CVE-2026-72424
Low risk· EPSS 8%Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
In the Linux kernel msc313 RTC driver, there is a NULL pointer dereference in the shared IRQ handler during probe. msc313_rtc_probe() calls devm_request_irq() with IRQF_SHARED and passes &pdev->dev as the cookie, but platform_set_drvdata() is called later. If another device on the same IRQ line triggers the handler in that window, the handler does dev_get_drvdata() on the cookie, gets NULL, and dereferences priv->rtc_base in interrupt context. The fix passes priv as the cookie directly so the handler reads it from dev_id without the lookup.
Risk Assessment
This may lead to system crash (kernel panic) or undefined behavior, especially in environments with shared interrupt lines.
Recommendation
Update the Linux kernel to a version with the fix, and check if other devices on the same IRQ line cause issues.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: rtc: msc313: fix NULL deref in shared IRQ handler at probe msc313_rtc_probe() calls devm_request_irq() with IRQF_SHARED and &pdev->dev as the cookie, but platform_set_drvdata() is only called later after the clock setup. With a shared IRQ line, another device on the same line can trigger the handler in that window. The handler does dev_get_drvdata() on the cookie, gets NULL, and dereferences priv->rtc_base in interrupt context. Pass priv as the cookie directly so the handler reads it from dev_id without the lookup, removing the dependency on probe order.