mmc: hsq: Fix use-after-free in retry work
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.158, 6.12.112, 6.18.54, 7.2.8
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 6db96e5810e0a6a345b7d78549de7676ae5b2662 · fixed in c50d6515bffb148c2c12be6d587ec201dfab4c34; From 6db96e5810e0a6a345b7d78549de7676ae5b2662 · fixed in df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67; From 6db96e5810e0a6a345b7d78549de7676ae5b2662 · fixed in 8439bf262ce3267bcfee29d3c61605f1731a2271; From 6db96e5810e0a6a345b7d78549de7676ae5b2662 · fixed in 45341b341642c377192c95e4d48e0a859cf85f42; From 6db96e5810e0a6a345b7d78549de7676ae5b2662 · fixed in 5d132990475f02cfa1debe03d50b479432864ebd
- Linux Linux
5.8
- KernelLinux
From 5.8.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.54; From 6.19.0 · fixed in 7.2.8