Veille CVE
CVE-2026-52993
9.8 CritiqueDescription
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.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 9.8 Critique | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 7.0 Élevée | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Faiblesses (CWE)
Références
- https://git.kernel.org/stable/c/0274f24485fc38032d4093e463dc3ff5c7a667c9 Patch
- https://git.kernel.org/stable/c/1d5e589055880fae229e229e1929e087dbe08cf3 Patch
- https://git.kernel.org/stable/c/29940fff14110ca48c5ccc168d121665b51bb778 Patch
- https://git.kernel.org/stable/c/4d104882bc815d4ec666ace9155f5f52715879a6 Patch
- https://git.kernel.org/stable/c/4ee4deadaae7cb2e3d53af0fc889cf92a73413c0 Patch
- https://git.kernel.org/stable/c/a438975a6dcdbd70865978c021650d1485586f0b Patch
- https://git.kernel.org/stable/c/d293ca716e7d5dffdaecaf6b9b2f857a33dc3d3a Patch
- https://git.kernel.org/stable/c/d3556656c6daebf8def751c7e71d11dd0a180d24 Patch
- https://access.redhat.com/errata/RHSA-2026:45115
- https://access.redhat.com/errata/RHSA-2026:45116
- https://access.redhat.com/errata/RHSA-2026:47017
- https://access.redhat.com/errata/RHSA-2026:49212
- https://access.redhat.com/security/cve/CVE-2026-52993 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492437 Third Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52993.json Third Party Advisory