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protect the fetch of ->fd[fd] in do_dup2() from mispredictions

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: protect the fetch of ->fd[fd] in do_dup2() from mispredictions both callers have verified that fd is not greater than ->max_fds; however, misprediction might end up with tofree = fdt->fd[fd]; being speculatively executed. That's wrong for the same reasons why it's wrong in close_fd()/file_close_fd_locked(); the same solution applies - array_index_nospec(fd, fdt->max_fds) could differ from fd only in case of speculative execution on mispredicted path.

Announced Source revision 1
Original source ↗

CVE-2024-42265

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-2024-42265

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": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "ed42e8ff509d2a61c6642d1825032072dab79f26",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "41a6c31df77bd8e050136b0a200b537da9e1084a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "08775b3d6ed117cf4518754ec7300ee42b6a5368",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "3f480493550b6a23d3a65d095d6569d4a7f56a0f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "5db999fff545b924b24c9afd368ef5c17279b176",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "da72e783afd27d9f487836b2e6738146c0edd149",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "1171ceccabfd596ca370c5d2cbb47d110c3f2fe1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8280d16172243702ed43432f826ca6130edb4086",
        "lessThan": "8aa37bde1a7b645816cda8b80df4753ecf172bf1",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/file.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": "4.19.320",
        "versionType": "semver",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.282",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.224",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.165",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.104",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.45",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.10.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.10.*"
      },
      {
        "status": "unaffected",
        "version": "6.11",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/file.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2024-42265

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#26675 · Revision 1
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Publisher date
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