CVE-2026-89440mmc: via-sdmmc: stop card-detect handling on probe failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 63400da6cd37a9793c19bb6aed7131b58b975a04 builds before 5bb5327b92aae17e91c7228953c350a6ee3c94e8; from 0959cc1685eb19774300d43ef25e318b457b156b before d045596706d1b25d38af4a79980b017639fea9d1; from ba91b413983a9235792523c6b9f7ba2586c4d75d before 806409f12fdb14c9e4c56a64494c9b75f356cd49; from e4e46fb61e3bb4628170810d3f2b996b709b90d9 before dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02; from e4e46fb61e3bb4628170810d3f2b996b709b90d9 before efe7f25dd27e35063477b4b0e7eed3675669fd99; from e4e46fb61e3bb4628170810d3f2b996b709b90d9 before 2550f89589caad7402d618d7dffc038582c94b6b; from e4e46fb61e3bb4628170810d3f2b996b709b90d9 before c2b8a624911999399cc14822fec3e35032b3cee4; from e4e46fb61e3bb4628170810d3f2b996b709b90d9 before 088eaa92fcebaa6b957ccf9635afdf39643a577d; and 13 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/5bb5327b92aae17e91c7228953c350a6ee3c94e8
- https://git.kernel.org/stable/c/d045596706d1b25d38af4a79980b017639fea9d1
- https://git.kernel.org/stable/c/806409f12fdb14c9e4c56a64494c9b75f356cd49
- https://git.kernel.org/stable/c/dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02
- https://git.kernel.org/stable/c/efe7f25dd27e35063477b4b0e7eed3675669fd99
- https://git.kernel.org/stable/c/2550f89589caad7402d618d7dffc038582c94b6b
- https://git.kernel.org/stable/c/c2b8a624911999399cc14822fec3e35032b3cee4
- https://git.kernel.org/stable/c/088eaa92fcebaa6b957ccf9635afdf39643a577d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.