CVE-2023-53681 – bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent

CVE ID : CVE-2023-53681

Published : Oct. 7, 2025, 4:15 p.m. | 19 minutes 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.

Severity: 0.0 | NA

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