CVE-2026-98212

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

State: Published
Severity: Not scored
Published: Oct 6, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6db96e5810e0a6a345b7d78549de7676ae5b2662 to before c50d6515bffb148c2c12be6d587ec201dfab4c34Affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 to before df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67Affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 to before 8439bf262ce3267bcfee29d3c61605f1731a2271Affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 to before 45341b341642c377192c95e4d48e0a859cf85f42Affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 to before 5d132990475f02cfa1debe03d50b479432864ebdAffected
LinuxLinux	5.8Affected before 5.8Not affected 6.6.158 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.54 through 6.18.Not affected 7.2.8 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

6db96e5810e0a6a345b7d78549de7676ae5b2662 to before c50d6515bffb148c2c12be6d587ec201dfab4c34Affected
6db96e5810e0a6a345b7d78549de7676ae5b2662 to before df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67Affected
6db96e5810e0a6a345b7d78549de7676ae5b2662 to before 8439bf262ce3267bcfee29d3c61605f1731a2271Affected
6db96e5810e0a6a345b7d78549de7676ae5b2662 to before 45341b341642c377192c95e4d48e0a859cf85f42Affected
6db96e5810e0a6a345b7d78549de7676ae5b2662 to before 5d132990475f02cfa1debe03d50b479432864ebdAffected

LinuxLinux

5.8Affected
before 5.8Not affected
6.6.158 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.54 through 6.18.*Not affected
7.2.8 through 7.2.*Not affected
7.3 and laterNot affected

References

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