CVE-2026-23391

Summary

In the Linux kernel, the following vulnerability has been resolved:

netfilter: xt_CT: drop pending enqueued packets on template removal

Templates refer to objects that can go away while packets are sitting in nfqueue refer to:

  • helper, this can be an issue on module removal.
  • timeout policy, nfnetlink_cttimeout might remove it.

The use of templates with zone and event cache filter are safe, since this just copies values.

Flush these enqueued packets in case the template rule gets removed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < 55445134d42b84cb0a272e42c98d233ca65eca83affected
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < cc57506dd66555899560b9c0f24e813f034e12ecaffected
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < d2d0bae0c9a2a17b6990a2966f5cdce0813d6256affected
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < 63b8097cea1923fe82cd598068d0796da8c015ecaffected
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < 19a230dec6bb8928e3f96387f9085cf2c79bcef9affected
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < cb549925875fa06dd155e49db4ac2c5044c30f9caffected
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < 777d02efe3d630cca4c1b63962cec17c57711325affected
LinuxLinux24de58f465165298aaa8f286b2592f0163706cfe < f62a218a946b19bb59abdd5361da85fa4606b96baffected
LinuxLinux3.4affected
LinuxLinux0 < 3.4unaffected
LinuxLinux5.10.253 <= 5.10.*unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.167 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.78 <= 6.12.*unaffected
LinuxLinux6.18.20 <= 6.18.*unaffected
LinuxLinux6.19.10 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References