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CVE-2026-89440

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 4.10, 4.15, and 7 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 63400da6cd37a9793c19bb6aed7131b58b975a04 · fixed in 5bb5327b92aae17e91c7228953c350a6ee3c94e8; From 0959cc1685eb19774300d43ef25e318b457b156b · fixed in d045596706d1b25d38af4a79980b017639fea9d1; From ba91b413983a9235792523c6b9f7ba2586c4d75d · fixed in 806409f12fdb14c9e4c56a64494c9b75f356cd49; From e4e46fb61e3bb4628170810d3f2b996b709b90d9 · fixed in dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02; From e4e46fb61e3bb4628170810d3f2b996b709b90d9 · fixed in efe7f25dd27e35063477b4b0e7eed3675669fd99; From e4e46fb61e3bb4628170810d3f2b996b709b90d9 · fixed in 2550f89589caad7402d618d7dffc038582c94b6b; From e4e46fb61e3bb4628170810d3f2b996b709b90d9 · fixed in c2b8a624911999399cc14822fec3e35032b3cee4; From e4e46fb61e3bb4628170810d3f2b996b709b90d9 · fixed in 088eaa92fcebaa6b957ccf9635afdf39643a577d; From 5.10.163 · fixed in 5.10.270; From 5.15.86 · fixed in 5.15.221; From 6.1.2 · fixed in 6.1.188; From 4.9.337 · fixed in 4.10; From 4.14.303 · fixed in 4.15; From 4.19.270 · fixed in 4.20; From 5.4.229 · fixed in 5.5; From 6.0.16 · fixed in 6.1

  • Linux Linux

    6.2

  • KernelLinux

    fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; fixed in 6.12.109; From 6.7.0 · fixed in 6.18.50; From 6.13.0 · fixed in 7.2.4

References 8

git.kernel.org