$ cve CVE-2024-36971 JSON

CVE-2024-36971 KEV

7.8

HIGH · CVSS 3.1 · EPSS 2.7% (pctl 85)

Patch first

On CISA KEV — known exploited in the wild, due 2024-08-28.

Description

In the Linux kernel, the following vulnerability has been resolved: net: fix __dst_negative_advice() race __dst_negative_advice() does not enforce proper RCU rules when sk->dst_cache must be cleared, leading to possible UAF. RCU rules are that we must first clear sk->sk_dst_cache, then call dst_release(old_dst). Note that sk_dst_reset(sk) is implementing this protocol correctly, while __dst_negative_advice() uses the wrong order. Given that ip6_negative_advice() has special logic against RTF_CACHE, this means each of the three ->negative_advice() existing methods must perform the sk_dst_reset() themselves. Note the check against NULL dst is centralized in __dst_negative_advice(), there is no need to duplicate it in various callbacks. Many thanks to Clement Lecigne for tracking this issue. This old bug became visible after the blamed commit, using UDP sockets.

Scoring

CVSS	7.8 (HIGH, v3.1)
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS	2.7% — more likely to be exploited than 85% of all CVEs
Weakness	CWE-416
On CISA KEV	yes — remediate by 2024-08-28
Public exploit	none known
Published	2024-06-10
Last modified	2026-06-17

CISA KEV

Name	Android Kernel Remote Code Execution Vulnerability
Added	2024-08-07
Due	2024-08-28
Vendor / product	Android / Kernel
Ransomware use	none reported

Affected (2)

Vendor	Product
debian	debian linux
linux	linux kernel

References

→ the Explorer · watch your stack · NVD