CVE-2026-89440mmc: via-sdmmc: stop card-detect handling on probe failure
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 63400da6cd37a9793c19bb6aed7131b58b975a04 – < 5bb5327b92aae17e91c7228953c350a6ee3c94e8
- affected 0959cc1685eb19774300d43ef25e318b457b156b – < d045596706d1b25d38af4a79980b017639fea9d1
- affected ba91b413983a9235792523c6b9f7ba2586c4d75d – < 806409f12fdb14c9e4c56a64494c9b75f356cd49
- affected e4e46fb61e3bb4628170810d3f2b996b709b90d9 – < dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02
- affected e4e46fb61e3bb4628170810d3f2b996b709b90d9 – < efe7f25dd27e35063477b4b0e7eed3675669fd99
- affected e4e46fb61e3bb4628170810d3f2b996b709b90d9 – < 2550f89589caad7402d618d7dffc038582c94b6b
- affected e4e46fb61e3bb4628170810d3f2b996b709b90d9 – < c2b8a624911999399cc14822fec3e35032b3cee4
- affected e4e46fb61e3bb4628170810d3f2b996b709b90d9 – < 088eaa92fcebaa6b957ccf9635afdf39643a577d
- affected 076bcd2c93e16b05c10564e299d6e5d26a766d00
- affected 12b8e81b77c05c658efd9cde3585bbd65ae39b59
- affected 95025a8dd0ec015872f6c16473fe04d6264e68ca
- affected f59ef2a47a228e51322ad76752a55a8917c56e38
- affected 0ec94795114edc7e24ec71849dce42bfa61dafa3
- affected 5.10.163 – < 5.10.270
- affected 5.15.86 – < 5.15.221
- affected 6.1.2 – < 6.1.188
- affected 4.9.337 – < 4.10
- affected 4.14.303 – < 4.15
- affected 4.19.270 – < 4.20
- affected 5.4.229 – < 5.5
- affected 6.0.16 – < 6.1
- affected 6.2
- unaffected < 6.2
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/5bb5327b92aae17e91c7228953c350a6ee3c94e8 (opens in a new tab)
- https://git.kernel.org/stable/c/d045596706d1b25d38af4a79980b017639fea9d1 (opens in a new tab)
- https://git.kernel.org/stable/c/806409f12fdb14c9e4c56a64494c9b75f356cd49 (opens in a new tab)
- https://git.kernel.org/stable/c/dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02 (opens in a new tab)
- https://git.kernel.org/stable/c/efe7f25dd27e35063477b4b0e7eed3675669fd99 (opens in a new tab)
- https://git.kernel.org/stable/c/2550f89589caad7402d618d7dffc038582c94b6b (opens in a new tab)
- https://git.kernel.org/stable/c/c2b8a624911999399cc14822fec3e35032b3cee4 (opens in a new tab)
- https://git.kernel.org/stable/c/088eaa92fcebaa6b957ccf9635afdf39643a577d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76346 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89440)Record last updated .