bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent
Priority LOW 24CWE-476Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
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.
Why it matters now
EPSS 0.00149 4th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.19.291, 5.4.253, 5.10.188 +4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.10 and later | 4.19.291, 5.4.253, 5.10.188, 5.15.121, 6.1.39, 6.4.4, 6.5 | Patch available | CNA |
- Linux VendorLinux Affected 3.10 and later Fixed in 4.19.291, 5.4.253, 5.10.188, 5.15.121, 6.1.39, 6.4.4, 6.5 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 3.10 to before 4.19.291; 4.20 to before 5.4.253; 5.5 to before 5.10.188; 5.11 to before 5.15.121; 5.16 to before 6.1.39; 6.2 to before 6.4.4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.10 to before 4.19.291; 4.20 to before 5.4.253; 5.5 to before 5.10.188; 5.11 to before 5.15.121; 5.16 to before 6.1.39; 6.2 to before 6.4.4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.291, 5.4.253, 5.10.188, 5.15.121, 6.1.39, 6.4.4, 6.5
Vendor assessments
Red Hat
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53681
- 2026-10-03 Alias added: GHSA-7h48-rq2g-79x4
References
Patch 7
- https://git.kernel.org/stable/c/587b4e8bb5dac682f09280ab35db4632b29d5ac4
- https://git.kernel.org/stable/c/b070f29a61436f6f8a2e3abc7ea4f4be81695198
- https://git.kernel.org/stable/c/a4405f6ee03323410d7b10966fd67b35f71b1944
- https://git.kernel.org/stable/c/f67b0e3081f2a24170280a33ac66f6b112083c03
- https://git.kernel.org/stable/c/7ecea5ce3dc17339c280c75b58ac93d8c8620d9f
- https://git.kernel.org/stable/c/4514847aee18d9391a0cf3aad75d3567c72795a4
- https://git.kernel.org/stable/c/80fca8a10b604afad6c14213fdfd816c4eda3ee4
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- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2023-53681 · CVE Program
- CVE-2023-53681 · NVD
- FIRST EPSS
- GHSA-7h48-rq2g-79x4 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-53681 · Red Hat security data · CC BY 4.0
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