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

Vulnerability from cvelistv5 – Published: 2024-11-08 05:54 – Updated: 2025-11-03 22:26
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
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)
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    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)
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Sightings

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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.



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