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CVE-2024-35895 (GCVE-0-2024-35895)

Vulnerability from cvelistv5 – Published: 2024-05-19 08:34 – Updated: 2026-05-12 11:52
VLAI
Title
bpf, sockmap: Prevent lock inversion deadlock in map delete elem
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Prevent lock inversion deadlock in map delete elem syzkaller started using corpuses where a BPF tracing program deletes elements from a sockmap/sockhash map. Because BPF tracing programs can be invoked from any interrupt context, locks taken during a map_delete_elem operation must be hardirq-safe. Otherwise a deadlock due to lock inversion is possible, as reported by lockdep: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&host->lock); lock(&htab->buckets[i].lock); <Interrupt> lock(&host->lock); Locks in sockmap are hardirq-unsafe by design. We expects elements to be deleted from sockmap/sockhash only in task (normal) context with interrupts enabled, or in softirq context. Detect when map_delete_elem operation is invoked from a context which is _not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an error. Note that map updates are not affected by this issue. BPF verifier does not allow updating sockmap/sockhash from a BPF tracing program today.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-23 19:25 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < f7990498b05ac41f7d6a190dc0418ef1d21bf058 (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < dd54b48db0c822ae7b520bc80751f0a0a173ef75 (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < a44770fed86515eedb5a7c00b787f847ebb134a5 (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < 668b3074aa14829e2ac2759799537a93b60fef86 (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < 6af057ccdd8e7619960aca1f0428339f213b31cd (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < ff91059932401894e6c86341915615c5eb0eca48 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.274 , ≤ 5.4.* (semver)
Unaffected: 5.10.215 , ≤ 5.10.* (semver)
Unaffected: 5.15.154 , ≤ 5.15.* (semver)
Unaffected: 6.1.85 , ≤ 6.1.* (semver)
Unaffected: 6.6.26 , ≤ 6.6.* (semver)
Unaffected: 6.8.5 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
guessed Create a notification for this product.
Show details on NVD website
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Otherwise a deadlock due to lock inversion\\nis possible, as reported by lockdep:\\n\\n       CPU0                    CPU1\\n       ----                    ----\\n  lock(\u0026htab-\u003ebuckets[i].lock);\\n                               local_irq_disable();\\n                               lock(\u0026host-\u003elock);\\n                               lock(\u0026htab-\u003ebuckets[i].lock);\\n  \u003cInterrupt\u003e\\n    lock(\u0026host-\u003elock);\\n\\nLocks in sockmap are hardirq-unsafe by design. We expects elements to be\\ndeleted from sockmap/sockhash only in task (normal) context with interrupts\\nenabled, or in softirq context.\\n\\nDetect when map_delete_elem operation is invoked from a context which is\\n_not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an\\nerror.\\n\\nNote that map updates are not affected by this issue. BPF verifier does not\\nallow updating sockmap/sockhash from a BPF tracing program today.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf, sockmap: Evitar el punto muerto de inversi\u00f3n de bloqueo en la eliminaci\u00f3n del mapa elem syzkaller comenz\u00f3 a usar corpus donde un programa de seguimiento BPF elimina elementos de un mapa sockmap/sockhash. Debido a que los programas de seguimiento BPF se pueden invocar desde cualquier contexto de interrupci\u00f3n, los bloqueos realizados durante una operaci\u00f3n map_delete_elem deben ser seguros. De lo contrario, es posible que se produzca un punto muerto debido a la inversi\u00f3n del bloqueo, como lo informa lockdep: CPU0 CPU1 ---- ---- lock(\u0026amp;htab-\u0026gt;buckets[i].lock); local_irq_disable(); bloquear(\u0026amp;host-\u0026gt;bloquear); lock(\u0026amp;htab-\u0026gt;cubos[i].lock);  bloqueo(\u0026amp;host-\u0026gt;bloqueo); Los bloqueos en sockmap son dif\u00edciles de inseguro por dise\u00f1o. Esperamos que los elementos se eliminen de sockmap/sockhash solo en el contexto de la tarea (normal) con las interrupciones habilitadas o en el contexto de softirq. Detecta cu\u00e1ndo se invoca la operaci\u00f3n map_delete_elem desde un contexto que _no_ es hardirq-inseguro, es decir, las interrupciones est\u00e1n deshabilitadas y sale con un error. Tenga en cuenta que las actualizaciones de mapas no se ven afectadas por este problema. El verificador de BPF no permite actualizar sockmap/sockhash desde un programa de seguimiento de BPF en la actualidad.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/core/sock_map.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"604326b41a6fb9b4a78b6179335decee0365cd8c\",\"lessThan\":\"f7990498b05ac41f7d6a190dc0418ef1d21bf058\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"604326b41a6fb9b4a78b6179335decee0365cd8c\",\"lessThan\":\"dd54b48db0c822ae7b520bc80751f0a0a173ef75\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"604326b41a6fb9b4a78b6179335decee0365cd8c\",\"lessThan\":\"d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"604326b41a6fb9b4a78b6179335decee0365cd8c\",\"lessThan\":\"a44770fed86515eedb5a7c00b787f847ebb134a5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"604326b41a6fb9b4a78b6179335decee0365cd8c\",\"lessThan\":\"668b3074aa14829e2ac2759799537a93b60fef86\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"604326b41a6fb9b4a78b6179335decee0365cd8c\",\"lessThan\":\"6af057ccdd8e7619960aca1f0428339f213b31cd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"604326b41a6fb9b4a78b6179335decee0365cd8c\",\"lessThan\":\"ff91059932401894e6c86341915615c5eb0eca48\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/core/sock_map.