CVE-2022-48636 (GCVE-0-2022-48636)

Vulnerability from cvelistv5 – Published: 2024-04-28 12:59 – Updated: 2026-05-11 18:44
VLAI
Title
s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < d86b4267834e6d4af62e3073e48166e349ab1b70 (git)
Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < 49f401a98b318761ca2e15d4c7869a20043fbed4 (git)
Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < aaba5ff2742043705bc4c02fd0b2b246e2e16da1 (git)
Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < 2e473351400e3dd66f0b71eddcef82ee45a584c1 (git)
Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20b (git)
Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < d3a67c21b18f33c79382084af556557c442f12a6 (git)
Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < 650a2e79d176db753654d3dde88e53a2033036ac (git)
Affected: 8e09f21574ea3028d5629e5de759e0b196c690c5 , < db7ba07108a48c0f95b74fabbfd5d63e924f992d (git)
Create a notification for this product.
Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 4.9.330 , ≤ 4.9.* (semver)
Unaffected: 4.14.295 , ≤ 4.14.* (semver)
Unaffected: 4.19.260 , ≤ 4.19.* (semver)
Unaffected: 5.4.215 , ≤ 5.4.* (semver)
Unaffected: 5.10.146 , ≤ 5.10.* (semver)
Unaffected: 5.15.71 , ≤ 5.15.* (semver)
Unaffected: 5.19.12 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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Therefore there is a race window\\nbetween dasd_alias_get_start_dev() and _lcu_update() which sets\\npavgroup to NULL with the lcu-\u003elock held.\\n\\nFix by checking the pavgroup pointer with lcu-\u003elock held.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: s390/dasd: corrige Ups en dasd_alias_get_start_dev debido a la falta de pavgroup. Corrige Ups en la funci\u00f3n dasd_alias_get_start_dev() causada porque el puntero pavgroup es NULL. El puntero pavgroup se verifica en la entrada de la funci\u00f3n pero sin que se mantenga presionado el bloqueo lcu-\u0026gt;. Por lo tanto, existe una ventana de ejecuci\u00f3n entre dasd_alias_get_start_dev() y _lcu_update() que establece pavgroup en NULL con el bloqueo lcu-\u0026gt;retenido. 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      "cveMetadata": "{\"cveId\": \"CVE-2022-48636\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T18:44:12.215Z\", \"dateReserved\": \"2024-02-25T13:44:28.315Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-28T12:59:28.858Z\", \"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.