{"id":"CVE-2026-43359","summary":"btrfs: fix transaction abort on set received ioctl due to item overflow","details":"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.","modified":"2026-07-15T01:49:09.205867384Z","published":"2026-05-08T14:21:14.357Z","related":["SUSE-SU-2026:22043-1","SUSE-SU-2026:22048-1","SUSE-SU-2026:22076-1","SUSE-SU-2026:22087-1","SUSE-SU-2026:22108-1","SUSE-SU-2026:22137-1","SUSE-SU-2026:22433-1","SUSE-SU-2026:22458-1","SUSE-SU-2026:2450-1","SUSE-SU-2026:2482-1","SUSE-SU-2026:2591-1","openSUSE-SU-2026:20912-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43359.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadac"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7be"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43359.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43359"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dd5f9615fc5c5e8d3751aab3a17b92768fb1ce70"},{"fixed":"b9914db13ac15aca3b74544c0bb1a2e0dad1f174"},{"fixed":"b19c0465e4daad5aa8f60552ea0578cf31a11b1e"},{"fixed":"2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5"},{"fixed":"d11aefe654a04fc41996d254748d6a38b6b0a7be"},{"fixed":"41fb97353ff58fa4f31904c343fc8e3df2f7517d"},{"fixed":"87f2c46003fce4d739138aab4af1942b1afdadac"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43359.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43359.json"}}],"schema_version":"1.7.5"}