CVE-2024-50142xfrm: validate new SA's prefixlen using SA family when sel.family is unset
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: xfrm: validate new SA's prefixlen using SA family when sel.family is unset This expands the validation introduced in commit 07bf7908950a ("xfrm: Validate address prefix lengths in the xfrm selector.") syzbot created an SA with usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Because of the AF_UNSPEC selector, verify_newsa_info doesn't put limits on prefixlen_{s,d}. But then copy_from_user_state sets x->sel.family to usersa.family (AF_INET). Do the same conversion in verify_newsa_info before validating prefixlen_{s,d}, since that's how prefixlen is going to be used later on.
- CVSS
- 5.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f31398570acf0f0804c644006f7bfa9067106b0a; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 401ad99a5ae7180dd9449eac104cb755f442e7f3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before bce1afaa212ec380bf971614f70909a27882b862; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7d9868180bd1e4cf37e7c5067362658971162366; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e68dd80ba498265d2266b12dc3459164f4ff0c4a; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.12 before 4.19.323; from 4.20 before 5.4.285; from 5.5 before 5.10.229; from 5.11 before 5.15.170; from 5.16 before 6.1.115; from 6.2 before 6.6.59; from 6.7 before 6.11.6; 6.12; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/f31398570acf0f0804c644006f7bfa9067106b0apatch
- https://git.kernel.org/stable/c/401ad99a5ae7180dd9449eac104cb755f442e7f3patch
- https://git.kernel.org/stable/c/8df5cd51fd70c33aa1776e5cbcd82b0a86649d73patch
- https://git.kernel.org/stable/c/2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71patch
- https://git.kernel.org/stable/c/bce1afaa212ec380bf971614f70909a27882b862patch
- https://git.kernel.org/stable/c/7d9868180bd1e4cf37e7c5067362658971162366patch
- https://git.kernel.org/stable/c/e68dd80ba498265d2266b12dc3459164f4ff0c4apatch
- https://git.kernel.org/stable/c/3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.