CVE-2024-42312: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: sysctl: always initialize i_uid/i_gid Always initialize i_uid/i_gid inside the sysfs core so set_ownership() can safely skip setting them. Commit 5ec27ec735ba ("fs/proc/proc_sysctl.c: fix the default values of i_uid/i_gid on /proc/sys inodes.") added defaults for i_uid/i_gid when set_ownership() was not implemented. It also missed adjusting net_ctl_set_ownership() to use the same default values in case the computation of a better value failed.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-908 CWE-908

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.9.187 — 4.10
linux	linux_kernel	4.14.135 — 4.15
linux	linux_kernel	4.19.61 — 4.20
linux	linux_kernel	5.1.20 — 5.2
linux	linux_kernel	5.2.3 — 5.10.224
linux	linux_kernel	5.11 — 5.15.165
linux	linux_kernel	5.16 — 6.1.104
linux	linux_kernel	6.2 — 6.6.45
linux	linux_kernel	6.7 — 6.10.3

References

Advisories & Patches

https://git.kernel.org/stable/c/1deae34db9f4f8e0e03f891be2e2e15c15c8ac05 https://git.kernel.org/stable/c/34a86adea1f2b3c3f9d864c8cce09dca644601ab https://git.kernel.org/stable/c/98ca62ba9e2be5863c7d069f84f7166b45a5b2f4 https://git.kernel.org/stable/c/b2591c89a6e2858796111138c38fcb6851aa1955 https://git.kernel.org/stable/c/c7e2f43d182f5dde473389dbb39f16c9f0d64536 https://git.kernel.org/stable/c/ffde3af4b29bf97d62d82e1d45275587e10a991a

Other References

https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html https://cert-portal.siemens.com/productcert/html/ssa-265688.html

Frequently Asked Questions

What is CVE-2024-42312? +

In the Linux kernel, the following vulnerability has been resolved: sysctl: always initialize i_uid/i_gid Always initialize i_uid/i_gid inside the sysfs core so set_ownership() can safely skip setting them. Commit 5ec27ec735ba ("fs/proc/proc_sysctl.c: fix the default values of i_uid/i_gid on /proc/sys inodes.") added defaults for i_uid/i_gid when set_ownership() was not implemented. It also missed adjusting net_ctl_set_ownership() to use the same default values in case the computation of a better value failed. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-42312? +

CVE-2024-42312 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-42312? +

CVE-2024-42312 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-42312? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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