NULL pointer dereference in Linux kernel - CVE-2026-64569
Published: August 6, 2026
Vulnerability identifier: #VU141039
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64569
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in mpls_valid_fib_dump_req() when handling an RTM_GETROUTE dump request for AF_MPLS with strict checking and no RTA_OIF attribute. A local user can send a specially crafted netlink request to cause a denial of service.
The issue affects CONFIG_INET=n builds.
Affected software
Linux kernel
How to mitigate CVE-2026-64569
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/06db79411a280707c7e4bf4b221ff4e664b51502
- https://git.kernel.org/stable/c/56d96fededd61192cd7cc8d2b0f36adfd59036c3
- https://git.kernel.org/stable/c/5f6e7b32bd1fbde10fd31a4143260735ea535b8a
- https://git.kernel.org/stable/c/ad6284ced6a15e4abd57ca4d0793b7bd15ca52ce
- https://git.kernel.org/stable/c/d6eee7cd078aaf9dd75efc801f6c9b608a37cd71