iommu/tegra241-cmdqv: Free the error IRQ before tearing down VINTFs
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.
CVE-2026-90426
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-2026-90426
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": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943",
"lessThan": "076a4f5b1fc2016b973a12bc2ebb9b730e5e1e48",
"versionType": "git"
},
{
"status": "affected",
"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943",
"lessThan": "735698e81f798b4c02dcb6291ffbdd1b962c8c66",
"versionType": "git"
},
{
"status": "affected",
"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943",
"lessThan": "421f5ab135cd4a1353891e5bf2602cfc3c01afc7",
"versionType": "git"
},
{
"status": "affected",
"version": "918eb5c856f6ce4cf93b4b38e4b5e156905c5943",
"lessThan": "61f0d437988e5730b04442f6a7d30a9907339f2a",
"versionType": "git"
}
],
"programFiles": [
"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90426
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36741 · Revision 1
- Added to Heist Feed
- Publisher date