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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00036.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 affected < 587b4e8bb5dac682f09280ab35db4632b29d5ac4
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 affected < b070f29a61436f6f8a2e3abc7ea4f4be81695198
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 affected < a4405f6ee03323410d7b10966fd67b35f71b1944
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 affected < f67b0e3081f2a24170280a33ac66f6b112083c03
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 affected < 7ecea5ce3dc17339c280c75b58ac93d8c8620d9f
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 affected < 4514847aee18d9391a0cf3aad75d3567c72795a4
cafe563591446cf80bfbc2fe3bc72a2e36cf1060 affected < 80fca8a10b604afad6c14213fdfd816c4eda3ee4
Linux Linux affected
Version Status Constraints
3.10 affected —
0 unaffected < 3.10
4.19.291 unaffected ≤ 4.19.*
5.4.253 unaffected ≤ 5.4.*
5.10.188 unaffected ≤ 5.10.*
5.15.121 unaffected ≤ 5.15.*
6.1.39 unaffected ≤ 6.1.*
6.4.4 unaffected ≤ 6.4.*
6.5 unaffected ≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/4514847aee18d9391a0cf3aad75d3567c72795a4 cve-icon cve-icon
https://git.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4 cve-icon cve-icon
https://git.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9f cve-icon cve-icon
https://git.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4 cve-icon cve-icon
https://git.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944 cve-icon cve-icon
https://git.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198 cve-icon cve-icon
https://git.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025100708-CVE-2023-53681-7a5a@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53681 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53681 cve-icon
History

Tue, 03 Feb 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Wed, 08 Oct 2025 13:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Wed, 08 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Tue, 07 Oct 2025 15:30:00 +0000

Type Values Removed Values Added
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.
Title bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-07T15:21:35.315Z

Reserved: 2025-10-07T15:16:59.664Z

Link: CVE-2023-53681

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2025-10-07T16:15:52.287

Modified: 2026-02-03T18:25:07.470

Link: CVE-2023-53681

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-07T00:00:00Z

Links: CVE-2023-53681 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-08T13:35:35Z

Weaknesses