Description
A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files before 4.9.10. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | kernel | 4.9.10 | — |
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 | 4.9.10-1 | — |
| Debian 13 | linux | 4.9.10-1 | — |
| Debian 12 | linux | 4.9.10-1 | — |
| Debian 8 | linux | 3.16.39-1+deb8u1 | DSA-3791-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-67.88 | — |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1009.18 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.10.0-32.36~16.04.1 | USN-3361-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1048.55 | — |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1051.55 | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-126.175 | USN-3381-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-67.88~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-514.16.1.rt56.437.el7 | RHSA-2017:0931 |
| RHEL 7 | perf +18 | 3.10.0-514.16.1.el7 | RHSA-2017:0933 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-514.rt56.219.el6rt | RHSA-2017:0932 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-103.9.4.el7uek | ELSA-2017-3640 |
| Oracle Linux 7 | perf +11 | 3.10.0-514.16.1.el7 | ELSA-2017-0933 |
Advisories 8
- RHSA-2017:0933 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0931 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0932 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-3361-1 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3381-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3791-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2017-3640 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 13, 2017
- ELSA-2017-0933 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 12, 2017
References
- [selinux] 20170131 [PATCH] selinux: fix off-by-one in setprocattr mailing-list
- DSA-3791 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2618
- RHSA-2017:0932 vendor-advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0c461cb727d146c9ef2d3e86214f498b78b7d125
- RHSA-2017:0933 vendor-advisory
- RHSA-2017:0931 vendor-advisory
- 96272 vdb-entry