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CVE-2024-49900

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: jfs: Fix uninit-value access of new_ea in ea_buffer syzbot reports that lzo1x_1_do_compress is using uninit-value: ===========…

Published Oct 21, 2024CWE-908EPSS 0.28%

Overview

CVE-2024-49900 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. 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:

jfs: Fix uninit-value access of new_ea in ea_buffer

syzbot reports that lzo1x_1_do_compress is using uninit-value:

=====================================================

BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178

...

Uninit was stored to memory at:

ea_put fs/jfs/xattr.c:639 [inline]

...

Local variable ea_buf created at:

__jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662

__jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934

=====================================================

The reason is ea_buf->new_ea is not initialized properly.

Fix this by using memset to empty its content at the beginning

in ea_get().

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/2b59ffad47db1c46af25ccad157bb3b25147c35cRefgit.kernel.org/stable/c/6041536d18c5f51a84bc37cd568cbab61870031eRefgit.kernel.org/stable/c/7b24d41d47a6805c45378debf8bd115675d41da8Refgit.kernel.org/stable/c/7c244d5b48284a770d96ff703df2dfeadf804a73Refgit.kernel.org/stable/c/8ad8b531de79c348bcb8133e7f5e827b884226afRefgit.kernel.org/stable/c/8b1dcf25c26d42e4a68c4725ce52a0543c7878ccRefgit.kernel.org/stable/c/c076b3746224982eebdba5c9e4b1467e146c0d64Refgit.kernel.org/stable/c/d7444f91a9f93eaa48827087ed0f3381c194181dRefgit.kernel.org/stable/c/dac398ed272a378d2f42ac68ae408333a51baf52Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-49900?

CVE-2024-49900 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2024-49900?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-49900?

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-2024-49900?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-49900 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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