CVE-2024-36971
Confirmed PUBLISHEDnet: fix __dst_negative_advice() race
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Jun 10, 2024
- Exploitation Reported
- Aug 07, 2024
- CVSS
- 7.8 High
- EPSS
- 2.7%
Affected Versions
92 version rows · page 1 of 4
| Vendor | Product | Version | Status |
|---|---|---|---|
| linux |
linux_kernel
|
4.6 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 051c0bde9f04 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < db0082825037 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 2295a7ef5c8c |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < eacb8b195579 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 81dd3c82a456 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 5af198c38712 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < b8af8e6118a6 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 92f1655aa2b2 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 051c0bde9f04 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < db0082825037 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 2295a7ef5c8c |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < eacb8b195579 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 81dd3c82a456 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 5af198c38712 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < b8af8e6118a6 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 92f1655aa2b2 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 051c0bde9f04 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < db0082825037 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 2295a7ef5c8c |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < eacb8b195579 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 81dd3c82a456 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 5af198c38712 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < b8af8e6118a6 |
Affected |
| linux |
linux_kernel
|
a87cb3e48ee8 to < 92f1655aa2b2 |
Affected |
CVE References
- git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad1... git.kernel.org · CVE Record https://git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad117f13
- git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34c... git.kernel.org · CVE Record https://git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34cc5e72
- git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e... git.kernel.org · CVE Record https://git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e532a6
- git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7... git.kernel.org · CVE Record https://git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7f28cf
- git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991... git.kernel.org · CVE Record https://git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991421b4
Show 3 more references
- git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4... git.kernel.org · CVE Record https://git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4d4508
- git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a85... git.kernel.org · CVE Record https://git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a85a50fc
- git.kernel.org/stable/c/92f1655aa2b2294d0b49925f3b875a634bd... git.kernel.org · CVE Record https://git.kernel.org/stable/c/92f1655aa2b2294d0b49925f3b875a634bd3b59e
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2024-08-07 00:00 UTC |
| CVE | 2026-06-05 09:46 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2024-08-07 00:00:00 UTC · CISA
Weaknesses (CWE)
-
Use After Free
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/215599 | Jun 02, 2025 |
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
09:46 UTC about 1 month ago09:46 UTC · about 1 month ago
KEV confirmed by CVE
Exploitation attested by an external source
-
09:26 UTC about 1 year ago09:26 UTC · about 1 year ago
Nessus plugin available
Scanner coverage available
-
00:00 UTC almost 2 years ago00:00 UTC · almost 2 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
09:03 UTC about 2 years ago09:03 UTC · about 2 years ago
CVE published
Vulnerability disclosed publicly
-
15:25 UTC about 2 years ago15:25 UTC · about 2 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2024-36971
{
"cve_id": "CVE-2024-36971",
"title": "net: fix __dst_negative_advice() race",
"affected_vendor": "Linux",
"affected_product": "Linux",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 7.8,
"epss_score": 0.02701,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}