{"cvss":5.5,"datePublished":"2026-02-14T17:15:57.950","dateUpdated":"2026-09-14T12:17:39.287","description":"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\" >> /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.","id":"CVE-2026-23201","raw":{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ceph/crypto.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c9a129c82ddf82a50b4f8960d2609714ca2dbd26","status":"affected","version":"4b9aee707c4580511983a0998547f3b28514e6a6","versionType":"git"},{"lessThan":"8c9af7339de419819cfc641d551675d38ff99abf","status":"affected","version":"bb80f7618832d26f7e395f52f82b1dac76223e5f","versionType":"git"},{"lessThan":"e258ed369c9e04caa7d2fd49785d753ae4034cb6","status":"affected","version":"101841c38346f4ca41dc1802c867da990ffb32eb","versionType":"git"},{"lessThan":"bc8dedae022ce3058659c3addef3ec4b41d15e00","status":"affected","version":"101841c38346f4ca41dc1802c867da990ffb32eb","versionType":"git"},{"status":"affected","version":"3145b2b11492d61c512bbc59660bb823bc757f48","versionType":"git"},{"status":"affected","version":"493479af8af3ab907f49e99323777d498a4fbd2b","versionType":"git"},{"lessThan":"6.12.70","status":"affected","version":"6.12.42","versionType":"semver"},{"lessThan":"6.16","status":"affected","version":"6.15.10","versionType":"semver"},{"lessThan":"6.17","status":"affected","version":"6.16.1","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ceph/crypto.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.17"},{"lessThan":"6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.70","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.19","versionType":"original_commit_for_fix"}]}],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"4E35130D-49A4-4F25-AFAF-52726A775239","versionEndExcluding":"6.12.70","versionStartIncluding":"6.12.42","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"8E12C24E-0833-48D3-9A8D-574823A693F0","versionEndExcluding":"6.16","versionStartIncluding":"6.15.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"496F2923-911F-4FFD-B9A0-4B9D70EBA1C4","versionEndExcluding":"6.18.10","versionStartIncluding":"6.16.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*","matchCriteriaId":"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*","matchCriteriaId":"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*","matchCriteriaId":"F71D92C0-C023-48BD-B3B6-70B638EEE298","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*","matchCriteriaId":"13580667-0A98-40CC-B29F-D12790B91BDB","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*","matchCriteriaId":"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*","matchCriteriaId":"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*","matchCriteriaId":"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*","matchCriteriaId":"EB5B7DFC-C36B-45D8-922C-877569FDDF43","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"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\" >> /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."},{"lang":"es","value":"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nceph: corrige un oops debido a un puntero inválido para kfree() en parse_longname()\n\nEsto corrige un oops del kernel al leer directorios de instantáneas de ceph (.snap), por ejemplo, simplemente ejecutando 'ls /mnt/my_ceph/.snap'.\n\nLa variable str está protegida por __free(kfree), pero se avanza en uno para saltar el '_' inicial en los nombres de las instantáneas. Por lo tanto, se llama a kfree() con un puntero inválido. Este parche elimina la necesidad de avanzar el puntero para que se llame a kfree() con el puntero de memoria correcto.\n\nPasos para reproducir:\n\n1. Crea instantáneas en un volumen cephfs (tengo 63 instantáneas en mi caso de prueba)\n\n2. Añade el montaje cephfs a fstab\n$ echo 'samba-fileserver@.files=/volumes/datapool/stuff/3461082b-ecc9-4e82-8549-3fd2590d3fb6      /mnt/test/stuff   ceph     acl,noatime,_netdev    0       0' >> /etc/fstab\n\n3. Reinicia el sistema\n$ systemctl reboot\n\n4. Comprueba si está realmente montado\n$ mount | grep stuff\n\n5. Lista las instantáneas (se esperan 63 instantáneas en mi sistema)\n$ ls /mnt/test/stuff/.snap\n\nAhora ls se cuelga indefinidamente y el registro del kernel muestra el oops."}],"id":"CVE-2026-23201","lastModified":"2026-09-14T12:17:39.287","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","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","version":"3.1"},"exploitabilityScore":1.8,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2026-02-14T17:15:57.950","references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/8c9af7339de419819cfc641d551675d38ff99abf"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/bc8dedae022ce3058659c3addef3ec4b41d15e00"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/c9a129c82ddf82a50b4f8960d2609714ca2dbd26"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/e258ed369c9e04caa7d2fd49785d753ae4034cb6"}],"sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-476"}],"source":"nvd@nist.gov","type":"Primary"}]},"severity":"MEDIUM","source":"nvd","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix oops due to invalid pointer for kfree(..."}