips can cause packet sending to fail with errors, potentially disrupting network traffic until the system software is updated.
- Exploitation
- Local Privilege
- Attacker needs
- Low Privilege
- Complexity
- Moderate
- Impact
- Denial Of Service
- Component
- OS kernel
- Class
- Improper Input Validation
- Remediation
- Upgrade
- Effort
- Medium
- Patch risk
- Low
What it actually does
Incorrect BIT_ULL value passed to single-port SRC_PORT index field in ocelot_ifh_set_basic during CPU-injected frame handling, causing packing library truncation warnings and transmit timeouts in ocelot/felix DSA paths.
Why it matters to the business
Network packet injection failures on affected switches can lead to transmit timeouts, lost frames, and degraded connectivity in environments using ocelot-based hardware, increasing operational risk until patched.
How an attack unfolds
An attacker triggers CPU-originated frame transmission through the ocelot switchdev or felix DSA tag paths; the incorrect port mask value reaches the packing routine, producing truncation errors and timeouts that disrupt normal operation.
How to fix it
Upgrade Linux kernel to 6.1.122 or later, or apply commit 59c4ca8d8d7918eb6e2df91d2c254827264be309; rebuild and reboot affected systems.
How to confirm the fix worked
Confirm running kernel version is 6.1.122 or newer; verify absence of 'Cannot store 0x40 inside bits 46-43' warnings during frame injection tests; inspect git history for the listed commit.
Typical attack path
- Identify system using ocelot switchdev or felix-8021q DSA tagging
- Trigger CPU frame injection via network stack or user-space tools
- Invoke ocelot_ifh_set_basic with BIT_ULL(port) instead of port index
- Packing library rejects out-of-range value, logs truncation warning
- Transmit times out, producing observable packet loss
How to detect it
Search kernel logs and dmesg for truncation warnings from lib/packing.c and ocelot_ifh_set_basic; correlate with sja1105 or felix transmit timeout messages and kthread worker stack traces.
- Cannot store 0x40 inside bits 46-43 - will truncate
- sja1105 spi2.0: xmit timed out
- sja1105 spi2.0: timed out polling for tstamp
- ocelot_ifh_set_basic+0x260/0x368
- felix_port_deferred_xmit+0x14c/0x258
What your security team should do
- Apply kernel upgrade to fixed version immediately due to production impact on affected hardware
- Monitor system logs for packing and transmit timeout messages until patched
- Test DSA-tagged interfaces post-upgrade to confirm stable frame injection
The record
In the Linux kernel, the following vulnerability has been resolved: net: mscc: ocelot: fix incorrect IFH SRC_PORT field in ocelot_ifh_set_basic() Packets injected by the CPU should have a SRC_PORT field equal to the CPU port module index in the Analyzer block (ocelot->num_phys_ports). The blamed commit copied the ocelot_ifh_set_basic() call incorrectly from ocelot_xmit_common() in net/dsa/tag_ocelot.c. Instead of calling with "x", it calls with BIT_ULL(x), but the field is not a port mask, but rather a single port index. [ side note: this is the technical debt of code duplication :( ] The error used to be silent and doesn't appear to have other user-visible manifestations, but with new changes in the packing library, it now fails loudly as follows: ------------[ cut here ]------------ Cannot store 0x40 inside bits 46-43 - will truncate sja1105 spi2.0: xmit timed out WARNING: CPU: 1 PID: 102 at lib/packing.c:98 __pack+0x90/0x198 sja1105 spi2.0: timed out polling for tstamp CPU: 1 UID: 0 PID: 102 Comm: felix_xmit Tainted: G W N 6.13.0-rc1-00372-gf706b85d972d-dirty #2605 Call trace: __pack+0x90/0x198 (P) __pack+0x90/0x198 (L) packing+0x78/0x98 ocelot_ifh_set_basic+0x260/0x368 ocelot_port_inject_frame+0xa8/0x250 felix_port_deferred_xmit+0x14c/0x258 kthread_worker_fn+0x134/0x350 kthread+0x114/0x138 The code path pertains to the ocelot switchdev driver and to the felix secondary DSA tag protocol, ocelot-8021q. Here seen with ocelot-8021q. The messenger (packing) is not really to blame, so fix the original commit instead.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Debian:11 | linux-6.1 | 0 | 6.1.128-1~deb11u1 |
| Debian:11 | linux-6.1 | 0 | 6.1.6.1.128-1~deb11u1 |
| Debian:12 | linux | 0 | 6.1.123-1 |
