CVE-2017-10663

Severity: high (CVSS 7.8 v3.1)
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: 2017-08-19 · updated 2026-06-17
Weakness: CWE-129

Description

The sanity_check_ckpt function in fs/f2fs/super.c in the Linux kernel before 4.12.4 does not validate the blkoff and segno arrays, which allows local users to gain privileges via unspecified vectors.

Affected products

Linux kernel: from 3.8 before 3.18.64; from 3.19 before 4.1.44; from 4.2 before 4.4.81; from 4.5 before 4.9.42; from 4.10 before 4.12.4 — fixed in 3.18.64, 4.1.44, 4.12.4, 4.4.81, 4.9.42

How to fix

Upgrade to a fixed version: Linux kernel 3.18.64, 4.1.44, 4.12.4, 4.4.81. Check the vendor advisory for mitigations.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=15d3042a937c13f5d9244241c7a9c8416ff6e82a
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.12.4
http://www.securityfocus.com/bid/100215
https://bugzilla.redhat.com/show_bug.cgi?id=1481149
https://github.com/torvalds/linux/commit/15d3042a937c13f5d9244241c7a9c8416ff6e82a
https://source.android.com/security/bulletin/2017-08-01
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=15d3042a937c13f5d9244241c7a9c8416ff6e82a
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.12.4
http://www.securityfocus.com/bid/100215
https://bugzilla.redhat.com/show_bug.cgi?id=1481149
https://github.com/torvalds/linux/commit/15d3042a937c13f5d9244241c7a9c8416ff6e82a
https://source.android.com/security/bulletin/2017-08-01

Get alerted when CVE-2017-10663 or the next vulnerability affects your stack