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CVE-2022-48735 (GCVE-0-2022-48735)

Vulnerability from cvelistv5 – Published: 2024-06-20 11:13 – Updated: 2026-08-05 08:52
VLAI
Title
ALSA: hda: Fix UAF of leds class devs at unbinding
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: Fix UAF of leds class devs at unbinding The LED class devices that are created by HD-audio codec drivers are registered via devm_led_classdev_register() and associated with the HD-audio codec device. Unfortunately, it turned out that the devres release doesn't work for this case; namely, since the codec resource release happens before the devm call chain, it triggers a NULL dereference or a UAF for a stale set_brightness_delay callback. For fixing the bug, this patch changes the LED class device register and unregister in a manual manner without devres, keeping the instances in hda_gen_spec.
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: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:10 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 15509b6344726de22bdbfff88b65341dd0dd33af , < a7de1002135cf94367748ffc695a29812d7633b5 (git)
Affected: 15509b6344726de22bdbfff88b65341dd0dd33af , < 0e629052f013eeb61494d4df2f1f647c2a9aef47 (git)
Affected: 15509b6344726de22bdbfff88b65341dd0dd33af , < 813e9f3e06d22e29872d4fd51b54992d89cf66c8 (git)
Affected: 15509b6344726de22bdbfff88b65341dd0dd33af , < 549f8ffc7b2f7561bea7f90930b6c5104318e87b (git)
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Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.10.99 , ≤ 5.10.* (semver)
Unaffected: 5.15.22 , ≤ 5.15.* (semver)
Unaffected: 5.16.8 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:47:39+00:00",
      "cve": "CVE-2022-48735",
      "id": "CVE-2022-48735",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "286",
      "product_status:known_affected": "58",
      "product_status:known_not_affected": "22",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ALSA: hda: Fix UAF of leds class devs at unbinding",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-48735.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-08-29T02:32:40Z",
      "cve": "CVE-2022-48735",
      "id": "CVE-2022-48735",
      "initial_release_date": "2024-06-22T04:09:18Z",
      "product_status:known_affected": "362",
      "product_status:known_not_affected": "118",
      "product_status:recommended": "433",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-48735",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-48735.json",
      "version": "58"
    },
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Unfortunately, it turned out that the devres\\nrelease doesn\u0027t work for this case; namely, since the codec resource\\nrelease happens before the devm call chain, it triggers a NULL\\ndereference or a UAF for a stale set_brightness_delay callback.\\n\\nFor fixing the bug, this patch changes the LED class device register\\nand unregister in a manual manner without devres, keeping the\\ninstances in hda_gen_spec.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.99\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.22\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16.8\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17\", \"versionStartIncluding\": \"5.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:52:02.428Z\"}}}",
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  }
}



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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.