iommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path
In the Linux kernel, the following vulnerability has been resolved: iommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path In iommu_dma_map_sg(), when handling PCI P2PDMA cases, the DMA length of the current scatterlist segment `s` is incorrectly assigned from the head entry `sg->length` instead of the current entry `s->length`. This typo causes all P2PDMA segments in the scatterlist to inherit the length of the first segment, leading to corrupted DMA lengths for multi- segment scatterlists. Fix this by using `s->length` instead of `sg->length`.
CVE-2026-74277
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-2026-74277
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": "a25e7962db0d79882c9d32fd2a67a02e79129c0e",
"lessThan": "6166cb1344f16dd403f2192f4bea6f6654f1ae1e",
"versionType": "git"
},
{
"status": "affected",
"version": "a25e7962db0d79882c9d32fd2a67a02e79129c0e",
"lessThan": "8646f00ce021e49f4f05bc1d4060a0c27b25d0e1",
"versionType": "git"
},
{
"status": "affected",
"version": "a25e7962db0d79882c9d32fd2a67a02e79129c0e",
"lessThan": "db50fb87015b955a5a0c155293b2dd40d63a3b9e",
"versionType": "git"
}
],
"programFiles": [
"drivers/iommu/dma-iommu.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/iommu/dma-iommu.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74277
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33075 · Revision 1
- Added to Heist Feed
- Publisher date