Description
The slhc_init function in drivers/net/slip/slhc.c in the Linux kernel through 4.2.3 does not ensure that certain slot numbers are valid, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call.
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 | 4.2.6-2 | — |
| Debian 13 | linux | 4.2.6-2 | — |
| Debian 12 | linux | 4.2.6-2 | — |
| Debian 8 | linux | 3.16.7-ckt20-1+deb8u1 | DSA-3426-1 |
| Debian 7 | linux | 3.2.73-2+deb7u1 | DSA-3426-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze17 | DLA-360-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-73.116 | USN-2841-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-56.75~14.04.1 | USN-2844-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-41.46~14.04.2 | USN-2842-2 |
| Ubuntu 14.04 LTS | linux-lts-wily | 4.2.0-21.25~14.04.1 | USN-2843-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-obs-build | 3.12.51-60.20.1 | SUSE-SU-2016:0585-1, SUSE-SU-2015:2292-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.51-60.20.2 | SUSE-SU-2016:0585-1, SUSE-SU-2015:2292-1 |
| SLES 12 SP1 | lttng-modules | 2.7.0-3.1 | SUSE-SU-2016:0585-1 |
| SLES 12 | kernel-docs | 3.12.51-52.31.5 | SUSE-SU-2015:2194-1 |
| SLES 12 | kernel-ec2 +5 | 3.12.51-52.31.1 | SUSE-SU-2016:0585-1, SUSE-SU-2015:2292-1, SUSE-SU-2015:2194-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-68.2 | SUSE-SU-2015:2339-1 |
| SLES 11 SP4 | kernel-ec2 +7 | 3.0.101-68.1 | SUSE-SU-2015:2339-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
| SLES 11 SP2 | kernel-ec2 +6 | 3.0.101-0.7.40.1 | SUSE-SU-2016:2074-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.51-60.20.2 | SUSE-SU-2016:0585-1, SUSE-SU-2015:2292-1 |
| SLES for SAP 12 SP1 | lttng-modules | 2.7.0-3.1 | SUSE-SU-2016:0585-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.51-52.31.1 | SUSE-SU-2015:2194-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +7 | 3.0.101-68.1 | SUSE-SU-2015:2339-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-48.1 | SUSE-SU-2015:2350-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_1 | 1-4.1 | SUSE-SU-2015:2292-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_3 | 1-2.1 | SUSE-SU-2016:0585-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_9 | 1-2.2 | SUSE-SU-2015:2194-1 |
| SUSE OpenStack Cloud 5 | kernel-ec2 +6 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
| SUSE Manager Proxy 2.1 | kernel-ec2 +6 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
| SUSE Manager 2.1 | kernel-ec2 +6 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
Advisories 13
- USN-2842-2 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-2843-2 linux-lts-wily vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-2844-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-2841-1 linux vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- DLA-360-1 linux-2.6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3426-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:0585-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2194-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2339-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2074-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2292-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1203-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2350-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
References
- SUSE-SU-2015:2292 vendor-advisory
- USN-2841-2 vendor-advisory
- 77033 vdb-entry
- SUSE-SU-2015:2350 vendor-advisory
- 1033809 vdb-entry
- https://code.google.com/p/android/issues/detail?id=187973
- USN-2886-1 vendor-advisory
- USN-2843-1 vendor-advisory
- SUSE-SU-2015:2194 vendor-advisory
- USN-2844-1 vendor-advisory
- openSUSE-SU-2015:2232 vendor-advisory
- USN-2842-2 vendor-advisory
- USN-2843-2 vendor-advisory
- SUSE-SU-2015:2339 vendor-advisory
- USN-2842-1 vendor-advisory
- [oss-security] 20151010 Re: CVE request - Android OS - Using the PPP character device driver caused the system to restart - Linux kernel mailing-list
- SUSE-SU-2016:2074 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1271134
- USN-2841-1 vendor-advisory
- DSA-3426 vendor-advisory
- USN-2843-3 vendor-advisory
- openSUSE-SU-2016:1008 vendor-advisory