CVE-2024-36971 (GCVE-0-2024-36971)

Vulnerability from cvelistv5 – Published: 2024-06-10 09:03 – Updated: 2025-11-04 17:21
VLAI?
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.
CWE
Assigner
Impacted 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)
Create a notification for this product.
    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)
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Show details on NVD website

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    "dateReserved": "2024-05-30T15:25:07.082Z",
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\"lessThan\": \"81dd3c82a456\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee8\", \"lessThan\": \"5af198c38712\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee8\", \"lessThan\": \"b8af8e6118a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a87cb3e48ee8\", \"lessThan\": \"92f1655aa2b2\", \"versionType\": \"git\"}], \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.6\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:4.19.316:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"4.19.316\", \"lessThan\": \"4.20\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:5.4.278:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.4.278\", \"lessThan\": \"5.5\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:5.10.219:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.10.219\", \"lessThan\": \"5.11\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:5.15.161:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.15.161\", \"lessThan\": \"5.16\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:6.1.94:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.1.94\", \"lessThan\": \"6.2\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:6.6.34:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.6.34\", \"lessThan\": \"6.7\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:6.9.4:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.9.4\", \"lessThan\": \"6.10\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:6.10:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"*\"}], \"defaultStatus\": \"affected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2024-08-07T00:00:00+00:00\", \"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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Sightings

Author Source Type Date

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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Detection rules are retrieved from Rulezet.

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