SB2026080625 - NULL pointer dereference in Linux kernel mpls
Published: August 6, 2026
Security Bulletin ID
SB2026080625
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-64569)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.
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