CVE-2023-53643

nvme-tcp: don't access released socket during error recovery

MEDIUM
5.5
CVSS Score
Published: October 7, 2025 at 03:19 PM UTC
Updated: October 15, 2026 at 10:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.1 ≤ v < 6.1.186.2 ≤ v < 6.2.52c57a82c81141abc19150beab48ef47f97f186.1
Vendor states this is fixed in 76d54bf20cdcc1ed7569a89885e09636e9a8d71d (fixed)
Vendor states this is fixed in d82f762db4776fa11de88018f0f5de2d5db72a72 (fixed)
Vendor states this is fixed in fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d (fixed)
Vendor states this is fixed in 6.1 (unaffected)
Vendor states this is fixed in 6.1.18 (unaffected)
Vendor states this is fixed in 6.2.5 (unaffected)
Vendor states this is fixed in 6.3 (unaffected)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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