CVE-2017-18193

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-02-22 · updated 2026-06-17
Weakness: CWE-119

Description

fs/f2fs/extent_cache.c in the Linux kernel before 4.13 mishandles extent trees, which allows local users to cause a denial of service (BUG) via an application with multiple threads.

Affected products

Linux kernel: before 4.13 — fixed in 4.13

How to fix

Upgrade to a fixed version: Linux kernel 4.13. Check the vendor advisory for mitigations.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dad48e73127ba10279ea33e6dbc8d3905c4d31c0
http://www.securityfocus.com/bid/103147
https://github.com/torvalds/linux/commit/dad48e73127ba10279ea33e6dbc8d3905c4d31c0
https://usn.ubuntu.com/3654-1/
https://usn.ubuntu.com/3654-2/
https://usn.ubuntu.com/3656-1/
https://www.debian.org/security/2018/dsa-4188
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dad48e73127ba10279ea33e6dbc8d3905c4d31c0
http://www.securityfocus.com/bid/103147
https://github.com/torvalds/linux/commit/dad48e73127ba10279ea33e6dbc8d3905c4d31c0
https://usn.ubuntu.com/3654-1/
https://usn.ubuntu.com/3654-2/

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