CVE-2024-50196 (GCVE-0-2024-50196)

Vulnerability from cvelistv5 – Published: 2024-11-08 05:54 – Updated: 2026-05-11 20:47
VLAI
Title
pinctrl: ocelot: fix system hang on level based interrupts
Summary
In the Linux kernel, the following vulnerability has been resolved: pinctrl: ocelot: fix system hang on level based interrupts The current implementation only calls chained_irq_enter() and chained_irq_exit() if it detects pending interrupts. ``` for (i = 0; i < info->stride; i++) { uregmap_read(info->map, id_reg + 4 * i, &reg); if (!reg) continue; chained_irq_enter(parent_chip, desc); ``` However, in case of GPIO pin configured in level mode and the parent controller configured in edge mode, GPIO interrupt might be lowered by the hardware. In the result, if the interrupt is short enough, the parent interrupt is still pending while the GPIO interrupt is cleared; chained_irq_enter() never gets called and the system hangs trying to service the parent interrupt. Moving chained_irq_enter() and chained_irq_exit() outside the for loop ensures that they are called even when GPIO interrupt is lowered by the hardware. The similar code with chained_irq_enter() / chained_irq_exit() functions wrapping interrupt checking loop may be found in many other drivers: ``` grep -r -A 10 chained_irq_enter drivers/pinctrl ```
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f , < 655f5d4662b958122b260be05aa6dfdf8768efe6 (git)
Affected: ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f , < 4a81800ef05bea5a9896f199677f7b7f5020776a (git)
Affected: ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f , < 20728e86289ab463b99b7ab4425515bd26aba417 (git)
Affected: ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f , < dcbe9954634807ec54e22bde278b5b269f921381 (git)
Affected: ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f , < 93b8ddc54507a227087c60a0013ed833b6ae7d3c (git)
Create a notification for this product.
Linux Linux Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 5.15.169 , ≤ 5.15.* (semver)
Unaffected: 6.1.114 , ≤ 6.1.* (semver)
Unaffected: 6.6.58 , ≤ 6.6.* (semver)
Unaffected: 6.11.5 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: ocelot: fix system hang on level based interrupts\n\nThe current implementation only calls chained_irq_enter() and\nchained_irq_exit() if it detects pending interrupts.\n\n```\nfor (i = 0; i \u003c info-\u003estride; i++) {\n\turegmap_read(info-\u003emap, id_reg + 4 * i, \u0026reg);\n\tif (!reg)\n\t\tcontinue;\n\n\tchained_irq_enter(parent_chip, desc);\n```\n\nHowever, in case of GPIO pin configured in level mode and the parent\ncontroller configured in edge mode, GPIO interrupt might be lowered by the\nhardware. In the result, if the interrupt is short enough, the parent\ninterrupt is still pending while the GPIO interrupt is cleared;\nchained_irq_enter() never gets called and the system hangs trying to\nservice the parent interrupt.\n\nMoving chained_irq_enter() and chained_irq_exit() outside the for loop\nensures that they are called even when GPIO interrupt is lowered by the\nhardware.\n\nThe similar code with chained_irq_enter() / chained_irq_exit() functions\nwrapping interrupt checking loop may be found in many other drivers:\n```\ngrep -r -A 10 chained_irq_enter drivers/pinctrl\n```"
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In the result, if the interrupt is short enough, the parent\\ninterrupt is still pending while the GPIO interrupt is cleared;\\nchained_irq_enter() never gets called and the system hangs trying to\\nservice the parent interrupt.\\n\\nMoving chained_irq_enter() and chained_irq_exit() outside the for loop\\nensures that they are called even when GPIO interrupt is lowered by the\\nhardware.\\n\\nThe similar code with chained_irq_enter() / chained_irq_exit() functions\\nwrapping interrupt checking loop may be found in many other drivers:\\n```\\ngrep -r -A 10 chained_irq_enter drivers/pinctrl\\n```\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: pinctrl: ocelot: arregla el bloqueo del sistema en interrupciones basadas en niveles La implementaci\u00f3n actual solo llama a chained_irq_enter() y chained_irq_exit() si detecta interrupciones pendientes. ``` for (i = 0; i \u0026lt; info-\u0026gt;stride; i++) { uregmap_read(info-\u0026gt;map, id_reg + 4 * i, \u00ae); if (!reg) continue; chained_irq_enter(parent_chip, desc); ``` Sin embargo, en el caso de que el pin GPIO est\u00e9 configurado en modo de nivel y el controlador principal est\u00e9 configurado en modo de borde, el hardware puede