CVE-2024-49850

5.5 · MEDIUM

Published Oct 21, 2024 linux CWE-476 EPSS 0.21% (11th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-49850 is a medium-severity vulnerability affecting linux linux_kernel. It was published on October 21, 2024 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:

bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos

In case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL

referencing a non-existing BTF type, function bpf_core_calc_relo_insn

would cause a null pointer deference.

Fix this by adding a proper check upper in call stack, as malformed

relocation records could be passed from user space.

Simplest reproducer is a program:

r0 = 0

exit

With a single relocation record:

.insn_off = 0, /* patch first instruction */

.type_id = 100500, /* this type id does not exist */

.access_str_off = 6, /* offset of string "0" */

.kind = BPF_CORE_TYPE_ID_LOCAL,

See the link for original reproducer or next commit for a test case.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 5.17, < 6.1.113	Affected

References

Ref git.kernel.org/stable/c/2288b54b96dcb55bedebcef3572bb8821fc5e708 Ref git.kernel.org/stable/c/3d2786d65aaa954ebd3fcc033ada433e10da21c4 Ref git.kernel.org/stable/c/584cd3ff792e1edbea20b2a7df55897159b0be3e Ref git.kernel.org/stable/c/dc7ce14f00bcd50641f2110b7a32aa6552e0780f Ref git.kernel.org/stable/c/e7e9c5b2dda29067332df2a85b0141a92b41f218 Ref lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-49850?

CVE-2024-49850 is a medium-severity vulnerability affecting linux linux_kernel. It was published on October 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-49850?

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-2024-49850?

How can CyberStrike help with CVE-2024-49850?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-49850 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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