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CVE-2024-36971

net: fix __dst_negative_advice() race

CVSS 3.1 High 7.8Known exploited (CISA KEV)

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

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.

Official description from the CVE record, published by Linux. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.1 High 7.8

Score published by Linux in the CVE record.

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

  • Attack vector: Local

    The attacker needs local access to the system, or to trick a user into running something.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: Low

    A basic user account is needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS 3.1 High 7.8

Score published by CISA-ADP in the CVE record.

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

  • Attack vector: Local

    The attacker needs local access to the system, or to trick a user into running something.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: Low

    A basic user account is needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.02701 (2.7% probability)
Percentile
86.1%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.
Name in the catalog
Android Kernel Remote Code Execution Vulnerability
Added to the catalog
Aug 7, 2024
Federal due date
Aug 28, 2024

CISA assessment as of Aug 8, 2024

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Exploitation
Recorded by CISA as active
Automatable
no
Technical impact
total

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.

Affected products

Products listed in the CVE record, as the CNA published them.

  • Linux

    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before 051c0bde9f0450a2ec3d62a86d2a0d2fad117f13
    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before db0082825037794c5dba9959c9de13ca34cc5e72
    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before 2295a7ef5c8c49241bff769e7826ef2582e532a6
    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before eacb8b195579c174a6d3e12a9690b206eb7f28cf
    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before 81dd3c82a456b0015461754be7cb2693991421b4
    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before 5af198c387128a9d2ddd620b0f0803564a4d4508
    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before b8af8e6118a6605f0e495a58d591ca94a85a50fc
    • affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 up to before 92f1655aa2b2294d0b49925f3b875a634bd3b59e

  • Linux

    • affected: 4.6
    • unaffected: before 4.6
    • unaffected: 4.19.316 up to 4.19.*
    • unaffected: 5.4.278 up to 5.4.*
    • unaffected: 5.10.219 up to 5.10.*
    • unaffected: 5.15.161 up to 5.15.*
    • unaffected: 6.1.94 up to 6.1.*
    • unaffected: 6.6.34 up to 6.6.*
    • unaffected: 6.9.4 up to 6.9.*
    • unaffected: 6.10 up to *

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Added to CISA KEV
  4. Record last updated

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:23 UTC. Sources and licenses