ipvs: avoid out-of-bounds write in ip_vs_nat_icmp (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.12 % · percentile 2 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: avoid out-of-bounds write in ip_vs_nat_icmp Sashiko warns that local attacker can modify the packet while it is processed by IPVS. Some places read the IP ihl field multiple times which can cause out-of-bounds access. One such place is ip_vs_nat_icmp where we can write after the validated area. Fix it by providing ciph argument just like it is done for IPv6 and use ciph->len as offset to the embedded transport header. Modify some IPv4 header checks by reading the ihl field only once.
References
- https://git.kernel.org/stable/c/3b8f79af0e98f27b932b0b416e9c52b692d31ff9
- https://git.kernel.org/stable/c/3c779b258c9c3c3567af68d4f45c2f751f35bd0e
- https://git.kernel.org/stable/c/be65fa324640c7a95e30b146159a2be5cc73f22e
- https://git.kernel.org/stable/c/a69a4b3fff5814d079beff9a1e9d369994b2ed47
- https://git.kernel.org/stable/c/243d0187ec4c3837b9b0004f18d1068e46115760
- https://git.kernel.org/stable/c/646922a0379496154e8c8faca4f8e2fd9100cacc
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-64411
- GCVE · GCVE-0-2026-74724
CERT-FR advisories
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1232 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1090 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3b8f79af0e98f27b932b0b416e9c52b692d31ff9 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3c779b258c9c3c3567af68d4f45c2f751f35bd0e ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < be65fa324640c7a95e30b146159a2be5cc73f22e ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a69a4b3fff5814d079beff9a1e9d369994b2ed47 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 243d0187ec4c3837b9b0004f18d1068e46115760 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 646922a0379496154e8c8faca4f8e2fd9100cacc |
| Linux · Linux | affected 2.6.12 ; unaffected 0 < 2.6.12 ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.152 ≤ 6.6.* ; unaffected 6.12.104 ≤ 6.12.* ; unaffected 6.18.45 ≤ 6.18.* |
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 |