Linux Kernel RTC MPFS: Unchecked devm_clk_get() Error Pointer Crash
CVE-2026-98825 Published on October 18, 2026
rtc: mpfs: fix unchecked devm_clk_get() error pointer in probe()
In the Linux kernel, the following vulnerability has been resolved:
rtc: mpfs: fix unchecked devm_clk_get() error pointer in probe()
devm_clk_get(&pdev->dev, "rtcref")'s return value was passed straight
into clk_get_rate() without checking it for an error first, unlike the
"rtc" clock a few lines above which is correctly checked with
IS_ERR(). clk_get_rate() only guards against a NULL clk, not an error
pointer:
if (!clk)
return 0;
...
rate = clk_core_get_rate_recalc(clk->core);
so if devm_clk_get() ever returns an error pointer here (for example
ERR_PTR(-EPROBE_DEFER), which is the normal, expected outcome if the
clkcfg clock-provider this RTC depends on has not registered its
clocks yet by the time this driver probes), clk_get_rate() dereferences
that error pointer instead of returning 0, crashing instead of letting
probe defer.
Capture the clock in the existing 'clk' local and check it with
IS_ERR() before calling clk_get_rate(), matching the handling already
used for the "rtc" clock in this same function.
Products Associated with CVE-2026-98825
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Affected Versions
Linux:- Version 0b31d703598dc1993867597bbd45e87d824fc427 and below 74dc7c52946e3d47c40edd0875adb7cc15937066 is affected.
- Version 0b31d703598dc1993867597bbd45e87d824fc427 and below cfd70c9b19846c524f2b6195a7484bdf22071ccf is affected.
- Version 0b31d703598dc1993867597bbd45e87d824fc427 and below 8a03f8422fa08eed335c51bccb612a3d81739ff2 is affected.
- Version 0b31d703598dc1993867597bbd45e87d824fc427 and below ac41b05d15db3134e839148290d67415ee0bdb58 is affected.
- Version 6.0 is affected.
- Before 6.0 is unaffected.
- Version 6.12.113, <= 6.12.* is unaffected.
- Version 6.18.56, <= 6.18.* is unaffected.
- Version 7.2.10, <= 7.2.* is unaffected.
- Version 7.3-rc6, <= * is unaffected.