CVE-2023-53681

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 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-28)

CWE

CWE-476

Published

2025-10-07

Modified

2026-10-28

Record from

the NVD, synced 2026-10-28

Affected

• linux:linux_kernel

References

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

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