Stack-based buffer overflow in Linux kernel - CVE-2026-53002
Published: June 25, 2026
Vulnerability identifier: #VU135364
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-2026-53002
CWE-ID: CWE-121
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 a stack-based buffer overflow in the nf_nat_sip netfilter helper when processing crafted SIP/SDP messages. A remote attacker can send specially crafted network traffic to cause a denial of service.
The issue is triggered in mangle_content_len() during SIP message handling.
How to mitigate CVE-2026-53002
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e
- https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956
- https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5
- https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d
- https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2
- https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3
- https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34
- https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b