CVE-2026-89440High· 7.8▾ TwilightIn 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 5.8
none → medium
— → 5.8
none → medium
— → 7.8
none → high
7.8 → 5.8
high → medium
7.8 → 7
Last analysed / modified upstream
7 → 7.8
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.
Linux >= 63400da6cd37a9793c19bb6aed7131b58b975a04 < 5bb5327b92aae17e91c7228953c350a6ee3c94e8Linux >= 0959cc1685eb19774300d43ef25e318b457b156b < d045596706d1b25d38af4a79980b017639fea9d1Linux >= ba91b413983a9235792523c6b9f7ba2586c4d75d < 806409f12fdb14c9e4c56a64494c9b75f356cd49Linux >= e4e46fb61e3bb4628170810d3f2b996b709b90d9 < dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02Linux >= e4e46fb61e3bb4628170810d3f2b996b709b90d9 < efe7f25dd27e35063477b4b0e7eed3675669fd99Linux >= e4e46fb61e3bb4628170810d3f2b996b709b90d9 < 2550f89589caad7402d618d7dffc038582c94b6bLinux >= e4e46fb61e3bb4628170810d3f2b996b709b90d9 < c2b8a624911999399cc14822fec3e35032b3cee4Linux >= e4e46fb61e3bb4628170810d3f2b996b709b90d9 < 088eaa92fcebaa6b957ccf9635afdf39643a577dLinux 076bcd2c93e16b05c10564e299d6e5d26a766d00Linux 12b8e81b77c05c658efd9cde3585bbd65ae39b59Linux 95025a8dd0ec015872f6c16473fe04d6264e68caLinux f59ef2a47a228e51322ad76752a55a8917c56e38Linux 0ec94795114edc7e24ec71849dce42bfa61dafa3Linux >= 5.10.163 < 5.10.270Linux >= 5.15.86 < 5.15.221Linux >= 6.1.2 < 6.1.188Linux >= 4.9.337 < 4.10Linux >= 4.14.303 < 4.15Linux >= 4.19.270 < 4.20Linux >= 5.4.229 < 5.5Linux >= 6.0.16 < 6.1Linux 6.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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