CVE-2023-53304

MEDIUM EPSS 4.2%
Published Sep 16, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥5.10.166  –  <5.10.190
linuxlinux_kernel*≥5.15.91  –  <5.15.124
linuxlinux_kernel*≥6.1.9  –  <6.1.43
linuxlinux_kernel*≥6.2.1  –  <6.4.8
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/50cbb9d195c197af671869c8cadce3bd483735a0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8284a79136c384059e85e278da2210b809730287
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/893cb3c3513cf661a0ff45fe0cfa83fe27131f76
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/89a4d1a89751a0fbd520e64091873e19cc0979e8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/acaee227cf79c45a5d2d49c3e9a66333a462802c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd66733932399475fe933cb3ec03e687ed401462
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f718863aca469a109895cb855e6b81fff4827d71
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/50cbb9d195c197af671869c8cadce3bd483735a0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8284a79136c384059e85e278da2210b809730287
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/893cb3c3513cf661a0ff45fe0cfa83fe27131f76
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/89a4d1a89751a0fbd520e64091873e19cc0979e8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/acaee227cf79c45a5d2d49c3e9a66333a462802c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd66733932399475fe933cb3ec03e687ed401462
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f718863aca469a109895cb855e6b81fff4827d71
    Patch