Description
An issue was discovered in the Linux kernel before 4.8. Incorrect access checking in overlayfs mounts could be used by local attackers to modify or truncate files in the underlying filesystem.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.8.5-1 | — |
| Debian 13 | linux | 4.8.5-1 | — |
| Debian 12 | linux | 4.8.5-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +18 | 3.10.0-514.el7 | RHSA-2016:2574 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-azure | 4.4.162-4.19.2 | SUSE-SU-2019:0095-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.156-94.57.1 | SUSE-SU-2018:3003-1 |
| SLES 12 SP3 | kernel-syms-azure +1 | 4.4.162-4.19.1 | SUSE-SU-2019:0095-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-azure | 4.4.162-4.19.2 | SUSE-SU-2019:0095-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.156-94.57.1 | SUSE-SU-2018:3003-1 |
| SLES for SAP 12 SP3 | kernel-syms-azure +1 | 4.4.162-4.19.1 | SUSE-SU-2019:0095-1 |
| SLE Real Time 12 SP3 | kernel-rt +3 | 4.4.162-3.26.1 | SUSE-SU-2018:3659-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_18 | 1-4.3.5 | SUSE-SU-2018:3004-1 |
Advisories 5
- RHSA-2016:2574 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- SUSE-SU-2018:3004-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3003-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3659-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0095-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
References
- 105394 vdb-entry
- https://security.netapp.com/advisory/ntap-20190204-0001/
- https://bugzilla.suse.com/show_bug.cgi?id=1106512
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c0ca3d70e8d3cf81e2255a217f7ca402f5ed0862
- https://support.f5.com/csp/article/K22691834
- openSUSE-SU-2018:3202 vendor-advisory
- 20190722 [slackware-security] Slackware 14.2 kernel (SSA:2019-202-01) mailing-list
- http://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html