net: ipv6: fix field-spanning memcpy warning in AH output (Linux Linux)

CVE-2025-40363
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En bref

Source
NVD
EPSS
EPSS 0.21 % · centile 12 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: fix field-spanning memcpy warning in AH output Fix field-spanning memcpy warnings in ah6_output() and ah6_output_done() where extension headers are copied to/from IPv6 address fields, triggering fortify-string warnings about writes beyond the 16-byte address fields. memcpy: detected field-spanning write (size 40) of single field "&top_iph->saddr" at net/ipv6/ah6.c:439 (size 16) WARNING: CPU: 0 PID: 8838 at net/ipv6/ah6.c:439 ah6_output+0xe7e/0x14e0 net/ipv6/ah6.c:439 The warnings are false positives as the extension headers are intentionally placed after the IPv6 header in memory. Fix by properly copying addresses and extension headers separately, and introduce helper functions to avoid code duplication.

Références

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2da805a61ef5272a2773775ce14c3650adb84248 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9bf27de51bd6db5ff827780ec0eba55de230ba45 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0bf756ae1e69fec5e6332c37830488315d6d771b ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 75b16b2755e12999ad850756ddfb88ad4bfc7186 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f28dde240160f3c48a50d641d210ed6a3b9596ed ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c14cf41094136691c92ef756872570645d61f4a1
Linux · Linuxaffected 2.6.12 ; unaffected 0 < 2.6.12 ; unaffected 5.4.302 ≤ 5.4.* ; unaffected 5.10.247 ≤ 5.10.* ; unaffected 5.15.197 ≤ 5.15.* ; unaffected 6.1.159 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD