CVE-2023-52596 (GCVE-0-2023-52596)

Vulnerability from cvelistv5 – Published: 2024-03-06 06:45 – Updated: 2026-05-11 19:30
VLAI
Title
sysctl: Fix out of bounds access for empty sysctl registers
Summary
In the Linux kernel, the following vulnerability has been resolved: sysctl: Fix out of bounds access for empty sysctl registers When registering tables to the sysctl subsystem there is a check to see if header is a permanently empty directory (used for mounts). This check evaluates the first element of the ctl_table. This results in an out of bounds evaluation when registering empty directories. The function register_sysctl_mount_point now passes a ctl_table of size 1 instead of size 0. It now relies solely on the type to identify a permanently empty register. Make sure that the ctl_table has at least one element before testing for permanent emptiness.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9edbfe92a0a1355bae1e47c8f542ac0d39f19f8c , < 15893975e9e382f8294ea8d926f08dc2d8d39ede (git)
Affected: 9edbfe92a0a1355bae1e47c8f542ac0d39f19f8c , < 2ae7081bc10123b187e36a4f3a8e53768de31489 (git)
Affected: 9edbfe92a0a1355bae1e47c8f542ac0d39f19f8c , < 315552310c7de92baea4e570967066569937a843 (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.16 , ≤ 6.6.* (semver)
Unaffected: 6.7.4 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/15893975e9e382f8294ea8d926f08dc2d8d39ede\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2ae7081bc10123b187e36a4f3a8e53768de31489\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/315552310c7de92baea4e570967066569937a843\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T23:03:21.269Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52596\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-06T15:39:37.053752Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:11.807Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"sysctl: Fix out of bounds access for empty sysctl registers\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"9edbfe92a0a1355bae1e47c8f542ac0d39f19f8c\", \"lessThan\": \"15893975e9e382f8294ea8d926f08dc2d8d39ede\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9edbfe92a0a1355bae1e47c8f542ac0d39f19f8c\", \"lessThan\": \"2ae7081bc10123b187e36a4f3a8e53768de31489\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9edbfe92a0a1355bae1e47c8f542ac0d39f19f8c\", \"lessThan\": \"315552310c7de92baea4e570967066569937a843\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/proc/proc_sysctl.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/proc/proc_sysctl.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/15893975e9e382f8294ea8d926f08dc2d8d39ede\"}, {\"url\": \"https://git.kernel.org/stable/c/2ae7081bc10123b187e36a4f3a8e53768de31489\"}, {\"url\": \"https://git.kernel.org/stable/c/315552310c7de92baea4e570967066569937a843\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsysctl: Fix out of bounds access for empty sysctl registers\\n\\nWhen registering tables to the sysctl subsystem there is a check to see\\nif header is a permanently empty directory (used for mounts). This check\\nevaluates the first element of the ctl_table. This results in an out of\\nbounds evaluation when registering empty directories.\\n\\nThe function register_sysctl_mount_point now passes a ctl_table of size\\n1 instead of size 0. It now relies solely on the type to identify\\na permanently empty register.\\n\\nMake sure that the ctl_table has at least one element before testing for\\npermanent emptiness.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.16\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.4\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"6.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:30:01.402Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52596\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:30:01.402Z\", \"dateReserved\": \"2024-03-02T21:55:42.571Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-06T06:45:26.094Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





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.