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io_uring/rw: end write accounting from ->ki_complete

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: io_uring/rw: end write accounting from ->ki_complete Commit b000145e9907 moved both the fsnotify calls and the write accounting out of the kiocb completion handler and into the io_req_rw_complete() task_work. However, only the fsnotify part actually needed to move as it may sleep. Ending the write accounting is just a percpu_up_read() on the superblock writers sem. Deferring it is a problem, because it makes dropping SB_FREEZE_WRITE protection depend on the ring owner getting to running task_work. But the task may be blocked in freeze_super(), causing it to never get to that: task io-wq worker -------------------------------------------------------------- io_write() io_kiocb_start_write() (takes sb_writers, hidden from lockdep by __sb_writers_release) write_iter() -> -EIOCBQUEUED ioctl(FS_IOC_SHUTDOWN) bdev_freeze() freeze_super() percpu_down_write() <- waits for the reader above io_write() kiocb_start_write() percpu_down_read() <- queued behind the writer io_complete_rw() queues io_req_rw_complete() <- never runs, task is in D state End the write from io_complete_rw() instead, and leave only the fsnotify calls in task_work.

Announced Source revision 1
Original source ↗

CVE-2026-97619

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-2026-97619

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": "b000145e9907809406d8164c3b2b8861d95aecd1",
        "lessThan": "ed1cead97afb9c398bd7ab344a3c1ee34ab73af9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b000145e9907809406d8164c3b2b8861d95aecd1",
        "lessThan": "696459029f3b65c070c91b729478475582f1dcdf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b000145e9907809406d8164c3b2b8861d95aecd1",
        "lessThan": "cc580cee4dfa2ec9099c30ecbd4d804cbb996432",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b000145e9907809406d8164c3b2b8861d95aecd1",
        "lessThan": "055d43a1233edbd80e558889258105ce63051bcd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b000145e9907809406d8164c3b2b8861d95aecd1",
        "lessThan": "796aa0547557e63338657ed1c487906f9fac4c73",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ea2e6286e3e89a115ae554e20ba9aec2b2e1ddff",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "89a410dbd0f159ddd308f19d6eb682fc753e4771",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2a853c206e553dd9c0a55c22858fd6a446d93e15",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.10.165",
        "lessThan": "5.11",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.15.90",
        "lessThan": "5.16",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.0.3",
        "lessThan": "6.1",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "io_uring/rw.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.1"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.1",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "io_uring/rw.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-97619

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#48797 · Revision 1
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Publisher date
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