CVE-2026-89440

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89440

Key Details

CVE	CVE-2026-89440
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

mmc: via-sdmmc: stop card-detect handling on probe failure

request_irq() registers the SD card-detect interrupt and the probe enables

it before mmc_add_host() runs. If mmc_add_host() fails, the error path only

unmaps the registers and returns: the interrupt stays registered, so the

handler keeps running against the host once it is freed. via_sdc_isr()

dereferences sdhost and its MMIO base and schedules carddet_work, which

via_sdc_card_detect() also runs against freed memory through its

container_of() dereference.

Add a probe-error path that disables and frees the interrupt and cancels

carddet_work before unmapping. carddet_work can re-enable the device

interrupt via via_reset_pcictrl(), which restores PCIINTCTRL, so mask it

again after cancelling the work.

This issue was found by an in-house static analysis tool and confirmed by

manual code review. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89440
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89440

Source

Reference

NVD

CVE