CVE-2026-90426

CVE CVE-2026-90426EUVD EUVD-2026-82087Published 2026-09-17T16:09:48.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: iommu/tegra241-cmdqv: Free the error IRQ before tearing down VINTFs tegra241_cmdqv_remove() tears each VINTF down first, then calls free_irq(). Tearing a VINTF down frees vintf0 and clears cmdqv->vintfs[0]. An error in that window makes tegra241_cmdqv_isr() read the stale slot and hand it to tegra241_vintf0_handle_error(), which dereferences a NULL or freed pointer. Free the IRQ before tearing the VINTFs down. free_irq() waits for in-flight handlers to finish and blocks new ones, so no ISR can observe a VINTF as it is torn down. Note: a user-owned VINTF (viommu) could outlive this teardown, which unmaps cmdqv->base and frees cmdqv->vintfs, so a later viommu close then touches freed memory. This is neither introduced nor fixed here: a physical IOMMU is not a pluggable device, so iommufd by design holds no reference on the one behind a viommu, and this teardown is not expected while that viommu is still alive.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.12.110; 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48; patch: 7.2.6; 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <421f5ab135cd4a1353891e5bf2602cfc3c01afc7; 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <735698e81f798b4c02dcb6291ffbdd1b962c8c66; 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <61f0d437988e5730b04442f6a7d30a9907339f2a; patch: 0; patch: 7.3-rc1; patch: 6.18.52; 6.12

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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