CVE-2026-68121

pppoe: reload header pointer after dev_hard_header()

HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.37 % · centile 30 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Received

Description

In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after dev_hard_header() pppoe_sendmsg() saves a pointer to the PPPoE header before calling dev_hard_header(). Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This can happen when a send is blocked in copy_from_user() while the first non-Ethernet port is added to an empty team device. The team's delegated GRE header callback then expands the skb head. PPPoE subsequently writes six bytes through the stale pointer into the freed head. Reload the PPPoE header through the skb's network-header offset after device header creation. pskb_expand_head() updates that offset when it relocates the head.

Faiblesses (CWE)

  • CWE-416 — Utilisation après libération

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7a56e7c9b08e08fd55a1bcada24cf4fe3782b722 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6eed5ae7887a93160803d2b81ff88e75eefd4a4c ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ba3409369c5413cdf0dcbf3a928f76b48e8c3e6a ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e6493a4d1ee17595766165fa446d45b7e0c318d0 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7e9fbd7f96bcde63a7c798fe16b38cedee7a1501 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6866abf59976d273164a6624234d96a967280223
Linux · Linuxaffected 2.6.12 ; unaffected 0 < 2.6.12 ; unaffected 5.10.265 ≤ 5.10.* ; unaffected 5.15.216 ≤ 5.15.* ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.148 ≤ 6.6.*

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