CVE-2024-36971 (GCVE-0-2024-36971)
Vulnerability from cvelistv5 – Published: 2024-06-10 09:03 – Updated: 2026-05-11 20:18
VLAI?
CISA KEV
Title
net: fix __dst_negative_advice() race
Summary
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.
Severity ?
7.8 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < 051c0bde9f0450a2ec3d62a86d2a0d2fad117f13
(git)
Affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < db0082825037794c5dba9959c9de13ca34cc5e72 (git) Affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < 2295a7ef5c8c49241bff769e7826ef2582e532a6 (git) Affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < eacb8b195579c174a6d3e12a9690b206eb7f28cf (git) Affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < 81dd3c82a456b0015461754be7cb2693991421b4 (git) Affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < 5af198c387128a9d2ddd620b0f0803564a4d4508 (git) Affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < b8af8e6118a6605f0e495a58d591ca94a85a50fc (git) Affected: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 , < 92f1655aa2b2294d0b49925f3b875a634bd3b59e (git) |
|
| Linux | Linux |
Affected:
4.6
Unaffected: 0 , < 4.6 (semver) Unaffected: 4.19.316 , ≤ 4.19.* (semver) Unaffected: 5.4.278 , ≤ 5.4.* (semver) Unaffected: 5.10.219 , ≤ 5.10.* (semver) Unaffected: 5.15.161 , ≤ 5.15.* (semver) Unaffected: 6.1.94 , ≤ 6.1.* (semver) Unaffected: 6.6.34 , ≤ 6.6.* (semver) Unaffected: 6.9.4 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix) |
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: aac91036-d01c-4510-af88-5958708ad6a9
Exploited: Yes
Timestamps
First Seen: 2024-08-07
Asserted: 2024-08-07
Scope
Notes: KEV entry: Android Kernel Remote Code Execution Vulnerability | Affected: Android / Kernel | Description: Android contains an unspecified vulnerability in the kernel that allows for remote code execution. This vulnerability resides in Linux Kernel and could impact other products, including but not limited to Android OS. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2024-08-28 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://source.android.com/docs/security/bulletin/2024-08-01, https://lore.kernel.org/linux-cve-announce/20240610090330.1347021-2-lee@kernel.org/T/#u ; https://nvd.nist.gov/vuln/detail/CVE-2024-36971
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-416 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Kernel |
| Due Date | 2024-08-28 |
| Date Added | 2024-08-07 |
| Vendorproject | Android |
| Vulnerabilityname | Android Kernel Remote Code Execution Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 12:26 UTC
| Updated: 2026-02-06 07:17 UTC
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Las reglas de RCU son que primero debemos borrar sk-\u0026gt;sk_dst_cache y luego llamar a dst_release(old_dst). Tenga en cuenta que sk_dst_reset(sk) implementa este protocolo correctamente, mientras que __dst_negative_advice() utiliza el orden incorrecto. Dado que ip6_negative_advice() tiene una l\u00f3gica especial contra RTF_CACHE, esto significa que cada uno de los tres -\u0026gt;negative_advice() m\u00e9todos existentes debe realizar sk_dst_reset() ellos mismos. Tenga en cuenta que la verificaci\u00f3n de NULL dst est\u00e1 centralizada en __dst_negative_advice(), no es necesario duplicarla en varias devoluciones de llamada. Muchas gracias a Clement Lecigne por dar seguimiento a este problema. Este antiguo error se hizo visible despu\u00e9s de la confirmaci\u00f3n culpada, utilizando sockets 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\"time\": \"2024-08-07T00:00:00.000Z\", \"value\": \"CVE-2024-36971 added to CISA KEV\"}], \"references\": [{\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-36971\", \"tags\": [\"government-resource\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-06T17:00:13.363Z\"}}], \"cna\": {\"title\": \"net: fix __dst_negative_advice() race\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"051c0bde9f0450a2ec3d62a86d2a0d2fad117f13\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"db0082825037794c5dba9959c9de13ca34cc5e72\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"2295a7ef5c8c49241bff769e7826ef2582e532a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"eacb8b195579c174a6d3e12a9690b206eb7f28cf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"81dd3c82a456b0015461754be7cb2693991421b4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"5af198c387128a9d2ddd620b0f0803564a4d4508\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"b8af8e6118a6605f0e495a58d591ca94a85a50fc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314\", \"lessThan\": \"92f1655aa2b2294d0b49925f3b875a634bd3b59e\", \"versionType\": \"git\"}], \"programFiles\": [\"include/net/dst_ops.h\", \"include/net/sock.h\", \"net/ipv4/route.c\", \"net/ipv6/route.c\", \"net/xfrm/xfrm_policy.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.316\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.278\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.219\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.161\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.94\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.34\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/net/dst_ops.h\", \"include/net/sock.h\", \"net/ipv4/route.c\", \"net/ipv6/route.c\", \"net/xfrm/xfrm_policy.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad117f13\"}, {\"url\": \"https://git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34cc5e72\"}, {\"url\": \"https://git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e532a6\"}, {\"url\": \"https://git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7f28cf\"}, {\"url\": \"https://git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991421b4\"}, {\"url\": \"https://git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4d4508\"}, {\"url\": \"https://git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a85a50fc\"}, {\"url\": \"https://git.kernel.org/stable/c/92f1655aa2b2294d0b49925f3b875a634bd3b59e\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: fix __dst_negative_advice() race\\n\\n__dst_negative_advice() does not enforce proper RCU rules when\\nsk-\u003edst_cache must be cleared, leading to possible UAF.\\n\\nRCU rules are that we must first clear sk-\u003esk_dst_cache,\\nthen call dst_release(old_dst).\\n\\nNote that sk_dst_reset(sk) is implementing this protocol correctly,\\nwhile __dst_negative_advice() uses the wrong order.\\n\\nGiven that ip6_negative_advice() has special logic\\nagainst RTF_CACHE, this means each of the three -\u003enegative_advice()\\nexisting methods must perform the sk_dst_reset() themselves.\\n\\nNote the check against NULL dst is centralized in\\n__dst_negative_advice(), there is no need to duplicate\\nit in various callbacks.\\n\\nMany thanks to Clement Lecigne for tracking this issue.\\n\\nThis old bug became visible after the blamed commit, using UDP sockets.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.316\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.278\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.219\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.161\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.94\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.34\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.4\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"4.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:13:06.632Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2024-36971\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T17:21:17.010Z\", \"dateReserved\": \"2024-05-30T15:25:07.082Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-10T09:03:23.878Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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