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

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-08 14:21
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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
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)
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)
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": "2026-05-08T14:21:14.357Z",
        "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": "2026-05-08T14:21:14.357Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43359",
      "date": "2026-05-09",
      "epss": "0.00024",
      "percentile": "0.07036"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43359\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-08T15:16:46.717\",\"lastModified\":\"2026-05-08T15:16:46.717\",\"vulnStatus\":\"Received\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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.