Vulnerability-Lookup

FKIE_CVE-2024-36883

Vulnerability from fkie_nvd - Published: 2024-05-30 16:15 - Updated: 2026-01-22 20:24

Severity ?

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net: fix out-of-bounds access in ops_init net_alloc_generic is called by net_alloc, which is called without any locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It is read twice, first to allocate an array, then to set s.len, which is later used to limit the bounds of the array access. It is possible that the array is allocated and another thread is registering a new pernet ops, increments max_gen_ptrs, which is then used to set s.len with a larger than allocated length for the variable array. Fix it by reading max_gen_ptrs only once in net_alloc_generic. If max_gen_ptrs is later incremented, it will be caught in net_assign_generic.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c3248bc708a7797be573214065cf908ff1f54c7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2d60ff5874aefd006717ca5e22ac1e25eac29c42	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3cdc34d76c4f777579e28ad373979d36c030cfd3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a26ff37e624d12e28077e5b24d2b264f62764ad6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f4f94587e1bf87cb40ec33955a9d90148dd026ab	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/0c3248bc708a7797be573214065cf908ff1f54c7	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/2d60ff5874aefd006717ca5e22ac1e25eac29c42	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/3cdc34d76c4f777579e28ad373979d36c030cfd3	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/a26ff37e624d12e28077e5b24d2b264f62764ad6	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/f4f94587e1bf87cb40ec33955a9d90148dd026ab	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.netapp.com/advisory/ntap-20241018-0001/	Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	3.3
linux	linux_kernel	3.3
linux	linux_kernel	3.3
linux	linux_kernel	3.3
linux	linux_kernel	3.3
linux	linux_kernel	3.3
linux	linux_kernel	3.3
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
linux	linux_kernel	6.9
debian	debian_linux	10.0

JSON

To clipboard

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix out-of-bounds access in ops_init\n\nnet_alloc_generic is called by net_alloc, which is called without any\nlocking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It\nis read twice, first to allocate an array, then to set s.len, which is\nlater used to limit the bounds of the array access.\n\nIt is possible that the array is allocated and another thread is\nregistering a new pernet ops, increments max_gen_ptrs, which is then used\nto set s.len with a larger than allocated length for the variable array.\n\nFix it by reading max_gen_ptrs only once in net_alloc_generic. If\nmax_gen_ptrs is later incremented, it will be caught in net_assign_generic."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: corrige el acceso fuera de los l\u00edmites en ops_init net_alloc_generic es llamado por net_alloc, que se llama sin ning\u00fan bloqueo. Lee max_gen_ptrs, que se modifica en pernet_ops_rwsem. Se lee dos veces, primero para asignar una matriz y luego para configurar s.len, que luego se usa para limitar los l\u00edmites del acceso a la matriz. Es posible que la matriz est\u00e9 asignada y otro subproceso est\u00e9 registrando nuevas operaciones de pernet, incrementa max_gen_ptrs, que luego se usa para configurar s.len con una longitud mayor que la asignada para la matriz de variables. Solucionelo leyendo max_gen_ptrs solo una vez en net_alloc_generic. Si max_gen_ptrs se incrementa posteriormente, quedar\u00e1 atrapado en net_assign_generic."
    }
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  "id": "CVE-2024-36883",
  "lastModified": "2026-01-22T20:24:01.197",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
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          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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}

CVE-2024-36883 (GCVE-0-2024-36883)

Vulnerability from cvelistv5 – Published: 2024-05-30 15:28 – Updated: 2025-05-04 12:56

Title

net: fix out-of-bounds access in ops_init

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3cdc34d76c4f77757…
	https://git.kernel.org/stable/c/7b0e64583eab8c1d8…
	https://git.kernel.org/stable/c/0c3248bc708a7797b…
	https://git.kernel.org/stable/c/9518b79bfd2fbf99f…
	https://git.kernel.org/stable/c/2d60ff5874aefd006…
	https://git.kernel.org/stable/c/b6dbfd5bcc267a95a…
	https://git.kernel.org/stable/c/f4f94587e1bf87cb4…
	https://git.kernel.org/stable/c/a26ff37e624d12e28…

Impacted products

Vendor

Product

Version

Linux

Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < 3cdc34d76c4f777579e28ad373979d36c030cfd3 (git)
Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < 7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f (git)
Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < 0c3248bc708a7797be573214065cf908ff1f54c7 (git)
Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < 9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030 (git)
Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < 2d60ff5874aefd006717ca5e22ac1e25eac29c42 (git)
Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd (git)
Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < f4f94587e1bf87cb40ec33955a9d90148dd026ab (git)
Affected: 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 , < a26ff37e624d12e28077e5b24d2b264f62764ad6 (git)
Affected: 561331eae0a03d0c4cf60f3cf485aa3e8aa5ab48 (git)
Affected: a2c82f7bee1ffa9eafa1fb0bd886a7eea8c9e497 (git)

Linux

Affected: 3.3
Unaffected: 0 , < 3.3 (semver)
Unaffected: 4.19.314 , ≤ 4.19.* (semver)
Unaffected: 5.4.276 , ≤ 5.4.* (semver)
Unaffected: 5.10.217 , ≤ 5.10.* (semver)
Unaffected: 5.15.159 , ≤ 5.15.* (semver)
Unaffected: 6.1.91 , ≤ 6.1.* (semver)
Unaffected: 6.6.31 , ≤ 6.6.* (semver)
Unaffected: 6.8.10 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)

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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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2024-36883

CVE-2024-36883 (GCVE-0-2024-36883)

Tags

Sightings

Nomenclature