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CVE-2026-72424

rtc: msc313: fix NULL deref in shared IRQ handler at probe PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected be7d9c9161b9c76edeff15e79edc2f256568fe05 before ece7b9ffde23e2ccd7567761ac27463ded43932c; affected be7d9c9161b9c76edeff15e79edc2f256568fe05 before 52c73b6992b46ed476590ed526faa033d4fbfc5d; affected be7d9c9161b9c76edeff15e79edc2f256568fe05 before bc1f61a9b97d65de21c2681bcf0b5b1392c58486; affected be7d9c9161b9c76edeff15e79edc2f256568fe05 before 1f6a4aec0d36647eb2f67cd69db22bd28cabe2cb; affected be7d9c9161b9c76edeff15e79edc2f256568fe05 before bb3e624808c981fe881cb79037be63e680ed7d38; affected be7d9c9161b9c76edeff15e79edc2f256568fe05 before a369f48be8de426a7d2bca18dbd46c2ad1138803
Linux / Linuxaffected 5.16; unaffected 0 before 5.16; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through *

CWE

No CWE identifiers supplied.

References