mmc: via-sdmmc: cancel card-detect work on remove
CVE-2026-89441 · published 11 Sept 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-89441?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to < 55d71c70f11d9f92c7d2653774001e98cb509deb, f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to < 0a3c70191868fb007c03ff79693ad4e4b3fdcbb8, f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to < f7ff3027ef004a331ef911a4886f12bc2e996037, f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to < eaca730c6f5e3609df62a0469fb789235a93d276
- Linux Linux: 2.6.31
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
mmc: via-sdmmc: cancel card-detect work on remove
Disabling the device interrupt and freeing the IRQ prevents new card-detect
work from being queued, but carddet_work already queued by the handler can
still run after via_sd_remove() returns. via_sdc_card_detect() recovers the
host through container_of() and dereferences its MMIO base; once remove()
returns the host can be freed, so that work would touch freed memory.
Cancel carddet_work after freeing the IRQ and before cancelling
finish_bh_work, which the card-detect handler can also queue. carddet_work
can re-enable the interrupt through via_reset_pcictrl(); mask it again
afterwards.
This issue was found by an in-house static analysis tool and confirmed by
manual code review.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/55d71c70f11d9f92c7d2653774001e98cb509deb
- git.kernel.org/stable/c/0a3c70191868fb007c03ff79693ad4e4b3fdcbb8
- git.kernel.org/stable/c/f7ff3027ef004a331ef911a4886f12bc2e996037
- git.kernel.org/stable/c/eaca730c6f5e3609df62a0469fb789235a93d276
- git.kernel.org/stable/c/57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON