CVE-2026-98921

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovl_do_mkdir() debug print ovl_do_mkdir() prints the input dentry with %pd after vfs_mkdir(). Since commit fe497f0759e0 ("VFS: change vfs_mkdir() to unlock on failure."), vfs_mkdir() calls end_creating() on the input dentry on failure and may replace it on success, so the post-call %pd can use-after-free the dentry when CONFIG_OVERLAY_FS_DEBUG is enabled. Print the dentry before the call and only the result afterward.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-23 13:17:12.733000

Last modified

2026-10-23 13:17:12.733000

View original CVE JSON

{
  "id": "CVE-2026-98921",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-23T13:17:12.733",
  "lastModified": "2026-10-23T13:17:12.733",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix UAF in ovl_do_mkdir() debug print\n\novl_do_mkdir() prints the input dentry with %pd after vfs_mkdir().\nSince commit fe497f0759e0 (\"VFS: change vfs_mkdir() to unlock on\nfailure.\"), vfs_mkdir() calls end_creating() on the input dentry on\nfailure and may replace it on success, so the post-call %pd can\nuse-after-free the dentry when CONFIG_OVERLAY_FS_DEBUG is enabled.\n\nPrint the dentry before the call and only the result afterward."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "fs/overlayfs/overlayfs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "fe497f0759e0efb949f9480911d00b6045c21f50",
              "lessThan": "719bd33ab359c539a68a278c15a97deb77565cdb",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fe497f0759e0efb949f9480911d00b6045c21f50",
              "lessThan": "ae146bc1abdeb4607abf2975b858c053024e8ac1",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "fs/overlayfs/overlayfs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.19",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.19",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.9",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/719bd33ab359c539a68a278c15a97deb77565cdb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ae146bc1abdeb4607abf2975b858c053024e8ac1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}