iommu/amd: Fix undefined behavior in devid_write debugfs function
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix undefined behavior in devid_write debugfs function When for_each_pci_segment() loop completes without finding a matching segment, the pci_seg pointer is not NULL but points to an invalid memory location (the list head). Accessing pci_seg->id after the loop causes undefined behavior. Fix this by handling the successful case inside the loop and returning -EINVAL after the loop if no matching segment is found.
CVE-2026-92505
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-2026-92505
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": "2e98940f123d9c69d4759078aea9a536244c98d3",
"lessThan": "8aabe0fba01486b5d893e708b05a8fa7f1b7efbb",
"versionType": "git"
},
{
"status": "affected",
"version": "2e98940f123d9c69d4759078aea9a536244c98d3",
"lessThan": "99d42aef089a07cfb1d404a7227ac9dc7628b497",
"versionType": "git"
},
{
"status": "affected",
"version": "2e98940f123d9c69d4759078aea9a536244c98d3",
"lessThan": "843e149989665f8309ad2efe6048dc76591e1f94",
"versionType": "git"
}
],
"programFiles": [
"drivers/iommu/amd/debugfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.17",
"versionType": "semver"
},
{
"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/amd/debugfs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-92505
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37753 · Revision 1
- Added to Heist Feed
- Publisher date