CVEvulnerability
CVE-2026-98212
- Status
- Received
- Published
- 2026-10-06
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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.
References
- https://git.kernel.org/stable/c/45341b341642c377192c95e4d48e0a859cf85f42 git.kernel.org
- https://git.kernel.org/stable/c/5d132990475f02cfa1debe03d50b479432864ebd git.kernel.org
- https://git.kernel.org/stable/c/8439bf262ce3267bcfee29d3c61605f1731a2271 git.kernel.org
- https://git.kernel.org/stable/c/c50d6515bffb148c2c12be6d587ec201dfab4c34 git.kernel.org
- https://git.kernel.org/stable/c/df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67 git.kernel.org