Answer in brief
CVE-2024-50142 records a Medium severity (CVSS 5.5) vulnerability in xfrm: validate new SA's prefixlen using SA family when sel.family is unset. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f31398570acf0f0804c644006f7bfa9067106b0a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <401ad99a5ae7180dd9449eac104cb755f442e7f3 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8df5cd51fd70c33aa1776e5cbcd82b0a86649d73 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bce1afaa212ec380bf971614f70909a27882b862 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7d9868180bd1e4cf37e7c5067362658971162366 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e68dd80ba498265d2266b12dc3459164f4ff0c4a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 | f31398570acf0f0804c644006f7bfa9067106b0a, 401ad99a5ae7180dd9449eac104cb755f442e7f3, 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73, 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71, bce1afaa212ec380bf971614f70909a27882b862, 7d9868180bd1e4cf37e7c5067362658971162366, e68dd80ba498265d2266b12dc3459164f4ff0c4a, 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <V1.1.1 | V1.1.1 |
Published upstream
Nov 7, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.