CVE-2026-31714 (GCVE-0-2026-31714)

Vulnerability from cvelistv5 – Published: 2026-05-01 13:56 – Updated: 2026-06-14 17:44
VLAI
Title
f2fs: fix to avoid memory leak in f2fs_rename()
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid memory leak in f2fs_rename() syzbot reported a f2fs bug as below: BUG: memory leak unreferenced object 0xffff888127f70830 (size 16): comm "syz.0.23", pid 6144, jiffies 4294943712 hex dump (first 16 bytes): 3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff <.Wr[...n..3B9.. backtrace (crc 925f8a80): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364 f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143 f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961 f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308 vfs_rename+0x7ff/0x1250 fs/namei.c:6026 filename_renameat2+0x4f4/0x660 fs/namei.c:6144 __do_sys_renameat2 fs/namei.c:6173 [inline] __se_sys_renameat2 fs/namei.c:6168 [inline] __x64_sys_renameat2+0x59/0x80 fs/namei.c:6168 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is in commit 40b2d55e0452 ("f2fs: fix to create selinux label during whiteout initialization"), we added a call to f2fs_setup_filename() without a matching call to f2fs_free_filename(), fix it.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7525dec4b34c80b3015c3f2ac143fd2bfc1febc3 , < a76c1cad4e80a9802ef8048662255417e3ce5b79 (git)
Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < c78206dcb912ab60b8ee3cbe8c48d749a9a12e1e (git)
Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < 047c0aef6af37a2a35181aa085c616ad286386f1 (git)
Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < 369eb2016d8e2f01931b3bad1cb9cefa83f44003 (git)
Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < 3cf11e6f36c170050c12171dd6fd3142711478fc (git)
Affected: 1d1b89c9846e6a550eca3d2ce9323fb591e4f321 (git)
Affected: 64582cc5357cd984724cfb0835b4a34d9c279d31 (git)
Affected: 6.6.23 , < 6.6.136 (semver)
Affected: 6.7.11 , < 6.8 (semver)
Affected: 6.8.2 , < 6.9 (semver)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.84 , ≤ 6.12.* (semver)
Unaffected: 6.18.25 , ≤ 6.18.* (semver)
Unaffected: 7.0.2 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid memory leak in f2fs_rename()\n\nsyzbot reported a f2fs bug as below:\n\nBUG: memory leak\nunreferenced object 0xffff888127f70830 (size 16):\n  comm \"syz.0.23\", pid 6144, jiffies 4294943712\n  hex dump (first 16 bytes):\n    3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff  \u003c.Wr[...n..3B9..\n  backtrace (crc 925f8a80):\n    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n    slab_post_alloc_hook mm/slub.c:4520 [inline]\n    slab_alloc_node mm/slub.c:4844 [inline]\n    __do_kmalloc_node mm/slub.c:5237 [inline]\n    __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250\n    kmalloc_noprof include/linux/slab.h:954 [inline]\n    fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364\n    f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143\n    f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961\n    f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308\n    vfs_rename+0x7ff/0x1250 fs/namei.c:6026\n    filename_renameat2+0x4f4/0x660 fs/namei.c:6144\n    __do_sys_renameat2 fs/namei.c:6173 [inline]\n    __se_sys_renameat2 fs/namei.c:6168 [inline]\n    __x64_sys_renameat2+0x59/0x80 fs/namei.c:6168\n    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n    do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94\n    entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is in commit 40b2d55e0452 (\"f2fs: fix to create selinux\nlabel during whiteout initialization\"), we added a call to\nf2fs_setup_filename() without a matching call to f2fs_free_filename(),\nfix it."
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        "id": "CVE-2026-31714",
        "lastModified": "2026-06-17T10:34:17.683",
        "metrics": {
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              "cvssData": {
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                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
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              "source": "nvd@nist.gov",
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        "published": "2026-05-01T14:16:21.493",
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/369eb2016d8e2f01931b3bad1cb9cefa83f44003"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/3cf11e6f36c170050c12171dd6fd3142711478fc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a76c1cad4e80a9802ef8048662255417e3ce5b79"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c78206dcb912ab60b8ee3cbe8c48d749a9a12e1e"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-401"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:27:44+00:00",
      "cve": "CVE-2026-31714",
      "id": "CVE-2026-31714",
      "initial_release_date": "2026-05-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: fix to avoid memory leak in f2fs_rename()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31714.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-06-15T01:26:45Z",
      "cve": "CVE-2026-31714",
      "id": "CVE-2026-31714",
      "initial_release_date": "2026-05-02T01:25:15Z",
      "product_status:known_not_affected": "291",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31714",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31714.json",
      "version": "5"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.