7.8

CVE-2026-89440: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-89440DEBIAN-CVE-2026-89440
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-89440 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.8% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11805-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.01 pp

From 0.16% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 63400da6cd37a9793c19bb6aed7131b58b975a04, < 5bb5327b92aae17e91c7228953c350a6ee3c94e8 | ≥ 0959cc1685eb19774300d43ef25e318b457b156b, < d045596706d1b25d38af4a79980b017639fea9d1 | ≥ ba91b413983a9235792523c6b9f7ba2586c4d75d, < 806409f12fdb14c9e4c56a64494c9b75f356cd49 | ≥ e4e46fb61e3bb4628170810d3f2b996b709b90d9, < dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02 | ≥ e4e46fb61e3bb4628170810d3f2b996b709b90d9, < efe7f25dd27e35063477b4b0e7eed3675669fd99 | ≥ e4e46fb61e3bb4628170810d3f2b996b709b90d9, < 2550f89589caad7402d618d7dffc038582c94b6b | ≥ e4e46fb61e3bb4628170810d3f2b996b709b90d9, < c2b8a624911999399cc14822fec3e35032b3cee4 | ≥ e4e46fb61e3bb4628170810d3f2b996b709b90d9, < 088eaa92fcebaa6b957ccf9635afdf39643a577d | 076bcd2c93e16b05c10564e299d6e5d26a766d00 | 12b8e81b77c05c658efd9cde3585bbd65ae39b59 | 95025a8dd0ec015872f6c16473fe04d6264e68ca | f59ef2a47a228e51322ad76752a55a8917c56e38 | 0ec94795114edc7e24ec71849dce42bfa61dafa3 | ≥ 5.10.163, < 5.10.270 | ≥ 5.15.86, < 5.15.221 | ≥ 6.1.2, < 6.1.188 | ≥ 4.9.337, < 4.10 | ≥ 4.14.303, < 4.15 | ≥ 4.19.270, < 4.20 | ≥ 5.4.229, < 5.5 | ≥ 6.0.16, < 6.1 | 6.2

3 vendors · 171 products

References

13 links
Show all 13 references