CVE-2026-43359btrfs: fix transaction abort on set received ioctl due to item overflow
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 before b9914db13ac15aca3b74544c0bb1a2e0dad1f174; from dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 before b19c0465e4daad5aa8f60552ea0578cf31a11b1e; from dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 before 2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5; from dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 before d11aefe654a04fc41996d254748d6a38b6b0a7be; from dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 before 41fb97353ff58fa4f31904c343fc8e3df2f7517d; from dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 before 87f2c46003fce4d739138aab4af1942b1afdadac | CNA record |
linux linux_kernel linux:linux_kernel | from 3.12 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 7.0; 7.0; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174patch
- https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1epatch
- https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5patch
- https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7bepatch
- https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517dpatch
- https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadacpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.