CVE-2026-52993

tipc: fix double-free in tipc_buf_append()

CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.40 % · centile 35 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: fix double-free in tipc_buf_append() tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a pointer to a local variable which was a copy of the caller's skb pointer. If the skb was reallocated and validation subsequently failed, the error handling path would free the original skb pointer, which had already been freed, leading to double-free. Fix this by checking if head now points to a newly allocated reassembled skb. If it does, reassign *headbuf for later freeing operations.

Faiblesses (CWE)

  • CWE-763 — Libération d'un pointeur ou d'une référence invalide
  • CWE-415 — Double libération

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat-SADP
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected d618d09a68e4eed7a435beb2e355250f6f40664a < a438975a6dcdbd70865978c021650d1485586f0b ; affected d618d09a68e4eed7a435beb2e355250f6f40664a < 4ee4deadaae7cb2e3d53af0fc889cf92a73413c0 ; affected d618d09a68e4eed7a435beb2e355250f6f40664a < d3556656c6daebf8def751c7e71d11dd0a180d24 ; affected d618d09a68e4eed7a435beb2e355250f6f40664a < 0274f24485fc38032d4093e463dc3ff5c7a667c9 ; affected d618d09a68e4eed7a435beb2e355250f6f40664a < 4d104882bc815d4ec666ace9155f5f52715879a6 ; affected d618d09a68e4eed7a435beb2e355250f6f40664a < 1d5e589055880fae229e229e1929e087dbe08cf3
Linux · Linuxaffected 4.15 ; unaffected 0 < 4.15 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.141 ≤ 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