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libceph: make free_choose_arg_map() resilient to partial allocation

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: libceph: make free_choose_arg_map() resilient to partial allocation free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation. For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer. To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.

Announced Source revision 1
Original source ↗

CVE-2026-22991

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-2026-22991

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": "5cf9c4a9959b6273675310d14a834ef14fbca37c",
        "lessThan": "9b3730dabcf3764bfe3ff07caf55e641a0b45234",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c",
        "lessThan": "851241d3f78a5505224dc21c03d8692f530256b4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c",
        "lessThan": "ec1850f663da64842614c86b20fe734be070c2ba",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c",
        "lessThan": "8081faaf089db5280c3be820948469f7c58ef8dd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c",
        "lessThan": "c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c",
        "lessThan": "f21c3fdb96833aac2f533506899fe38c19cf49d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5cf9c4a9959b6273675310d14a834ef14fbca37c",
        "lessThan": "e3fe30e57649c551757a02e1cad073c47e1e075e",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/ceph/osdmap.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.248",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.198",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.161",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.121",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.66",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.6",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ceph/osdmap.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-22991

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#39721 · Revision 1
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Publisher date
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