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dmaengine: mmp_pdma: fix wrong sg length in mmp_pdma_prep_slave_sg()

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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
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Publisher date
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