dmaengine: mmp_pdma: fix wrong sg length in mmp_pdma_prep_slave_sg()
In the Linux kernel, the following vulnerability has been resolved: dmaengine: mmp_pdma: fix wrong sg length in mmp_pdma_prep_slave_sg() In mmp_pdma_prep_slave_sg(), for_each_sg() iterates the scatterlist putting each entry into 'sg', but the entry length is read from 'sgl' (the list head) instead of 'sg' (the current entry): for_each_sg(sgl, sg, sg_len, i) { addr = sg_dma_address(sg); avail = sg_dma_len(sgl); /* should be 'sg' */ Consequently 'avail' is always the length of the first entry. For multi-sg lists this causes out-of-bounds reads when a later entry is shorter than the first, and silent data loss when it is longer. Single-sg or uniformly-sized lists happen to mask the issue.
CVE-2026-98298
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-2026-98298
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": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "f448a5f5bd10d792440a1b08cf2e8f311767032d",
"versionType": "git"
},
{
"status": "affected",
"version": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "2148db529f082d6e3ca95413bf943442f4ef30cc",
"versionType": "git"
},
{
"status": "affected",
"version": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "d920c07aa6d89ec11afdb6976aafaee9563a5234",
"versionType": "git"
},
{
"status": "affected",
"version": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "4a33886057e6d127555efb022879c583e966acc5",
"versionType": "git"
},
{
"status": "affected",
"version": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "88a505330eb06128f7ce79a4c5e4832b7601b3d1",
"versionType": "git"
},
{
"status": "affected",
"version": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "bae65e4925928f77824ca0103122e2ed20ef5802",
"versionType": "git"
},
{
"status": "affected",
"version": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "54ccc01012a240476edf641bf1a2b8bff54fe6ae",
"versionType": "git"
},
{
"status": "affected",
"version": "c8acd6aa6bed3c0fd7898202f4ebc534db9085f2",
"lessThan": "075bc7b1d3dde5ed43fbaabbc1a69f09b7fc3a47",
"versionType": "git"
}
],
"programFiles": [
"drivers/dma/mmp_pdma.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dma/mmp_pdma.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98298
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38375 · Revision 1
- Added to Heist Feed
- Publisher date