Vulnerability-Lookup

FKIE_CVE-2026-43359

Vulnerability from fkie_nvd - Published: 2026-05-08 15:16 - Updated: 2026-05-15 13:32

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadac	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7be	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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      "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."
    }
  ],
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  "lastModified": "2026-05-15T13:32:58.217",
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-191"
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-11 22:23

Title

btrfs: fix transaction abort on set received ioctl due to item overflow

Summary

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/b9914db13ac15aca3…
https://git.kernel.org/stable/c/b19c0465e4daad5aa…
https://git.kernel.org/stable/c/2e57b8cac2ba0d38a…
https://git.kernel.org/stable/c/d11aefe654a04fc41…
https://git.kernel.org/stable/c/41fb97353ff58fa4f…
https://git.kernel.org/stable/c/87f2c46003fce4d73…

Impacted products

2 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)
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)

Show details on NVD website

JSON

To clipboard

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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.

Action not permitted

FKIE_CVE-2026-43359

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

Tags

Sightings

Nomenclature