| Name | CVE-2026-52993 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | bullseye | 5.10.223-1 | vulnerable |
| bullseye (security) | 5.10.257-1 | vulnerable | |
| bookworm | 6.1.170-3 | vulnerable | |
| bookworm (security) | 6.1.174-1 | vulnerable | |
| trixie | 6.12.86-1 | vulnerable | |
| trixie (security) | 6.12.94-1 | fixed | |
| forky | 7.0.12-2 | fixed | |
| sid | 7.0.13-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | trixie | 6.12.94-1 | |||
| linux | source | (unstable) | 7.0.10-1 |
https://git.kernel.org/linus/d293ca716e7d5dffdaecaf6b9b2f857a33dc3d3a (7.1-rc1)