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quota: Fix potential NULL pointer dereference

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.

Announced Source revision 1
Original source ↗

CVE-2024-26878

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-2024-26878

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": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "8514899c1a4edf802f03c408db901063aa3f05a1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "49669f8e7eb053f91d239df7b1bfb4500255a9d0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "61380537aa6dd32d8a723d98b8f1bd1b11d8fee0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "7f9e833fc0f9b47be503af012eb5903086939754",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "f2649d98aa9ca8623149b3cb8df00c944f5655c7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "6afc9f4434fa8063aa768c2bf5bf98583aee0877",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac",
        "lessThan": "d0aa72604fbd80c8aabb46eda00535ed35570f1f",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/quota/dquot.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "4.19.311",
        "versionType": "semver",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.273",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.214",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.153",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.83",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.23",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7.11",
        "versionType": "semver",
        "lessThanOrEqual": "6.7.*"
      },
      {
        "status": "unaffected",
        "version": "6.8.2",
        "versionType": "semver",
        "lessThanOrEqual": "6.8.*"
      },
      {
        "status": "unaffected",
        "version": "6.9",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/quota/dquot.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2024-26878

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#26442 · Revision 1
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Publisher date
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