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CVE-2024-48881

5.5 · MEDIUM

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…

Published Jan 11, 2025CWE-476EPSS 0.26%

Overview

CVE-2024-48881 is a medium-severity vulnerability. It was published on January 11, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2Refgit.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0Refgit.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715Refgit.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1Refgit.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0Refgit.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667Refgit.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464Reflists.debian.org/debian-lts-announce/2025/03/msg00001.htmlReflists.debian.org/debian-lts-announce/2025/03/msg00002.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-48881?

CVE-2024-48881 is a medium-severity vulnerability. It was published on January 11, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-48881?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-48881?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-48881?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-48881 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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