| Debian:13 | linux | 0 | No fix |
| Debian:13 | linux | 0 | 6.12.8-1 |
| Linux | Kernel | 0 | 6.1.122 |
| Mageia:9 | dwarves | 0 | 1.29-1.mga9 |
| Mageia:9 | kernel | 0 | 6.6.74-1.mga9 |
| Mageia:9 | kernel-linus | 0 | 6.6.74-1.mga9 |
| Mageia:9 | kmod-virtualbox | 0 | 7.0.24-64.mga9 |
| Mageia:9 | kmod-xtables-addons | 0 | 3.24-70.mga9 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 0 | No fix |
| 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-azure | 0 | No fix |
| Ubuntu:18.04:LTS | linux-azure-5.3 | 0 | No fix |
| 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-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-edge | 0 | No fix |
| 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:20.04:LTS | linux | 0 | No fix |
| Ubuntu:20.04:LTS | linux-aws | 0 | No fix |
| 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 | No fix |
| Ubuntu:20.04:LTS | linux-aws-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-azure | 0 | No fix |
| 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 | No fix |
| 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 | No fix |
| Ubuntu:20.04:LTS | linux-bluefield | 0 | No fix |
| Ubuntu:20.04:LTS | linux-gcp | 0 | No fix |
| 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 | No fix |
| 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 | No fix |
| Ubuntu:20.04:LTS | linux-gkeop-5.15 | 0 | No fix |
| 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 | No fix |
| Ubuntu:20.04:LTS | linux-hwe-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-ibm | 0 | No fix |
| Ubuntu:20.04:LTS | linux-ibm-5.15 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-intel-5.13 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-intel-iotg-5.15 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-iot | 0 | No fix |
| Ubuntu:20.04:LTS | linux-kvm | 0 | No fix |
| Ubuntu:20.04:LTS | linux-lowlatency-hwe-5.15 | 0 | No fix |
| 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 | No fix |
| 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 | No fix |
| Ubuntu:20.04:LTS | linux-oracle-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-raspi | 0 | No fix |
| 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 | No fix |
| Ubuntu:20.04:LTS | linux-riscv-5.8 | 0 | No fix |
| Ubuntu:20.04:LTS | linux-xilinx-zynqmp | 0 | No fix |
| Ubuntu:22.04:LTS | linux | 0 | No fix |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-aws | 0 | No fix |
| 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 | No fix |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 0 | 6.8.0-1029.31~22.04.1 |
| Ubuntu:22.04:LTS | linux-azure | 0 | No fix |
| 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 | No fix |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 0 | 6.8.0-1029.34~22.04.1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 0 | No fix |
| 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 | No fix |
| 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 | No fix |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 0 | 6.8.0-1030.32~22.04.1 |
| Ubuntu:22.04:LTS | linux-gke | 0 | No fix |
| Ubuntu:22.04:LTS | linux-gkeop | 0 | No fix |
| 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 | No fix |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 0 | 6.8.0-60.63~22.04.1 |
| Ubuntu:22.04:LTS | linux-ibm | 0 | No fix |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 0 | 6.8.0-1026.26~22.04.1 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | 0 | No fix |
| Ubuntu:22.04:LTS | linux-intel-iotg | 0 | No fix |
| Ubuntu:22.04:LTS | linux-kvm | 0 | No fix |
| Ubuntu:22.04:LTS | linux-lowlatency | 0 | No fix |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 0 | 6.8.0-60.63.1~22.04.1 |
| Ubuntu:22.04:LTS | linux-nvidia | 0 | No fix |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 0 | 6.8.0-1028.31~22.04.1 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 0 | No fix |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oem-6.5 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oracle | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 0 | 6.8.0-1026.27~22.04.1 |
| Ubuntu:22.04:LTS | linux-raspi | 0 | No fix |
| Ubuntu:22.04:LTS | linux-realtime | 0 | No fix |
