CVE-2024-48881: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") leads a NULL pointer deference in cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >From the above code in cache_set_flush(), if previous registration code fails before allocating c->root, it is possible c->root is NULL as what it is initialized. __bch_btree_node_alloc() never returns NULL but c->root is possible to be NULL at above line 1721. This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.

Affected products

• Linux Linux Kernel: from 4.19.291, before 4.20 (fixed in 4.20); from 5.4.251, before 5.4.287 (fixed in 5.4.287); from 5.10.188, before 5.10.231 (fixed in 5.10.231); from 5.15.121, before 5.15.174 (fixed in 5.15.174); from 6.1.39, before 6.1.120 (fixed in 6.1.120); from 6.4.4, before 6.6.66 (fixed in 6.6.66); …

Published 2025-01-11. Last modified 2026-06-17.