CVE-2023-53304 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer DereferenceCWE-772 — Missing Release of Resource after Effective Lifetime5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 95.77%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedSep 16

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 tha…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶NVDlinux/linux_kernel5.10.166 — 5.10.190+5
▶Debianlinux/linux_kernel< 5.10.191-1+3
▶CVEListV5linux/linux7ab87a326f20c52ff4d9972052d085be951c704b — 8284a79136c384059e85e278da2210b809730287+7
▶debiandebian/linux< linux 6.1.52-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
OSV
CVE-2023-53304: In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: fix overlap expiration walk The lazy gc on insert that↗2025-09-16
▶
GHSA
GHSA-phm5-wwmp-pqvr: In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: fix overlap expiration walk The lazy gc on insert tha↗2025-09-16
▶

📋Vendor Advisories

2
Red Hat
kernel: Linux kernel: Denial of Service in netfilter due to improper garbage collection↗2025-09-16
▶
Debian
CVE-2023-53304: linux - In the Linux kernel, the following vulnerability has been resolved: netfilter: ...↗2023
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CVE-2023-53304 — NULL Pointer Dereference in Linux | cvebase