Answer in brief
CVE-2026-23201 records a Medium severity (CVSS 5.5) vulnerability in ceph: fix oops due to invalid pointer for kfree() in parse_longname(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4b9aee707c4580511983a0998547f3b28514e6a6 <c9a129c82ddf82a50b4f8960d2609714ca2dbd26 || >=bb80f7618832d26f7e395f52f82b1dac76223e5f <8c9af7339de419819cfc641d551675d38ff99abf || >=101841c38346f4ca41dc1802c867da990ffb32eb <e258ed369c9e04caa7d2fd49785d753ae4034cb6 || >=101841c38346f4ca41dc1802c867da990ffb32eb <bc8dedae022ce3058659c3addef3ec4b41d15e00 || 3145b2b11492d61c512bbc59660bb823bc757f48 || 493479af8af3ab907f49e99323777d498a4fbd2b || >=6.12.42 <6.12.70 || >=6.15.10 <6.16 || >=6.16.1 <6.17 | c9a129c82ddf82a50b4f8960d2609714ca2dbd26, 8c9af7339de419819cfc641d551675d38ff99abf, e258ed369c9e04caa7d2fd49785d753ae4034cb6, bc8dedae022ce3058659c3addef3ec4b41d15e00, 6.12.70, 6.16, 6.17 |
| Linux/Linuxgeneric | 6.17 | Not reported |
Published upstream
Feb 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 14, 2026
In the Linux kernel, the following vulnerability has been resolved: ceph: fix oops due to invalid pointer for kfree() in parse_longname() This fixes a kernel oops when reading ceph snapshot directories (.snap), for example by simply running `ls /mnt/my_ceph/.snap`. The variable str is guarded by __free(kfree), but advanced by one for skipping the initial '_' in snapshot names. Thus, kfree() is called with an invalid pointer. This patch removes the need for advancing the pointer so kfree() is called with correct memory pointer. Steps to reproduce: 1. Create snapshots on a cephfs volume (I've 63 snaps in my testcase) 2. Add cephfs mount to fstab $ echo "[email protected]=/volumes/datapool/stuff/3461082b-ecc9-4e82-8549-3fd2590d3fb6 /mnt/test/stuff ceph acl,noatime,_netdev 0 0" >> /etc/fstab 3. Reboot the system $ systemctl reboot 4. Check if it's really mounted $ mount | grep stuff 5. List snapshots (expected 63 snapshots on my system) $ ls /mnt/test/stuff/.snap Now ls hangs forever and the kernel log shows the oops.
Quoted source text, attributed separately from HOL analysis.