reducir la interrupci\u00f3n GPIO. Como resultado, si la interrupci\u00f3n es lo suficientemente corta, la interrupci\u00f3n principal sigue pendiente mientras se borra la interrupci\u00f3n GPIO; chained_irq_enter() nunca se llama y el sistema se cuelga al intentar dar servicio a la interrupci\u00f3n principal. Mover chained_irq_enter() y chained_irq_exit() fuera del bucle for garantiza que se llamen incluso cuando el hardware reduce la interrupci\u00f3n GPIO. El c\u00f3digo similar con las funciones chained_irq_enter() / chained_irq_exit() que envuelven el bucle de verificaci\u00f3n de interrupciones se puede encontrar en muchos otros controladores: ``` grep -r -A 10 chained_irq_enter drivers/pinctrl 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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-50196\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T20:17:59.256112Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-754\", \"description\": \"CWE-754 Improper Check for Unusual or Exceptional Conditions\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T15:21:30.876Z\"}}], \"cna\": {\"title\": \"pinctrl: ocelot: fix system hang on level based interrupts\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f\", \"lessThan\": \"655f5d4662b958122b260be05aa6dfdf8768efe6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f\", \"lessThan\": \"4a81800ef05bea5a9896f199677f7b7f5020776a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f\", \"lessThan\": \"20728e86289ab463b99b7ab4425515bd26aba417\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f\", \"lessThan\": \"dcbe9954634807ec54e22bde278b5b269f921381\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ce8dc0943357a5d10b05dcf0556b537c1d7b8b1f\", \"lessThan\": \"93b8ddc54507a227087c60a0013ed833b6ae7d3c\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/pinctrl/pinctrl-ocelot.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.16\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.16\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.169\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.114\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.58\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/pinctrl/pinctrl-ocelot.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/655f5d4662b958122b260be05aa6dfdf8768efe6\"}, {\"url\": \"https://git.kernel.org/stable/c/4a81800ef05bea5a9896f199677f7b7f5020776a\"}, {\"url\": \"https://git.kernel.org/stable/c/20728e86289ab463b99b7ab4425515bd26aba417\"}, {\"url\": \"https://git.kernel.org/stable/c/dcbe9954634807ec54e22bde278b5b269f921381\"}, {\"url\": \"https://git.kernel.org/stable/c/93b8ddc54507a227087c60a0013ed833b6ae7d3c\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\npinctrl: ocelot: fix system hang on level based interrupts\\n\\nThe current implementation only calls chained_irq_enter() and\\nchained_irq_exit() if it detects pending interrupts.\\n\\n```\\nfor (i = 0; i \u003c info-\u003estride; i++) {\\n\\turegmap_read(info-\u003emap, id_reg + 4 * i, \u0026reg);\\n\\tif (!reg)\\n\\t\\tcontinue;\\n\\n\\tchained_irq_enter(parent_chip, desc);\\n```\\n\\nHowever, in case of GPIO pin configured in level mode and the parent\\ncontroller configured in edge mode, GPIO interrupt might be lowered by the\\nhardware. In the result, if the interrupt is short enough, the parent\\ninterrupt is still pending while the GPIO interrupt is cleared;\\nchained_irq_enter() never gets called and the system hangs trying to\\nservice the parent interrupt.\\n\\nMoving chained_irq_enter() and chained_irq_exit() outside the for loop\\nensures that they are called even when GPIO interrupt is lowered by the\\nhardware.\\n\\nThe similar code with chained_irq_enter() / chained_irq_exit() functions\\nwrapping interrupt checking loop may be found in many other drivers:\\n```\\ngrep -r -A 10 chained_irq_enter drivers/pinctrl\\n```\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.169\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.114\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.58\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.5\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"4.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:48:27.703Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50196\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T20:27:07.754Z\", \"dateReserved\": \"2024-10-21T19:36:19.968Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-08T05:54:10.949Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.