CVE-2024-50262: linux kernel Memory Corruption — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix out-of-bounds write in trie_get_next_key() trie_get_next_key() allocates a node stack with size trie->max_prefixlen, while it writes (trie->max_prefixlen + 1) nodes to the stack when it has full paths from the root to leaves. For example, consider a trie with max_prefixlen is 8, and the nodes with key 0x00/0, 0x00/1, 0x00/2, ... 0x00/8 inserted. Subsequent calls to trie_get_next_key with _key with .prefixlen = 8 make 9 nodes be written on the node stack with size 8.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.16 — 4.19.323
linux	linux_kernel	4.20 — 5.4.285
linux	linux_kernel	5.5 — 5.10.229
linux	linux_kernel	5.11 — 5.15.171
linux	linux_kernel	5.16 — 6.1.116
linux	linux_kernel	6.2 — 6.6.60
linux	linux_kernel	6.7 — 6.11.7
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/13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21 https://git.kernel.org/stable/c/590976f921723d53ac199c01d5b7b73a94875e68 https://git.kernel.org/stable/c/86c8ebe02d8806dd8878d0063e8e185622ab6ea6 https://git.kernel.org/stable/c/90a6e0e1e151ef7a9282e78f54c3091de2dcc99c https://git.kernel.org/stable/c/91afbc0eb3c90258ae378ae3c6ead3d2371e926d https://git.kernel.org/stable/c/a035df0b98df424559fd383e8e1a268f422ea2ba https://git.kernel.org/stable/c/c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980 https://git.kernel.org/stable/c/e8494ac079814a53fbc2258d2743e720907488ed

Other References

https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html https://cert-portal.siemens.com/productcert/html/ssa-265688.html https://cert-portal.siemens.com/productcert/html/ssa-355557.html https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Frequently Asked Questions

What is CVE-2024-50262? +

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix out-of-bounds write in trie_get_next_key() trie_get_next_key() allocates a node stack with size trie->max_prefixlen, while it writes (trie->max_prefixlen + 1) nodes to the stack when it has full paths from the root to leaves. For example, consider a trie with max_prefixlen is 8, and the nodes with key 0x00/0, 0x00/1, 0x00/2, ... 0x00/8 inserted. Subsequent calls to trie_get_next_key with _key with .prefixlen = 8 make 9 nodes be written on the node stack with size 8. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-50262? +

CVE-2024-50262 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-50262? +

CVE-2024-50262 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-2024-50262? +

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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