CVE-2026-43359None▾ SunlitIn 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_K…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 < b9914db13ac15aca3b74544c0bb1a2e0dad1f174Linux >= dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 < b19c0465e4daad5aa8f60552ea0578cf31a11b1eLinux >= dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 < 2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5Linux >= dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 < d11aefe654a04fc41996d254748d6a38b6b0a7beLinux >= dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 < 41fb97353ff58fa4f31904c343fc8e3df2f7517dLinux >= dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70 < 87f2c46003fce4d739138aab4af1942b1afdadacLinux 3.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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