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net/rds: handle zerocopy send cleanup before the message is queued

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy state from rm->m_rs, so an unqueued message can be cleaned up as if it owned normal payload pages. However, zerocopy ownership is really determined by the presence of op_mmp_znotifier, regardless of whether the message has reached the socket queue. Capture op_mmp_znotifier up front in rds_message_purge() and use it as the cleanup discriminator. If the message is already associated with a socket, keep the existing completion path. Otherwise, drop the pinned page accounting directly and release the notifier before putting the payload pages. This keeps early send failure cleanup consistent with the zerocopy lifetime rules without changing the normal queued completion path.

Announced Source revision 1
Original source ↗

CVE-2026-43502

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-2026-43502

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": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
        "lessThan": "e9aefdc5c53fe9aed108c14e3d155710a1bb14c9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
        "lessThan": "46662f7dc59475995609bf3e9d27eb36f4acf26f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
        "lessThan": "1e262db7675e27f42c3f3f47d6011855f4454f24",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
        "lessThan": "21d70744e6d3bbf9293aa1ee6fba7c53ad75275e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
        "lessThan": "3abc8983b2bae3f487f77d9da5527d7d6b210d46",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "14ef6fd18db2494098b21e0471bf27a1d8e9993e",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
        "lessThan": "44b550d88b267320459d518c0743a241ab2108fa",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/rds/message.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.17"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.17",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.140",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.88",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.30",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/rds/message.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-43502

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#28355 · Revision 1
Added to Heist Feed
Publisher date
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