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.20\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.274\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.215\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.154\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.85\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.26\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8.5\",\"lessThanOrEqual\":\"6.8.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.9\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T10:52:40+00:00",
      "cve": "CVE-2024-35895",
      "id": "CVE-2024-35895",
      "initial_release_date": "2024-05-19T00:00:00+00:00",
      "product_status:fixed": "1295",
      "product_status:known_affected": "112",
      "product_status:known_not_affected": "67",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bpf, sockmap: Prevent lock inversion deadlock in map delete elem",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-35895.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T01:31:11Z",
      "cve": "CVE-2024-35895",
      "id": "CVE-2024-35895",
      "initial_release_date": "2024-05-21T01:59:26Z",
      "product_status:known_affected": "33",
      "product_status:known_not_affected": "88",
      "product_status:recommended": "914",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-35895",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-35895.json",
      "version": "78"
    },
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\"versions\": [{\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"f7990498b05ac41f7d6a190dc0418ef1d21bf058\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"dd54b48db0c822ae7b520bc80751f0a0a173ef75\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"a44770fed86515eedb5a7c00b787f847ebb134a5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"668b3074aa14829e2ac2759799537a93b60fef86\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"6af057ccdd8e7619960aca1f0428339f213b31cd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"ff91059932401894e6c86341915615c5eb0eca48\", \"versionType\": \"git\"}], \"programFiles\": [\"net/core/sock_map.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.20\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.274\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.215\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.154\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.85\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.26\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/core/sock_map.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f7990498b05ac41f7d6a190dc0418ef1d21bf058\"}, {\"url\": \"https://git.kernel.org/stable/c/dd54b48db0c822ae7b520bc80751f0a0a173ef75\"}, {\"url\": \"https://git.kernel.org/stable/c/d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec\"}, {\"url\": \"https://git.kernel.org/stable/c/a44770fed86515eedb5a7c00b787f847ebb134a5\"}, {\"url\": \"https://git.kernel.org/stable/c/668b3074aa14829e2ac2759799537a93b60fef86\"}, {\"url\": \"https://git.kernel.org/stable/c/6af057ccdd8e7619960aca1f0428339f213b31cd\"}, {\"url\": \"https://git.kernel.org/stable/c/ff91059932401894e6c86341915615c5eb0eca48\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf, sockmap: Prevent lock inversion deadlock in map delete elem\\n\\nsyzkaller started using corpuses where a BPF tracing program deletes\\nelements from a sockmap/sockhash map. Because BPF tracing programs can be\\ninvoked from any interrupt context, locks taken during a map_delete_elem\\noperation must be hardirq-safe. Otherwise a deadlock due to lock inversion\\nis possible, as reported by lockdep:\\n\\n       CPU0                    CPU1\\n       ----                    ----\\n  lock(\u0026htab-\u003ebuckets[i].lock);\\n                               local_irq_disable();\\n                               lock(\u0026host-\u003elock);\\n                               lock(\u0026htab-\u003ebuckets[i].lock);\\n  \u003cInterrupt\u003e\\n    lock(\u0026host-\u003elock);\\n\\nLocks in sockmap are hardirq-unsafe by design. We expects elements to be\\ndeleted from sockmap/sockhash only in task (normal) context with interrupts\\nenabled, or in softirq context.\\n\\nDetect when map_delete_elem operation is invoked from a context which is\\n_not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an\\nerror.\\n\\nNote that map updates are not affected by this issue. BPF verifier does not\\nallow updating sockmap/sockhash from a BPF tracing program today.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.274\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.215\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.154\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.85\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.26\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.5\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"4.20\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:07:50.310Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-35895\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:07:50.310Z\", \"dateReserved\": \"2024-05-17T13:50:33.113Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-19T08:34:50.276Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.