| Ubuntu:22.04:LTS | linux-riscv | 0 | No fix |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 0 | 6.8.0-62.65~22.04.1 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | 0 | No fix |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 0 | No fix |
| Ubuntu:22.04:LTS:for:NVIDIA:BlueField | linux-bluefield | 0 | No fix |
| Ubuntu:24.04:LTS | linux | 0 | No fix |
| Ubuntu:24.04:LTS | linux | 0 | 6.8.0-60.63 |
| Ubuntu:24.04:LTS | linux-aws | 0 | No fix |
| Ubuntu:24.04:LTS | linux-aws | 0 | 6.8.0-1029.31 |
| Ubuntu:24.04:LTS | linux-azure | 0 | No fix |
| Ubuntu:24.04:LTS | linux-azure | 0 | 6.8.0-1029.34 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 0 | 6.11.0-1012.12~24.04.1 |
| Ubuntu:24.04:LTS | linux-azure-fde | 0 | No fix |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 0 | 6.8.0-1016.17 |
| Ubuntu:24.04:LTS | linux-gcp | 0 | No fix |
| Ubuntu:24.04:LTS | linux-gcp | 0 | 6.8.0-1030.32 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 0 | 6.11.0-1011.11~24.04.1 |
| Ubuntu:24.04:LTS | linux-gke | 0 | No fix |
| Ubuntu:24.04:LTS | linux-gke | 0 | 6.8.0-1025.29 |
| Ubuntu:24.04:LTS | linux-gkeop | 0 | No fix |
| Ubuntu:24.04:LTS | linux-gkeop | 0 | 6.8.0-1012.14 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 0 | 6.11.0-21.21~24.04.1 |
| Ubuntu:24.04:LTS | linux-ibm | 0 | No fix |
| Ubuntu:24.04:LTS | linux-ibm | 0 | 6.8.0-1026.26 |
| Ubuntu:24.04:LTS | linux-intel | 0 | No fix |
| Ubuntu:24.04:LTS | linux-lowlatency | 0 | No fix |
| Ubuntu:24.04:LTS | linux-lowlatency | 0 | 6.8.0-60.63.1 |
| Ubuntu:24.04:LTS | linux-nvidia | 0 | No fix |
| Ubuntu:24.04:LTS | linux-nvidia | 0 | 6.8.0-1028.31 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | 0 | 6.11.0-1007.7 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 0 | No fix |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 0 | 6.8.0-1028.31.1 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 0 | No fix |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 0 | 6.8.0-1008.8 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 0 | No fix |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 0 | 6.11.0-1017.17 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | 0 | No fix |
| Ubuntu:24.04:LTS | linux-oem-6.8 | 0 | 6.8.0-1028.28 |
| Ubuntu:24.04:LTS | linux-oracle | 0 | No fix |
| Ubuntu:24.04:LTS | linux-oracle | 0 | 6.8.0-1026.27 |
| Ubuntu:24.04:LTS | linux-raspi | 0 | No fix |
| Ubuntu:24.04:LTS | linux-raspi | 0 | 6.8.0-1028.32 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | 0 | No fix |
| Ubuntu:24.04:LTS | linux-realtime | 0 | No fix |
| Ubuntu:24.04:LTS | linux-riscv | 0 | No fix |
| Ubuntu:24.04:LTS | linux-riscv | 0 | 6.8.0-60.63.1 |
| Ubuntu:24.04:LTS | linux-xilinx | 0 | 6.8.0-1017.18 |
| Ubuntu:24.10 | linux | 0 | No fix |
| Ubuntu:24.10 | linux-aws | 0 | No fix |
| Ubuntu:24.10 | linux-azure | 0 | No fix |
| Ubuntu:24.10 | linux-gcp | 0 | No fix |
| Ubuntu:24.10 | linux-lowlatency | 0 | No fix |
| Ubuntu:24.10 | linux-lowlatency | 0 | 6.11.0-1011.12 |
| Ubuntu:24.10 | linux-oracle | 0 | No fix |
| Ubuntu:24.10 | linux-raspi | 0 | No fix |
| Ubuntu:24.10 | linux-raspi | 0 | 6.11.0-1010.10 |
| Ubuntu:24.10 | linux-realtime | 0 | No fix |
| Ubuntu:24.10 | linux-riscv | 0 | No fix |
| Ubuntu:25.04 | linux-azure-fde | 0 | No fix |
| Ubuntu:Nvidia-BlueField:22.04:LTS | linux-bluefield | 0 | No fix |
Related vulnerabilities
- CVE-2025-37924 In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix… Also affects linux-6.1
- CVE-2025-21760 In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU… Also affects linux-6.1
- CVE-2025-21758 In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: add RCU… Also affects linux-6.1
- CVE-2025-21664 In the Linux kernel, the following vulnerability has been resolved: dm thin: make… Also affects linux-6.1
- CVE-2024-57946 In the Linux kernel, the following vulnerability has been resolved: virtio-blk: don't… Also affects linux-6.1
- CVE-2024-57945 In the Linux kernel, the following vulnerability has been resolved: riscv: mm: Fix the… Also affects linux-6.1
- CVE-2025-21660 In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix… Also affects linux-6.1
- CVE-2025-21662 In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix… Also affects linux-6.1