GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-43359 (GCVE-0-2026-43359)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-11 22:23
VLAI
Title
btrfs: fix transaction abort on set received ioctl due to item overflow
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix transaction abort on set received ioctl due to item overflow If the set received ioctl fails due to an item overflow when attempting to add the BTRFS_UUID_KEY_RECEIVED_SUBVOL we have to abort the transaction since we did some metadata updates before. This means that if a user calls this ioctl with the same received UUID field for a lot of subvolumes, we will hit the overflow, trigger the transaction abort and turn the filesystem into RO mode. A malicious user could exploit this, and this ioctl does not even requires that a user has admin privileges (CAP_SYS_ADMIN), only that he/she owns the subvolume. Fix this by doing an early check for item overflow before starting a transaction. This is also race safe because we are holding the subvol_sem semaphore in exclusive (write) mode. A test case for fstests will follow soon.
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: dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 , < b9914db13ac15aca3b74544c0bb1a2e0dad1f174 (git)
Affected: dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 , < b19c0465e4daad5aa8f60552ea0578cf31a11b1e (git)
Affected: dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 , < 2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5 (git)
Affected: dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 , < d11aefe654a04fc41996d254748d6a38b6b0a7be (git)
Affected: dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 , < 41fb97353ff58fa4f31904c343fc8e3df2f7517d (git)
Affected: dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 , < 87f2c46003fce4d739138aab4af1942b1afdadac (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.12
Unaffected: 0 , < 3.12 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c",
            "fs/btrfs/uuid-tree.c",
            "fs/btrfs/uuid-tree.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b9914db13ac15aca3b74544c0bb1a2e0dad1f174",
              "status": "affected",
              "version": "dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70",
              "versionType": "git"
            },
            {
              "lessThan": "b19c0465e4daad5aa8f60552ea0578cf31a11b1e",
              "status": "affected",
              "version": "dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70",
              "versionType": "git"
            },
            {
              "lessThan": "2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5",
              "status": "affected",
              "version": "dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70",
              "versionType": "git"
            },
            {
              "lessThan": "d11aefe654a04fc41996d254748d6a38b6b0a7be",
              "status": "affected",
              "version": "dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70",
              "versionType": "git"
            },
            {
              "lessThan": "41fb97353ff58fa4f31904c343fc8e3df2f7517d",
              "status": "affected",
              "version": "dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70",
              "versionType": "git"
            },
            {
              "lessThan": "87f2c46003fce4d739138aab4af1942b1afdadac",
              "status": "affected",
              "version": "dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c",
            "fs/btrfs/uuid-tree.c",
            "fs/btrfs/uuid-tree.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.12"
            },
            {
              "lessThan": "3.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "3.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "3.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.78",
                  "versionStartIncluding": "3.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.19",
                  "versionStartIncluding": "3.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.9",
                  "versionStartIncluding": "3.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "3.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix transaction abort on set received ioctl due to item overflow\n\nIf the set received ioctl fails due to an item overflow when attempting to\nadd the BTRFS_UUID_KEY_RECEIVED_SUBVOL we have to abort the transaction\nsince we did some metadata updates before.\n\nThis means that if a user calls this ioctl with the same received UUID\nfield for a lot of subvolumes, we will hit the overflow, trigger the\ntransaction abort and turn the filesystem into RO mode. A malicious user\ncould exploit this, and this ioctl does not even requires that a user\nhas admin privileges (CAP_SYS_ADMIN), only that he/she owns the subvolume.\n\nFix this by doing an early check for item overflow before starting a\ntransaction. This is also race safe because we are holding the subvol_sem\nsemaphore in exclusive (write) mode.\n\nA test case for fstests will follow soon."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:23:03.390Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174"
        },
        {
          "url": "https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1e"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7be"
        },
        {
          "url": "https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517d"
        },
        {
          "url": "https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadac"
        }
      ],
      "title": "btrfs: fix transaction abort on set received ioctl due to item overflow",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43359",
    "datePublished": "2026-05-08T14:21:14.357Z",
    "dateReserved": "2026-05-01T14:12:56.005Z",
    "dateUpdated": "2026-05-11T22:23:03.390Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43359",
      "date": "2026-09-15",
      "epss": "0.00123",
      "percentile": "0.02351"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43359\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-08T15:16:46.717\",\"lastModified\":\"2026-06-17T10:49:26.950\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: fix transaction abort on set received ioctl due to item overflow\\n\\nIf the set received ioctl fails due to an item overflow when attempting to\\nadd the BTRFS_UUID_KEY_RECEIVED_SUBVOL we have to abort the transaction\\nsince we did some metadata updates before.\\n\\nThis means that if a user calls this ioctl with the same received UUID\\nfield for a lot of subvolumes, we will hit the overflow, trigger the\\ntransaction abort and turn the filesystem into RO mode. A malicious user\\ncould exploit this, and this ioctl does not even requires that a user\\nhas admin privileges (CAP_SYS_ADMIN), only that he/she owns the subvolume.\\n\\nFix this by doing an early check for item overflow before starting a\\ntransaction. This is also race safe because we are holding the subvol_sem\\nsemaphore in exclusive (write) mode.\\n\\nA test case for fstests will follow soon.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/btrfs/ioctl.c\",\"fs/btrfs/uuid-tree.c\",\"fs/btrfs/uuid-tree.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70\",\"lessThan\":\"b9914db13ac15aca3b74544c0bb1a2e0dad1f174\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70\",\"lessThan\":\"b19c0465e4daad5aa8f60552ea0578cf31a11b1e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70\",\"lessThan\":\"2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70\",\"lessThan\":\"d11aefe654a04fc41996d254748d6a38b6b0a7be\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70\",\"lessThan\":\"41fb97353ff58fa4f31904c343fc8e3df2f7517d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70\",\"lessThan\":\"87f2c46003fce4d739138aab4af1942b1afdadac\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/btrfs/ioctl.c\",\"fs/btrfs/uuid-tree.c\",\"fs/btrfs/uuid-tree.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.167\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.78\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.19\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.9\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-191\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.12\",\"versionEndExcluding\":\"6.1.167\",\"matchCriteriaId\":\"02E7A70D-F1C7-443F-9AC7-20EDD914F45D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.130\",\"matchCriteriaId\":\"C57BB918-DF28-46B3-94F7-144176841267\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.78\",\"matchCriteriaId\":\"28D591F5-B196-4CC9-905C-DC80F116E7A8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.19\",\"matchCriteriaId\":\"D394AC60-6F28-435F-872A-CCDF384B8331\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.9\",\"matchCriteriaId\":\"E825E7C3-FEAC-4FD3-8A81-78D7387948C9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"F253B622-8837-4245-BCE5-A7BF8FC76A16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F666C8D8-6538-46D4-B318-87610DE64C34\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:37:08+00:00",
      "cve": "CVE-2026-43359",
      "id": "CVE-2026-43359",
      "initial_release_date": "2026-05-08T00:00:00+00:00",
      "product_status:known_affected": "118",
      "product_status:known_not_affected": "156",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: btrfs: fix transaction abort on set received ioctl due to item overflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43359.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:18:21Z",
      "cve": "CVE-2026-43359",
      "id": "CVE-2026-43359",
      "initial_release_date": "2026-05-11T14:14:03Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "639",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "316",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43359",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43359.json",
      "version": "20"
    }
  }
}



Log in or create an account to share your comment.




Tags
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.