mmc: via-sdmmc: stop card-detect handling on probe failure
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.
CVE-2026-89440
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89440
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "63400da6cd37a9793c19bb6aed7131b58b975a04",
"lessThan": "5bb5327b92aae17e91c7228953c350a6ee3c94e8",
"versionType": "git"
},
{
"status": "affected",
"version": "0959cc1685eb19774300d43ef25e318b457b156b",
"lessThan": "d045596706d1b25d38af4a79980b017639fea9d1",
"versionType": "git"
},
{
"status": "affected",
"version": "ba91b413983a9235792523c6b9f7ba2586c4d75d",
"lessThan": "806409f12fdb14c9e4c56a64494c9b75f356cd49",
"versionType": "git"
},
{
"status": "affected",
"version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
"lessThan": "dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02",
"versionType": "git"
},
{
"status": "affected",
"version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
"lessThan": "efe7f25dd27e35063477b4b0e7eed3675669fd99",
"versionType": "git"
},
{
"status": "affected",
"version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
"lessThan": "2550f89589caad7402d618d7dffc038582c94b6b",
"versionType": "git"
},
{
"status": "affected",
"version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
"lessThan": "c2b8a624911999399cc14822fec3e35032b3cee4",
"versionType": "git"
},
{
"status": "affected",
"version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
"lessThan": "088eaa92fcebaa6b957ccf9635afdf39643a577d",
"versionType": "git"
},
{
"status": "affected",
"version": "076bcd2c93e16b05c10564e299d6e5d26a766d00",
"versionType": "git"
},
{
"status": "affected",
"version": "12b8e81b77c05c658efd9cde3585bbd65ae39b59",
"versionType": "git"
},
{
"status": "affected",
"version": "95025a8dd0ec015872f6c16473fe04d6264e68ca",
"versionType": "git"
},
{
"status": "affected",
"version": "f59ef2a47a228e51322ad76752a55a8917c56e38",
"versionType": "git"
},
{
"status": "affected",
"version": "0ec94795114edc7e24ec71849dce42bfa61dafa3",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.163",
"lessThan": "5.10.270",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.86",
"lessThan": "5.15.221",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.2",
"lessThan": "6.1.188",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.337",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.303",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.270",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.229",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.0.16",
"lessThan": "6.1",
"versionType": "semver"
}
],
"programFiles": [
"drivers/mmc/host/via-sdmmc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/mmc/host/via-sdmmc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89440
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34975 · Revision 1
- Added to Heist Feed
- Publisher date