SB20260425172 - NULL pointer dereference in Linux kernel net bonding driver
Published: April 25, 2026
Security Bulletin ID
SB20260425172
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-2026-31546)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 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/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in bond_debug_rlb_hash_show when reading debugfs entries for RLB hash-table entries with no assigned slave. A local user can read the affected debugfs entry to cause a denial of service.
The issue occurs when an entry remains on the rx_hashtbl_used_head list with its slave pointer set to NULL.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/017d674cf6930e9586a29ee808c7ca09d1396d07
- https://git.kernel.org/stable/c/0a3f8cd3f370247ded14d38d216b49dd30eade76
- https://git.kernel.org/stable/c/19f0fd87df0e5746b24f5caa465a66a8c6e6e241
- https://git.kernel.org/stable/c/2ec2c777f357a83c3d503d8d9370c90b60f0ae63
- https://git.kernel.org/stable/c/605b52497bf89b3b154674deb135da98f916e390
- https://git.kernel.org/stable/c/6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4
- https://git.kernel.org/stable/c/ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466c
- https://git.kernel.org/stable/c/edacf1613f7b26423ebfa8b2892e7453c4235354