CVE-2023-53304

Summary

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

netfilter: nft_set_rbtree: fix overlap expiration walk

The lazy gc on insert that should remove timed-out entries fails to release the other half of the interval, if any.

Can be reproduced with tests/shell/testcases/sets/0044interval_overlap_0 in nftables.git and kmemleak enabled kernel.

Second bug is the use of rbe_prev vs. prev pointer. If rbe_prev() returns NULL after at least one iteration, rbe_prev points to element that is not an end interval, hence it should not be removed.

Lastly, check the genmask of the end interval if this is active in the current generation.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7ab87a326f20c52ff4d9972052d085be951c704b < 8284a79136c384059e85e278da2210b809730287affected
LinuxLinux181859bdfb9734aca449512fccaee4cacce64aed < acaee227cf79c45a5d2d49c3e9a66333a462802caffected
LinuxLinux4aacf3d78424293e318c616016865380b37b9cc5 < 893cb3c3513cf661a0ff45fe0cfa83fe27131f76affected
LinuxLinux2bf1435fa19d2c58054391b3bba40d5510a5758c < 50cbb9d195c197af671869c8cadce3bd483735a0affected
LinuxLinux318cb24a4c3fce8140afaf84e4d45fcb76fb280b < 89a4d1a89751a0fbd520e64091873e19cc0979e8affected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < cd66733932399475fe933cb3ec03e687ed401462affected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < f718863aca469a109895cb855e6b81fff4827d71affected
LinuxLinux5.10.166 < 5.10.190affected
LinuxLinux5.15.91 < 5.15.124affected
LinuxLinux6.1.9 < 6.1.43affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux5.10.190 <= 5.10.*unaffected
LinuxLinux5.15.124 <= 5.15.*unaffected
LinuxLinux6.1.43 <= 6.1.*unaffected
LinuxLinux6.4.8 <= 6.4.*unaffected
LinuxLinux6.5 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References