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CVE-2026-43117 (GCVE-0-2026-43117)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-08-05 12:26
VLAI
Title
btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file() If overlay is used on top of btrfs, dentry->d_sb translates to overlay's super block and fsid assignment will lead to a crash. Use file_inode(file)->i_sb to always get btrfs_sb.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < 4a7bab35fad5251c8cb738161152578cd83b6b9c (git)
Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < 520e8b4bcf872a534a7bf61ccf880047642df296 (git)
Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < e252db8ca2a01f82d472091f35d549b313278636 (git)
Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < c09a7446aab5773f38d6abb25fce99b8e1dfbc97 (git)
Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < 32372781d664a9b03c40343e96c29d0a6139f97d (git)
Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < 2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a (git)
Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < d110d7cdb045715c0b45b0dfd974525bb38f653d (git)
Affected: bc074524e123ded281cde25ebc5661910f9679e3 , < a85b46db143fda5869e7d8df8f258ccef5fa1719 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "url": "https://git.kernel.org/stable/c/520e8b4bcf872a534a7bf61ccf880047642df296"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a85b46db143fda5869e7d8df8f258ccef5fa1719"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c09a7446aab5773f38d6abb25fce99b8e1dfbc97"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d110d7cdb045715c0b45b0dfd974525bb38f653d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e252db8ca2a01f82d472091f35d549b313278636"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-13T16:57:05+00:00",
      "cve": "CVE-2026-43117",
      "id": "CVE-2026-43117",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: btrfs filesystem crash via incorrect superblock handling with overlayfs",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43117.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T13:40:55Z",
      "cve": "CVE-2026-43117",
      "id": "CVE-2026-43117",
      "initial_release_date": "2026-05-07T02:18:04Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "643",
      "product_status:known_not_affected": "15",
      "product_status:recommended": "287",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43117",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43117.json",
      "version": "10"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.