ipv4: validate checksum_start before completing checksum (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.79 % · centile 56 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: ipv4: validate checksum_start before completing checksum If a packet with bad checksum metadata gets into the ipv4 stack, skb_checksum_help can corrupt the network header and cause a bunch of mischief. This was discovered and reported by Paulos, and has been reporoduced by others independently since. We really shouldn't allow such packets in, but as a defence in depth measure, let's also check before we complete the checksum. A more complete validation at input is forthcoming, but needs more work.
Faiblesses (CWE)
- CWE-20 — Validation d'entrée incorrecte
Références
- https://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956
- https://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40a
- https://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbf
- https://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8b
- https://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbb
- https://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0
- https://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326
- https://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822
- https://pwn.ai/blog/pwnescape
- https://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challenge
- http://www.openwall.com/lists/oss-security/2026/10/15/5
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | Linux |
| CVSS 3.1 | CRITICAL 9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-102044
- GCVE · GCVE-0-2026-99999
Avis du CERT-FR
- CERTFR-2026-AVI-1432 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1431 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1401 — Multiples vulnérabilités dans Docker Desktop · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1374 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1373 — Multiples vulnérabilités dans les produits Red Hat · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected f43798c27684ab925adde7d8acc34c78c6e50df8 < a464d950f31c89565cbaae038cc60db04fe01956 ; affected f43798c27684ab925adde7d8acc34c78c6e50df8 < 0fab003ef4698e0628060a45a48f14b43ba2a40a ; affected f43798c27684ab925adde7d8acc34c78c6e50df8 < 94524b7b32691de2e2ce162c04d6cbc9106e5cbf ; affected f43798c27684ab925adde7d8acc34c78c6e50df8 < a65f69e0f38ffbed1b128029e09097436416dc8b ; affected f43798c27684ab925adde7d8acc34c78c6e50df8 < 32a8b0adaa18e52aaa0b246b5ffe683075354dbb ; affected f43798c27684ab925adde7d8acc34c78c6e50df8 < f3e835af6226f1dd12160cbd696081e9b6155de0 |
| Linux · Linux | affected 2.6.27 ; unaffected 0 < 2.6.27 ; unaffected 5.10.272 ≤ 5.10.* ; unaffected 5.15.223 ≤ 5.15.* ; unaffected 6.1.190 ≤ 6.1.* ; unaffected 6.6.159 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |