CVE-2022-50322 (GCVE-0-2022-50322)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:48 – Updated: 2025-09-16 08:02
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. msc313_rtc_probe() was passing clk_disable_unprepare() directly, which did not have matching prototypes for devm_add_action_or_reset()'s callback argument. Refactor to use devm_clk_get_enabled() instead. This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: be7d9c9161b9c76edeff15e79edc2f256568fe05 , < 5affaaf3334c9274131dae889ed79ea0553d61b4 (git)
Affected: be7d9c9161b9c76edeff15e79edc2f256568fe05 , < ba50fee6b41bcbafaeed3c51f90d37d1480ff9a0 (git)
Affected: be7d9c9161b9c76edeff15e79edc2f256568fe05 , < 21b8a1dd56a163825e5749b303858fb902ebf198 (git)
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    Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.0.17 , ≤ 6.0.* (semver)
Unaffected: 6.1.3 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: msc313: Fix function prototype mismatch in msc313_rtc_probe()\n\nWith clang\u0027s kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),\nindirect call targets are validated against the expected function\npointer prototype to make sure the call target is valid to help mitigate\nROP attacks. If they are not identical, there is a failure at run time,\nwhich manifests as either a kernel panic or thread getting killed.\n\nmsc313_rtc_probe() was passing clk_disable_unprepare() directly, which\ndid not have matching prototypes for devm_add_action_or_reset()\u0027s\ncallback argument. Refactor to use devm_clk_get_enabled() instead.\n\nThis was found as a result of Clang\u0027s new -Wcast-function-type-strict\nflag, which is more sensitive than the simpler -Wcast-function-type,\nwhich only checks for type width mismatches."
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    "dateReserved": "2025-09-15T14:18:36.814Z",
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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.
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  • 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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