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CVE-2026-89440

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.8 · Élevée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, <5.15.221, e4e46fb61e3bb4628170810d3f2b996b709b90d9, 5.15.221, <efe7f25dd27e35063477b4b0e7eed3675669fd99, <2550f89589caad7402d618d7dffc038582c94b6b, 5.10.270, 0, 7.2.4, <dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02, ba91b413983a9235792523c6b9f7ba2586c4d75d, <4.10, <c2b8a624911999399cc14822fec3e35032b3cee4, 4.14.303, 6.1.188, 12b8e81b77c05c658efd9cde3585bbd65ae39b59, 4.19.270, <4.20, 076bcd2c93e16b05c10564e299d6e5d26a766d00, <=5.10.*, 0959cc1685eb19774300d43ef25e318b457b156b, <=6.6.*, f59ef2a47a228e51322ad76752a55a8917c56e38, 5.4.229, 63400da6cd37a9793c19bb6aed7131b58b975a04, 6.6.157, 6.0.16, 0ec94795114edc7e24ec71849dce42bfa61dafa3, <5bb5327b92aae17e91c7228953c350a6ee3c94e8, <5.5, <=6.18.*, <6.2, <5.10.270, 7.3, 4.9.337, <=7.2.*, 95025a8dd0ec015872f6c16473fe04d6264e68ca, 5.10.163, <=*, <806409f12fdb14c9e4c56a64494c9b75f356cd49, <=5.15.*, 6.1.2, <088eaa92fcebaa6b957ccf9635afdf39643a577d, <d045596706d1b25d38af4a79980b017639fea9d1, 6.18.50, <4.15, <6.1.188, 6.12.109, <6.1, 6.2, 5.15.86

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.

Gravité et risque d'exploitation

CVE-2026-89440 obtient un score CVSS de 7.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.17 %, ce qui la place devant 5.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <5.15.221, e4e46fb61e3bb4628170810d3f2b996b709b90d9, 5.15.221, <efe7f25dd27e35063477b4b0e7eed3675669fd99, <2550f89589caad7402d618d7dffc038582c94b6b, 5.10.270, 0, 7.2.4, <dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02, ba91b413983a9235792523c6b9f7ba2586c4d75d, <4.10, <c2b8a624911999399cc14822fec3e35032b3cee4, 4.14.303, 6.1.188, 12b8e81b77c05c658efd9cde3585bbd65ae39b59, 4.19.270, <4.20, 076bcd2c93e16b05c10564e299d6e5d26a766d00, <=5.10.*, 0959cc1685eb19774300d43ef25e318b457b156b, <=6.6.*, f59ef2a47a228e51322ad76752a55a8917c56e38, 5.4.229, 63400da6cd37a9793c19bb6aed7131b58b975a04, 6.6.157, 6.0.16, 0ec94795114edc7e24ec71849dce42bfa61dafa3, <5bb5327b92aae17e91c7228953c350a6ee3c94e8, <5.5, <=6.18.*, <6.2, <5.10.270, 7.3, 4.9.337, <=7.2.*, 95025a8dd0ec015872f6c16473fe04d6264e68ca, 5.10.163, <=*, <806409f12fdb14c9e4c56a64494c9b75f356cd49, <=5.15.*, 6.1.2, <088eaa92fcebaa6b957ccf9635afdf39643a577d, <d045596706d1b25d38af4a79980b017639fea9d1, 6.18.50, <4.15, <6.1.188, 6.12.109, <6.1, 6.2, 5.15.86) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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