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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-52993 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0274f24485fc38032d4093e463dc3ff5c7a667c9 kernel.org
https://git.kernel.org/stable/c/1d5e589055880fae229e229e1929e087dbe08cf3 kernel.org
https://git.kernel.org/stable/c/29940fff14110ca48c5ccc168d121665b51bb778 kernel.org
https://git.kernel.org/stable/c/4d104882bc815d4ec666ace9155f5f52715879a6 kernel.org
https://git.kernel.org/stable/c/4ee4deadaae7cb2e3d53af0fc889cf92a73413c0 kernel.org
https://git.kernel.org/stable/c/a438975a6dcdbd70865978c021650d1485586f0b kernel.org
https://git.kernel.org/stable/c/d293ca716e7d5dffdaecaf6b9b2f857a33dc3d3a kernel.org
https://git.kernel.org/stable/c/d3556656c6daebf8def751c7e71d11dd0a180d24 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-52993
NVD Published Date:
06/24/2026
NVD Last Modified:
06/24/2026
Source:
kernel.org