CVE-2025-39964
Low · 3.3 CISA KEVCVSS
3.3
EPSS
1.4%
Published
Oct 13, 2025
CISA due date
Sep 21, 2026
The record
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may create inconsistencies in the internal socket state. Disallow this by adding a new ctx->write field that indiciates exclusive ownership for writing.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Linux | Kernel | 2.6.38 | 5.10.245 |
| Mageia:9 | kernel | 0 | 6.6.116-1.mga9 |
| Mageia:9 | kernel-linus | 0 | 6.6.116-1.mga9 |
| Mageia:9 | kmod-virtualbox | 0 | 7.1.14-13.mga9 |
| Mageia:9 | kmod-xtables-addons | 0 | 3.24-87.mga9 |
| SUSE:Linux Enterprise High Availability Extension 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_21 | 0 | 1-150600.13.5.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-64kb | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-default | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-default-base | 0 | 6.4.0-150600.23.92.1.150600.12.42.2 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-docs | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-obs-build | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-source | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-syms | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-zfcpdump | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | kernel-default | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | kernel-default-base | 0 | 6.4.0-150600.23.92.1.150600.12.42.2 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | kernel-docs | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | kernel-obs-build | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | kernel-source | 0 | 6.4.0-150600.23.92.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | kernel-syms | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | dtb-aarch64 | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-64kb | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-debug | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-default | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-default-base | 0 | 6.4.0-150600.23.92.1.150600.12.42.2 |
| openSUSE:Leap 15.6 | kernel-docs | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-kvmsmall | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-obs-build | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-obs-qa | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-source | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-syms | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 15.6 | kernel-zfcpdump | 0 | 6.4.0-150600.23.92.1 |
| openSUSE:Leap 16.0 | dtb-aarch64 | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-64kb | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-azure | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-default | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-default-base | 0 | 6.12.0-160000.27.1.160000.2.8 |
| openSUSE:Leap 16.0 | kernel-docs | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-kvmsmall | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-obs-build | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-obs-qa | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-rt | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-source | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-syms | 0 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-zfcpdump | 0 | 6.12.0-160000.27.1 |
Related vulnerabilities
- CVE-2026-23226 In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock… Also affects Kernel
- CVE-2026-23225 In the Linux kernel, the following vulnerability has been resolved: sched/mmcid: Don't… Also affects Kernel
- CVE-2026-23230 In the Linux kernel, the following vulnerability has been resolved: smb: client: split… Also affects Kernel
- CVE-2026-23224 In the Linux kernel, the following vulnerability has been resolved: erofs: fix UAF issue… Also affects Kernel
- CVE-2026-23227 In the Linux kernel, the following vulnerability has been resolved: drm/exynos: vidi: use… Also affects Kernel
- CVE-2026-23223 In the Linux kernel, the following vulnerability has been resolved: xfs: fix UAF in… Also affects Kernel
- CVE-2026-23228 In the Linux kernel, the following vulnerability has been resolved: smb: server: fix leak… Also affects Kernel
- CVE-2026-23229 In the Linux kernel, the following vulnerability has been resolved: crypto: virtio - Add… Also affects Kernel