PatchTheCVECVE-2018-15157: The libfsclfs_block_read function in libfsclfs_block.c in libfsclfs before 2018-07-25 allows remote attackers
CVE-2018-15157 is a medium-severity flaw (CVSS 6.5) affecting libfsclfs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The libfsclfs_block_read function in libfsclfs_block.c in libfsclfs before 2018-07-25 allows remote attackers to cause a heap-based buffer over-read via a crafted clfs file. NOTE: the vendor has disputed this as described in the GitHub issue comments
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 1.5% (top 27%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2018-09-01 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-15157?
libfsclfs: upgrade to 2018-07-25. Exact commands for each OS are on this page.
Is CVE-2018-15157 being exploited?
CVE-2018-15157 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-15157 affect?
CVE-2018-15157 affects libfsclfs. Severity is medium (CVSS 6.5). The libfsclfs_block_read function in libfsclfs_block.c in libfsclfs before 2018-07-25 allows remote attackers to cause a heap-based buffer over-read via a crafted clfs file. NOTE: the vendor has disputed this as described in the GitHub issu
How urgent is CVE-2018-15157?
Priority 46/100. Public exploit reference