DEBIAN-CVE-2026-52993

Advisory lineage Upstream: 1 Downstream: 0
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CVE-2026-52993
Published: 24 Jun 2026, 17:17
Last modified:05 Jul 2026, 20:01

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Jun 2026, 17:17
Published
Vulnerability first disclosed
05 Jul 2026, 20:01
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • debian•linux

    all | all | < 5.10.259-1 | < 6.1.176-1 | < 6.12.94-1 | < 7.0.10-1

  • debian•linux-6.1

    < 6.1.176-1~deb11u1

References (1)