Use-after-free in Linux kernel - CVE-2026-52924
Published: June 25, 2026
Vulnerability identifier: #VU135452
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-52924
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in the SCTP outqueue and stream scheduler state handling when processing a stale COOKIE-ECHO condition. A remote attacker can send a stale cookie error during SCTP association handling to cause a denial of service.
The issue occurs when an association is rolled back from COOKIE_ECHOED to COOKIE_WAIT, leaving scheduler state referencing freed stream entries.
How to mitigate CVE-2026-52924
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1d4652f677906a64487c13f9ace54b0eb263b5d0
- https://git.kernel.org/stable/c/2afc9e684dc7fecf73db1edc937ebbc47b4b68dc
- https://git.kernel.org/stable/c/3c0741a441a7df7099d7ca6a64a6a0de09c677c8
- https://git.kernel.org/stable/c/83ade59e5da365f4bf8bce72c5a38774202b442f
- https://git.kernel.org/stable/c/84b7a319105db2f917ccdcf502bdc866082b1285
- https://git.kernel.org/stable/c/a6207349e703cfc04756a4d16dec9176135813a5
- https://git.kernel.org/stable/c/e374b22e9b07b72a25909621464ff74096151bfb
- https://git.kernel.org/stable/c/f46e1d1a758878f0d22c4fbbd1bf42bb7165d1e8