CVE-2026-23063 (GCVE-0-2026-23063)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:07 – Updated: 2026-02-09 08:38
VLAI?
Title
uacce: ensure safe queue release with state management
Summary
In the Linux kernel, the following vulnerability has been resolved: uacce: ensure safe queue release with state management Directly calling `put_queue` carries risks since it cannot guarantee that resources of `uacce_queue` have been fully released beforehand. So adding a `stop_queue` operation for the UACCE_CMD_PUT_Q command and leaving the `put_queue` operation to the final resource release ensures safety. Queue states are defined as follows: - UACCE_Q_ZOMBIE: Initial state - UACCE_Q_INIT: After opening `uacce` - UACCE_Q_STARTED: After `start` is issued via `ioctl` When executing `poweroff -f` in virt while accelerator are still working, `uacce_fops_release` and `uacce_remove` may execute concurrently. This can cause `uacce_put_queue` within `uacce_fops_release` to access a NULL `ops` pointer. Therefore, add state checks to prevent accessing freed pointers.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 015d239ac0142ad0e26567fd890ef8d171f13709 , < b457abeb5d962db88aaf60e249402fd3073dbfab (git)
Affected: 015d239ac0142ad0e26567fd890ef8d171f13709 , < 8b57bf1d3b1db692f34bce694a03e41be79f6016 (git)
Affected: 015d239ac0142ad0e26567fd890ef8d171f13709 , < 336fb41a186e7c0415ae94fec9e23d1f04b87483 (git)
Affected: 015d239ac0142ad0e26567fd890ef8d171f13709 , < 43f233eb6e7b9d88536881a9bc43726d0e34800d (git)
Affected: 015d239ac0142ad0e26567fd890ef8d171f13709 , < 47634d70073890c9c37e39ab4ff93d4b585b028a (git)
Affected: 015d239ac0142ad0e26567fd890ef8d171f13709 , < 92e4f11e29b98ef424ff72d6371acac03e5d973c (git)
Affected: 015d239ac0142ad0e26567fd890ef8d171f13709 , < 26c08dabe5475d99a13f353d8dd70e518de45663 (git)
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    Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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So adding a `stop_queue` operation for the\\nUACCE_CMD_PUT_Q command and leaving the `put_queue` operation to\\nthe final resource release ensures safety.\\n\\nQueue states are defined as follows:\\n- UACCE_Q_ZOMBIE: Initial state\\n- UACCE_Q_INIT: After opening `uacce`\\n- UACCE_Q_STARTED: After `start` is issued via `ioctl`\\n\\nWhen executing `poweroff -f` in virt while accelerator are still\\nworking, `uacce_fops_release` and `uacce_remove` may execute\\nconcurrently. This can cause `uacce_put_queue` within\\n`uacce_fops_release` to access a NULL `ops` pointer. Therefore, add\\nstate checks to prevent accessing freed pointers.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nuacce: asegurar la liberaci\u00f3n segura de la cola con gesti\u00f3n de estado\\n\\nLlamar directamente a \u0027put_queue\u0027 conlleva riesgos ya que no puede garantizar que los recursos de \u0027uacce_queue\u0027 hayan sido completamente liberados de antemano. Por lo tanto, a\u00f1adir una operaci\u00f3n \u0027stop_queue\u0027 para el comando UACCE_CMD_PUT_Q y dejar la operaci\u00f3n \u0027put_queue\u0027 para la liberaci\u00f3n final de recursos garantiza la seguridad.\\n\\nLos estados de la cola se definen de la siguiente manera:\\n- UACCE_Q_ZOMBIE: Estado inicial\\n- UACCE_Q_INIT: Despu\u00e9s de abrir \u0027uacce\u0027\\n- UACCE_Q_STARTED: Despu\u00e9s de que se emite \u0027start\u0027 a trav\u00e9s de \u0027ioctl\u0027\\n\\nAl ejecutar \u0027poweroff -f\u0027 en virt mientras el acelerador sigue funcionando, \u0027uacce_fops_release\u0027 y \u0027uacce_remove\u0027 pueden ejecutarse concurrentemente. Esto puede causar que \u0027uacce_put_queue\u0027 dentro de \u0027uacce_fops_release\u0027 acceda a un puntero \u0027ops\u0027 NULL. Por lo tanto, a\u00f1adir comprobaciones de estado para evitar acceder a punteros liberados.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.7\",\"versionEndExcluding\":\"5.10.249\",\"matchCriteriaId\":\"5B635197-F169-4155-A953-A712BDD15376\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.199\",\"matchCriteriaId\":\"A247FBA6-BEB9-484F-B892-DD5517949CCD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.162\",\"matchCriteriaId\":\"6579E0D4-0641-479D-A4C3-0EF618798C55\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.122\",\"matchCriteriaId\":\"8EAAE395-0162-4BAF-9AD5-E9AF3C869C4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.68\",\"matchCriteriaId\":\"52F38E19-0FDD-4992-9D6D-D4169D689598\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.8\",\"matchCriteriaId\":\"E65C6E79-7EBE-4C77-93F0-818CF5B38F4E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/26c08dabe5475d99a13f353d8dd70e518de45663\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/336fb41a186e7c0415ae94fec9e23d1f04b87483\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/43f233eb6e7b9d88536881a9bc43726d0e34800d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/47634d70073890c9c37e39ab4ff93d4b585b028a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8b57bf1d3b1db692f34bce694a03e41be79f6016\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/92e4f11e29b98ef424ff72d6371acac03e5d973c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b457abeb5d962db88aaf60e249402fd3073dbfab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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Sightings

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  • 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.