--- title: "CVE-2024-36971: net: fix __dst_negative_advice() race | CubePath" description: "In the Linux kernel, the following vulnerability has been resolved: net: fix __dst_negative_advice() race __dst_negative_advice() does not enforce proper…" language: en source: https://cubepath.com/security/cve/CVE-2024-36971 --- # CVE-2024-36971: net: fix __dst_negative_advice() race | CubePath ## 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](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2024-36971) ## 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 | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | 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 | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | 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](https://www.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](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-416](https://cwe.mitre.org/data/definitions/416.html) Use After Free ## 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. - [git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad1…](https://git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad117f13) - [git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34c…](https://git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34cc5e72) - [git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e…](https://git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e532a6) - [git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7…](https://git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7f28cf) - [git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991…](https://git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991421b4) - [git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4…](https://git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4d4508) - [git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a85…](https://git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a85a50fc) - [git.kernel.org/stable/c/92f1655aa2b2294d0b49925f3b875a634bd…](https://git.kernel.org/stable/c/92f1655aa2b2294d0b49925f3b875a634bd3b59e) - [lists.debian.org/debian-lts-announce/2024/06/msg00020.html](https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html) ## Timeline 1. ID reserved May 30, 2024 2. Record published Jun 10, 2024 3. Added to CISA KEV Aug 7, 2024 4. Record last updated Aug 5, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) 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](https://cubepath.com/security/cve/legal)