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.

Classification

CVE ID: CVE-2024-50262

CVSS Base Severity: LOW

CVSS Base Score: 0.0

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/e8494ac079814a53fbc2258d2743e720907488ed
https://git.kernel.org/stable/c/91afbc0eb3c90258ae378ae3c6ead3d2371e926d
https://git.kernel.org/stable/c/590976f921723d53ac199c01d5b7b73a94875e68
https://git.kernel.org/stable/c/86c8ebe02d8806dd8878d0063e8e185622ab6ea6
https://git.kernel.org/stable/c/a035df0b98df424559fd383e8e1a268f422ea2ba
https://git.kernel.org/stable/c/90a6e0e1e151ef7a9282e78f54c3091de2dcc99c
https://git.kernel.org/stable/c/c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980
https://git.kernel.org/stable/c/13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21

Timeline