CVE-2026-52998

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_osf: fix potential NULL dereference in ttl check The nf_osf_ttl() function accessed skb->dev to perform a local interface address lookup without verifying that the device pointer was valid. Additionally, the implementation utilized an in_dev_for_each_ifa_rcu loop to match the packet source address against local interface addresses. It assumed that packets from the same subnet should not see a decrement on the initial TTL. A packet might appear it is from the same subnet but it actually isn't especially...

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < f4de0777e4554a7de19c920accde6319dd530782, >= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < c996a90f3071cf43683e5423da31aadbe002b8b4, >= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < edc806f9122961f0d3819f7c69c14cccde31f277, >= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < 5d05de2f0928d81309a815ecc76d1a3ad72cbc16, >= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < 95be653a76793856ff8b2d8bd82c2943c23f5ca8, >= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < 79b90a96688e521771fa6ed3dc7864b76b8df293, >= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < 83fc5dd63455a779ea2dd0f7ffee3c920919d80b, >= 11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384 < 711987ba281fd806322a7cd244e98e2a81903114, >= 2.6.31, >= 2.6.31 < 5.10.258, >= 5.11 < 5.15.209, >= 5.16 < 6.1.175, >= 6.2 < 6.6.141, >= 6.7 < 6.12.91, >= 6.13 < 6.18.33, >= 6.19 < 7.0.10

Fixed versions

5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10

Technical data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-476