CVE-2023-53681

MEDIUM EPSS 3.1%
Published Oct 7, 20258mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 7, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent In some specific situations, the return value of __bch_btree_node_alloc may be NULL. This may lead to a potential NULL pointer dereference in caller function like a calling chain : btree_split->bch_btree_node_alloc->__bch_btree_node_alloc. Fix it by initializing the return value in __bch_btree_node_alloc.

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
3.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥3.10  –  <4.19.291
linuxlinux_kernel*≥4.20  –  <5.4.253
linuxlinux_kernel*≥5.5  –  <5.10.188
linuxlinux_kernel*≥5.11  –  <5.15.121
linuxlinux_kernel*≥5.16  –  <6.1.39
linuxlinux_kernel*≥6.2  –  <6.4.4

References 7

  • git.kernel.org https://git.kernel.org/stable/c/4514847aee18d9391a0cf3aad75d3567c72795a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/4514847aee18d9391a0cf3aad75d3567c72795a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03
    Patch