mmc: via-sdmmc: cancel card-detect work on remove (CVE-2026-89441) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89441

mmc: via-sdmmc: cancel card-detect work on remove

Answer in brief

CVE-2026-89441 records a Unknown severity vulnerability in mmc: via-sdmmc: cancel card-detect work on remove. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <f7ff3027ef004a331ef911a4886f12bc2e996037 \|\| >=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <eaca730c6f5e3609df62a0469fb789235a93d276 \|\| >=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5	f7ff3027ef004a331ef911a4886f12bc2e996037, eaca730c6f5e3609df62a0469fb789235a93d276, 57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5
Linux/Linuxgeneric	2.6.31	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to f7ff3027ef004a331ef911a4886f12bc2e996037 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.