CVE-2026-98212
Received
Received - Intake
Use-After-Free in Linux Kernel MMC HSQ
Vulnerability report for CVE-2026-98212, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-06
Last updated on: 2026-10-06
Assigner: kernel.org
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 6db96e5810e0a6a345b7d78549de7676ae5b2662 |
| Linux | Linux | 6db96e5810e0a6a345b7d78549de7676ae5b2662 |
| Linux | Linux | 6db96e5810e0a6a345b7d78549de7676ae5b2662 |
| Linux | Linux | 6db96e5810e0a6a345b7d78549de7676ae5b2662 |
| Linux | Linux | 6db96e5810e0a6a345b7d78549de7676ae5b2662 |
| Linux | Linux | 5.8 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
