SB20260815284 - Use-after-free in Linux kernel netfilter ipset
Published: August 15, 2026
Security Bulletin ID
SB20260815284
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) Use-after-free (CVE-ID: CVE-2026-72435)
CWE-ID: CWE-416 - Use After Free
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 use-after-free in the ipset comment extension handling in netfilter when freeing comment extension pointers. A local user can trigger ipset comment initialization or cleanup operations to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3ca9982a8882470aa0ac4e8bb9a552b181d1efcd
- https://git.kernel.org/stable/c/50b70f56f3baaff46599f59b2d93fa2540120776
- https://git.kernel.org/stable/c/6e98407cb94e035bba98956adc9096a76d8b2a9f
- https://git.kernel.org/stable/c/8087bb360a936a6314d22b567e4b861656943eb6
- https://git.kernel.org/stable/c/93a775fd67f3ef34949a9523bfa69403ee74efdd
- https://git.kernel.org/stable/c/c9787d7c24ffd83019f379455e1b97fb4f0f75eb
- https://git.kernel.org/stable/c/d01b4b471f0fc5c396af62845e972ccf99cee29a
- https://git.kernel.org/stable/c/fcb565966534909377a16be5f7b065db2e25c8b5