{"id":"CVE-2026-23201","summary":"ceph: fix oops due to invalid pointer for kfree() in parse_longname()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix oops due to invalid pointer for kfree() in parse_longname()\n\nThis fixes a kernel oops when reading ceph snapshot directories (.snap),\nfor example by simply running `ls /mnt/my_ceph/.snap`.\n\nThe variable str is guarded by __free(kfree), but advanced by one for\nskipping the initial '_' in snapshot names. Thus, kfree() is called\nwith an invalid pointer.  This patch removes the need for advancing the\npointer so kfree() is called with correct memory pointer.\n\nSteps to reproduce:\n\n1. Create snapshots on a cephfs volume (I've 63 snaps in my testcase)\n\n2. Add cephfs mount to fstab\n$ echo \"samba-fileserver@.files=/volumes/datapool/stuff/3461082b-ecc9-4e82-8549-3fd2590d3fb6      /mnt/test/stuff   ceph     acl,noatime,_netdev    0       0\" \u003e\u003e /etc/fstab\n\n3. Reboot the system\n$ systemctl reboot\n\n4. Check if it's really mounted\n$ mount | grep stuff\n\n5. List snapshots (expected 63 snapshots on my system)\n$ ls /mnt/test/stuff/.snap\n\nNow ls hangs forever and the kernel log shows the oops.","modified":"2026-05-01T08:30:11.978292821Z","published":"2026-02-14T16:27:25.693Z","related":["SUSE-SU-2026:1573-1","SUSE-SU-2026:1661-1","SUSE-SU-2026:21114-1","SUSE-SU-2026:21123-1","SUSE-SU-2026:21237-1","SUSE-SU-2026:21255-1","SUSE-SU-2026:21352-1","SUSE-SU-2026:21361-1","openSUSE-SU-2026:20572-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23201.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/8c9af7339de419819cfc641d551675d38ff99abf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bc8dedae022ce3058659c3addef3ec4b41d15e00"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e258ed369c9e04caa7d2fd49785d753ae4034cb6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23201.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23201"},{"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":"bb80f7618832d26f7e395f52f82b1dac76223e5f"},{"fixed":"8c9af7339de419819cfc641d551675d38ff99abf"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"101841c38346f4ca41dc1802c867da990ffb32eb"},{"fixed":"e258ed369c9e04caa7d2fd49785d753ae4034cb6"},{"fixed":"bc8dedae022ce3058659c3addef3ec4b41d15e00"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"3145b2b11492d61c512bbc59660bb823bc757f48"},{"last_affected":"493479af8af3ab907f49e99323777d498a4fbd2b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23201.json"}}],"schema_version":"1.7.5"}