CVE-2023-53643 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer DereferenceCWE-825 — Expired Pointer Dereference5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 98.22%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 7

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: don't access released socket during error recovery While the error recovery work is temporarily failing reconnect attempts, running the 'nvme list' command causes a kernel NULL pointer dereference by calling getsockname() with a released socket. During error recovery work, the nvme tcp socket is released and a new one created, so it is not safe to access the socket without proper check.

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_kernel6.1 — 6.1.18+1
▶Debianlinux/linux_kernel< 6.1.20-1+2
▶CVEListV5linux/linux02c57a82c0081141abc19150beab48ef47f97f18 — fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d+3
▶debiandebian/linux< linux 6.1.20-1 (bookworm)

Patches

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

🔴Vulnerability Details

2
GHSA
GHSA-wvjj-gc57-3w9j: In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: don't access released socket during error recovery While the error rec↗2025-10-07
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OSV
CVE-2023-53643: In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: don't access released socket during error recovery While the error recov↗2025-10-07
▶

📋Vendor Advisories

2
Red Hat
kernel: nvme-tcp: don't access released socket during error recovery↗2025-10-07
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Debian
CVE-2023-53643: linux - In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: d...↗2023
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