CVE-2024-50262

bpf: Fix out-of-bounds write in trie_get_next_key()

State: Published
Severity: 7.8 High
Published: Nov 9, 2024
Updated: Oct 15, 2026
Reserved: Oct 21, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
LinuxLinux	b471f2f1de8b816f1e799b80aa92588f3566e4bd to before e8494ac079814a53fbc2258d2743e720907488edAffected b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 91afbc0eb3c90258ae378ae3c6ead3d2371e926dAffected b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 590976f921723d53ac199c01d5b7b73a94875e68Affected b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 86c8ebe02d8806dd8878d0063e8e185622ab6ea6Affected b471f2f1de8b816f1e799b80aa92588f3566e4bd to before a035df0b98df424559fd383e8e1a268f422ea2baAffected b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 90a6e0e1e151ef7a9282e78f54c3091de2dcc99cAffected b471f2f1de8b816f1e799b80aa92588f3566e4bd to before c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980Affected b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21Affected
LinuxLinux	4.16Affected before 4.16Not affected 4.19.323 through 4.19.Not affected 5.4.285 through 5.4.Not affected 5.10.229 through 5.10.Not affected 5.15.171 through 5.15.Not affected 6.1.116 through 6.1.Not affected 6.6.60 through 6.6.Not affected 6.11.7 through 6.11.*Not affected 6.12 and laterNot affected

Product

Versions

LinuxLinux

b471f2f1de8b816f1e799b80aa92588f3566e4bd to before e8494ac079814a53fbc2258d2743e720907488edAffected
b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 91afbc0eb3c90258ae378ae3c6ead3d2371e926dAffected
b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 590976f921723d53ac199c01d5b7b73a94875e68Affected
b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 86c8ebe02d8806dd8878d0063e8e185622ab6ea6Affected
b471f2f1de8b816f1e799b80aa92588f3566e4bd to before a035df0b98df424559fd383e8e1a268f422ea2baAffected
b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 90a6e0e1e151ef7a9282e78f54c3091de2dcc99cAffected
b471f2f1de8b816f1e799b80aa92588f3566e4bd to before c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980Affected
b471f2f1de8b816f1e799b80aa92588f3566e4bd to before 13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21Affected

LinuxLinux

4.16Affected
before 4.16Not affected
4.19.323 through 4.19.*Not affected
5.4.285 through 5.4.*Not affected
5.10.229 through 5.10.*Not affected
5.15.171 through 5.15.*Not affected
6.1.116 through 6.1.*Not affected
6.6.60 through 6.6.*Not affected
6.11.7 through 6.11.*Not affected
6.12 and laterNot affected

References

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