CVE-2024-48881

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.

CVSS 3.1

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

EPSS

0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-25)

CWE

CWE-476

Published

2025-01-11

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2
• https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0
• https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715
• https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1
• https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0

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