CVE-2024-36903: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix potential uninit-value access in __ip6_make_skb() As it was done in commit fc1092f51567 ("ipv4: Fix uninit-value access in __ip_make_skb()") for IPv4, check FLOWI_FLAG_KNOWN_NH on fl6->flowi6_flags instead of testing HDRINCL on the socket to avoid a race condition which causes uninit-value access.

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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	4.14.313 — 4.15
linux	linux_kernel	4.19.281 — 4.20
linux	linux_kernel	5.4.241 — 5.5
linux	linux_kernel	5.10.178 — 5.11
linux	linux_kernel	5.15.107 — 5.16
linux	linux_kernel	6.1.24 — 6.2
linux	linux_kernel	6.2.11 — 6.6.31
linux	linux_kernel	6.7 — 6.8.10
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/2367bf254f3a27ecc6e229afd7a8b0a1395f7be3 https://git.kernel.org/stable/c/4e13d3a9c25b7080f8a619f961e943fe08c2672c https://git.kernel.org/stable/c/68c8ba16ab712eb709c6bab80ff151079d11d97a https://git.kernel.org/stable/c/2367bf254f3a27ecc6e229afd7a8b0a1395f7be3 https://git.kernel.org/stable/c/4e13d3a9c25b7080f8a619f961e943fe08c2672c https://git.kernel.org/stable/c/68c8ba16ab712eb709c6bab80ff151079d11d97a

Other References

https://git.kernel.org/stable/c/40e5444a3ac315b60e94d82226b73cd82145d09e https://git.kernel.org/stable/c/59d74c843ebf46264c7903726cf6f2673a93b07a https://git.kernel.org/stable/c/a05c1ede50e9656f0752e523c7b54f3a3489e9a8 https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

Frequently Asked Questions

What is CVE-2024-36903? +

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix potential uninit-value access in __ip6_make_skb() As it was done in commit fc1092f51567 ("ipv4: Fix uninit-value access in __ip_make_skb()") for IPv4, check FLOWI_FLAG_KNOWN_NH on fl6->flowi6_flags instead of testing HDRINCL on the socket to avoid a race condition which causes uninit-value access. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-36903? +

CVE-2024-36903 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-2024-36903? +

CVE-2024-36903 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-2024-36903? +

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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CVE-2024-36903