Vulnerability-Lookup

FKIE_CVE-2026-68450

Vulnerability from fkie_nvd - Published: 2026-08-12 01:17 - Updated: 2026-08-19 17:20

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: free mapping node on duplicate reloc root insert __add_reloc_root() allocates a mapping_node before inserting it into rc->reloc_root_tree. If rb_simple_insert() finds an existing entry, it returns the existing rb_node and leaves the newly allocated node unlinked. The error path then returns -EEXIST without freeing the new node. Since the node was never inserted into reloc_root_tree, the later cleanup in put_reloc_control() cannot find it either. Free the newly allocated node before returning -EEXIST. The callers currently assert that -EEXIST should not happen, so this is a defensive cleanup for an unexpected duplicate insert path. If the path is ever reached, the local allocation should still be released.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ae0629ff9ccb836416ada129f4edc7efea6eaaad
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/relocation.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "29d9746812d8b7c37d594f484e994fd552c3ec33",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "92bedc0455552b42ada1a1f42b0e3a8593cdfccc",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "14a8be9428435ee17f17fae7991215c246b7fd43",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "797dc567146c7e3c4f8d9680e4fbc76e0a6d9151",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "ae0629ff9ccb836416ada129f4edc7efea6eaaad",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "6a8269b6459ed870a8156c106a0f597383907872",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/relocation.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: free mapping node on duplicate reloc root insert\n\n__add_reloc_root() allocates a mapping_node before inserting it into\nrc-\u003ereloc_root_tree.  If rb_simple_insert() finds an existing entry, it\nreturns the existing rb_node and leaves the newly allocated node unlinked.\n\nThe error path then returns -EEXIST without freeing the new node.  Since\nthe node was never inserted into reloc_root_tree, the later cleanup in\nput_reloc_control() cannot find it either.\n\nFree the newly allocated node before returning -EEXIST.\n\nThe callers currently assert that -EEXIST should not happen, so this is a\ndefensive cleanup for an unexpected duplicate insert path.  If the path is\never reached, the local allocation should still be released."
    }
  ],
  "id": "CVE-2026-68450",
  "lastModified": "2026-08-19T17:20:50.807",
  "metrics": {},
  "published": "2026-08-12T01:17:07.930",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ae0629ff9ccb836416ada129f4edc7efea6eaaad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-68450 (GCVE-0-2026-68450)

Vulnerability from cvelistv5 – Published: 2026-08-12 00:51 – Updated: 2026-08-19 16:35

Title

btrfs: free mapping node on duplicate reloc root insert

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/29d9746812d8b7c37…
https://git.kernel.org/stable/c/b7c5b8e1d5f0779df…
https://git.kernel.org/stable/c/92bedc0455552b42a…
https://git.kernel.org/stable/c/14a8be9428435ee17…
https://git.kernel.org/stable/c/797dc567146c7e3c4…
https://git.kernel.org/stable/c/ae0629ff9ccb83641…
https://git.kernel.org/stable/c/6a8269b6459ed870a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 , < 29d9746812d8b7c37d594f484e994fd552c3ec33 (git) Affected: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 , < b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8 (git) Affected: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 , < 92bedc0455552b42ada1a1f42b0e3a8593cdfccc (git) Affected: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 , < 14a8be9428435ee17f17fae7991215c246b7fd43 (git) Affected: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 , < 797dc567146c7e3c4f8d9680e4fbc76e0a6d9151 (git) Affected: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 , < ae0629ff9ccb836416ada129f4edc7efea6eaaad (git) Affected: 57a304cfd43b2b4a5b44b8f5dc026abb34183068 , < 6a8269b6459ed870a8156c106a0f597383907872 (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/relocation.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "29d9746812d8b7c37d594f484e994fd552c3ec33",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "92bedc0455552b42ada1a1f42b0e3a8593cdfccc",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "14a8be9428435ee17f17fae7991215c246b7fd43",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "797dc567146c7e3c4f8d9680e4fbc76e0a6d9151",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "ae0629ff9ccb836416ada129f4edc7efea6eaaad",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            },
            {
              "lessThan": "6a8269b6459ed870a8156c106a0f597383907872",
              "status": "affected",
              "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/relocation.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: free mapping node on duplicate reloc root insert\n\n__add_reloc_root() allocates a mapping_node before inserting it into\nrc-\u003ereloc_root_tree.  If rb_simple_insert() finds an existing entry, it\nreturns the existing rb_node and leaves the newly allocated node unlinked.\n\nThe error path then returns -EEXIST without freeing the new node.  Since\nthe node was never inserted into reloc_root_tree, the later cleanup in\nput_reloc_control() cannot find it either.\n\nFree the newly allocated node before returning -EEXIST.\n\nThe callers currently assert that -EEXIST should not happen, so this is a\ndefensive cleanup for an unexpected duplicate insert path.  If the path is\never reached, the local allocation should still be released."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:35:45.490Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33"
        },
        {
          "url": "https://git.kernel.org/stable/c/b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8"
        },
        {
          "url": "https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc"
        },
        {
          "url": "https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43"
        },
        {
          "url": "https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151"
        },
        {
          "url": "https://git.kernel.org/stable/c/ae0629ff9ccb836416ada129f4edc7efea6eaaad"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872"
        }
      ],
      "title": "btrfs: free mapping node on duplicate reloc root insert",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68450",
    "datePublished": "2026-08-12T00:51:48.970Z",
    "dateReserved": "2026-07-30T09:28:09.395Z",
    "dateUpdated": "2026-08-19T16:35:45.490Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-68450

CVE-2026-68450 (GCVE-0-2026-68450)

Tags

Sightings

Nomenclature