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CVE-2023-52983 (GCVE-0-2023-52983)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2026-08-05 09:12
VLAI
Title
block, bfq: fix uaf for bfqq in bic_set_bfqq()
Summary
In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bic_set_bfqq() After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"), bic->bfqq will be accessed in bic_set_bfqq(), however, in some context bic->bfqq will be freed, and bic_set_bfqq() is called with the freed bic->bfqq. Fix the problem by always freeing bfqq after bic_set_bfqq().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-27 16:59 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a , < 7f77f3dab5066a7c9da73d72d1eee895ff84a8d5 (git)
Affected: 094f3d9314d67691cb21ba091c1b528f6e3c4893 , < 511c922c5bf6c8a166bea826e702336bc2424140 (git)
Affected: 761564d93c8265f65543acf0a576b32d66bfa26a , < cb1876fc33af26d00efdd473311f1b664c77c44e (git)
Affected: 64dc8c732f5c2b406cc752e6aaa1bd5471159cab , < b600de2d7d3a16f9007fad1bdae82a3951a26af2 (git)
Affected: b22fd72bfebda3956efc4431b60ddfc0a51e03e0 (git)
Affected: 6.0.16 , < 6.1 (semver)
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Linux Linux Affected: 5.15.86 , < 5.15.93 (semver)
Affected: 6.1.2 , < 6.1.11 (semver)
guessed Create a notification for this product.
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Despu\u00e9s del commit 64dc8c732f5c (\\\"block, bfq: correcci\u00f3n de posible uaf para \u0027bfqq-\u0026gt;bic\u0027\\\"), se acceder\u00e1 a bic-\u0026gt;bfqq en bic_set_bfqq(). Sin embargo, en algunos contextos, se liberar\u00e1 bic-\u0026gt;bfqq y se llamar\u00e1 a bic_set_bfqq() con el bic-\u0026gt;bfqq liberado. 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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52983\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-27T16:59:42.552227Z\"}}}], \"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\": \"2025-03-27T16:59:43.887Z\"}}], \"cna\": {\"title\": \"block, bfq: fix uaf for bfqq in bic_set_bfqq()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a\", \"lessThan\": \"7f77f3dab5066a7c9da73d72d1eee895ff84a8d5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"094f3d9314d67691cb21ba091c1b528f6e3c4893\", \"lessThan\": \"511c922c5bf6c8a166bea826e702336bc2424140\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"761564d93c8265f65543acf0a576b32d66bfa26a\", \"lessThan\": \"cb1876fc33af26d00efdd473311f1b664c77c44e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"64dc8c732f5c2b406cc752e6aaa1bd5471159cab\", \"lessThan\": \"b600de2d7d3a16f9007fad1bdae82a3951a26af2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b22fd72bfebda3956efc4431b60ddfc0a51e03e0\", \"versionType\": \"git\"}], \"programFiles\": [\"block/bfq-cgroup.c\", \"block/bfq-iosched.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.15.86\", \"lessThan\": \"5.15.93\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.1.2\", \"lessThan\": \"6.1.11\", \"versionType\": \"semver\"}], \"programFiles\": [\"block/bfq-cgroup.c\", \"block/bfq-iosched.c\"], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7f77f3dab5066a7c9da73d72d1eee895ff84a8d5\"}, {\"url\": \"https://git.kernel.org/stable/c/511c922c5bf6c8a166bea826e702336bc2424140\"}, {\"url\": \"https://git.kernel.org/stable/c/cb1876fc33af26d00efdd473311f1b664c77c44e\"}, {\"url\": \"https://git.kernel.org/stable/c/b600de2d7d3a16f9007fad1bdae82a3951a26af2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock, bfq: fix uaf for bfqq in bic_set_bfqq()\\n\\nAfter commit 64dc8c732f5c (\\\"block, bfq: fix possible uaf for \u0027bfqq-\u003ebic\u0027\\\"),\\nbic-\u003ebfqq will be accessed in bic_set_bfqq(), however, in some context\\nbic-\u003ebfqq will be freed, and bic_set_bfqq() is called with the freed\\nbic-\u003ebfqq.\\n\\nFix the problem by always freeing bfqq after bic_set_bfqq().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.93\", \"versionStartIncluding\": \"5.15.86\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.11\", \"versionStartIncluding\": \"6.1.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.0.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:36:22.378Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52983\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:36:22.378Z\", \"dateReserved\": \"2025-03-27T16:40:15.740Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-03-27T16:43:21.372Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.