CVE-2024-36971

Published Jun 10, 2024

Last updated 7 months ago

Exploit knownCVSS high 7.8
Ubuntu

Overview

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.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Analyzed
Products
debian_linux, linux_kernel

Risk scores

CVSS 3.1

Type
Primary
Base score
7.8
Impact score
5.9
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

Known exploits

Data from CISA

Vulnerability name
Android Kernel Remote Code Execution Vulnerability
Exploit added on
Aug 7, 2024
Exploit action due
Aug 28, 2024
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Weaknesses

nvd@nist.gov
CWE-416
134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-416

Social media

Hype score
Not currently trending

  1. Google has released security updates addressing a zero-day vulnerability (CVE-2024-36971) affecting: https://t.co/9xrzbMC2Jq

    @linux_ly

    7 Dec 2024

    20 Impressions

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  2. Google has released security updates addressing a zero-day vulnerability (CVE-2024-36971) affecting: https://t.co/9xrzbMC2Jq

    @linux_ly

    28 Oct 2024

    44 Impressions

    0 Retweets

    1 Like

    0 Bookmarks

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    1 Quote

  3. Google Patches New Android Kernel Vulnerability Exploited in the Wild Google has addressed a high-severity security flaw impacting the Android kernel that it has been actively exploited in the wild. The vulnerability, tracked as CVE-2024-36971, has bee... https://t.co/97CBD3g2md

    @SecurityAid

    25 Oct 2024

    12 Impressions

    0 Retweets

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    0 Quotes

Configurations

Related CVEs

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References

Sources include official advisories and independent security research.