CVE-2024-40996 (GCVE-0-2024-40996)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:37 – Updated: 2025-11-03 21:59
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Avoid splat in pskb_pull_reason syzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug hint in pskb_may_pull. We'd like to retain this debug check because it might hint at integer overflows and other issues (kernel code should pull headers, not huge value). In bpf case, this splat isn't interesting at all: such (nonsensical) bpf programs are typically generated by a fuzzer anyway. Do what Eric suggested and suppress such warning. For CONFIG_DEBUG_NET=n we don't need the extra check because pskb_may_pull will do the right thing: return an error without the WARN() backtrace.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8af60bb2b215f478b886f1d6d302fefa7f0b917d , < dacc15e9cb248d19e5fc63c54bef0b9b55007761 (git)
Affected: 1b2b26595bb09febf14c5444c873ac4ec90a5a77 , < 7f9644782c559635bd676c12c59389a34ed7c866 (git)
Affected: 219eee9c0d16f1b754a8b85275854ab17df0850a , < 5e90258303a358e88737afb5048bee9113beea3a (git)
Affected: 219eee9c0d16f1b754a8b85275854ab17df0850a , < 2bbe3e5a2f4ef69d13be54f1cf895b4658287080 (git)
Affected: fff05b2b004d9a8a2416d08647f3dc9068e357c8 (git)
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    Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.1.96 , ≤ 6.1.* (semver)
Unaffected: 6.6.36 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-07-15T06:53:01.968Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Avoid splat in pskb_pull_reason\\n\\nsyzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug\\nhint in pskb_may_pull.\\n\\nWe\u0027d like to retain this debug check because it might hint at integer\\noverflows and other issues (kernel code should pull headers, not huge\\nvalue).\\n\\nIn bpf case, this splat isn\u0027t interesting at all: such (nonsensical)\\nbpf programs are typically generated by a fuzzer anyway.\\n\\nDo what Eric suggested and suppress such warning.\\n\\nFor CONFIG_DEBUG_NET=n we don\u0027t need the extra check because\\npskb_may_pull will do the right thing: return an error without the\\nWARN() backtrace.\"}], \"affected\": [{\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"unaffected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"net/core/filter.c\"], \"versions\": [{\"version\": \"8af60bb2b215\", \"lessThan\": \"dacc15e9cb24\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1b2b26595bb0\", \"lessThan\": \"7f9644782c55\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"219eee9c0d16\", \"lessThan\": \"5e90258303a3\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"219eee9c0d16\", \"lessThan\": \"2bbe3e5a2f4e\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"net/core/filter.c\"], \"versions\": [{\"version\": \"6.9\", \"status\": \"affected\"}, {\"version\": \"0\", \"lessThan\": \"6.9\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.1.96\", \"lessThanOrEqual\": \"6.1.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.6.36\", \"lessThanOrEqual\": \"6.6.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.9.7\", \"lessThanOrEqual\": \"6.9.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.10\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761\"}, {\"url\": \"https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866\"}, {\"url\": \"https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3a\"}, {\"url\": \"https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080\"}], \"title\": \"bpf: Avoid splat in pskb_pull_reason\", \"x_generator\": {\"engine\": \"bippy-c9c4e1df01b2\"}}, \"adp\": [{\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-40996\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T17:01:32.111725Z\"}}}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2024-09-11T12:42:22.021Z\"}, \"title\": \"CISA ADP Vulnrichment\"}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40996\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2024-07-12T12:17:45.607Z\", \"datePublished\": \"2024-07-12T12:37:38.454Z\", \"dateUpdated\": \"2024-08-02T04:39:56.075Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • 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.



Detection rules are retrieved from Rulezet.