CVE-2026-98212

Summary

In the Linux kernel, the following vulnerability has been resolved:

mmc: hsq: Fix use-after-free in retry work

mmc_hsq_pump_requests() queues retry_work when request_atomic() returns -EBUSY; today sdhci-sprd is the only consumer that implements request_atomic(). The work is embedded in a devm-allocated mmc_hsq, but is never cancelled during driver removal. Work still pending at unbind can therefore run after the devm allocation has been released and dereference hsq->mmc and hsq->mrq.

Use devm_work_autocancel() to cancel and drain retry_work before the devm allocation is released. By the time devres cleanup begins, mmc_remove_host() has already stopped the host, so no new requests can arm the work.

This issue was found by an in-house static analysis tool.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux6db96e5810e0a6a345b7d78549de7676ae5b2662 < c50d6515bffb148c2c12be6d587ec201dfab4c34affected
LinuxLinux6db96e5810e0a6a345b7d78549de7676ae5b2662 < df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67affected
LinuxLinux6db96e5810e0a6a345b7d78549de7676ae5b2662 < 8439bf262ce3267bcfee29d3c61605f1731a2271affected
LinuxLinux6db96e5810e0a6a345b7d78549de7676ae5b2662 < 45341b341642c377192c95e4d48e0a859cf85f42affected
LinuxLinux6db96e5810e0a6a345b7d78549de7676ae5b2662 < 5d132990475f02cfa1debe03d50b479432864ebdaffected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References