Use-after-free in Linux kernel - CVE-2026-64564
Published: August 4, 2026
Vulnerability identifier: #VU140938
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-64564
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a use-after-free in sctp_process_asconf_param() when processing crafted SCTP ASCONF DEL-IP parameters. A remote attacker can send a specially crafted SCTP ASCONF message to cause a denial of service.
The issue can occur when a single ASCONF carries DEL-IP parameters that free the cached transport and a later wildcard DEL-IP reuses the dangling transport pointer.
Affected software
Linux kernel
How to mitigate CVE-2026-64564
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/74e8f3e7114f0e26d1b2c4c048044db9fcc27603
- https://git.kernel.org/stable/c/85aca407c560aba81b5ce9d3d6cf94c74077d19b
- https://git.kernel.org/stable/c/9b2854f86f0b56e9027d68e7a3fc909d1a9b566f
- https://git.kernel.org/stable/c/d136b29bf91dd8e3161281b87de597b7311d9462
- https://git.kernel.org/stable/c/fedeb4468987bcaff85fe3061de5ae052d414740