Description
In the Linux kernel before version 4.12, Kerberos 5 tickets decoded when using the RXRPC keys incorrectly assumes the size of a field. This could lead to the size-remaining variable wrapping and the data pointer going over the end of the buffer. This could possibly lead to memory corruption and possible privilege escalation.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | kernel: | 4.12 | — |
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 | 4.11.11-1 | — |
| Debian 13 | linux | 4.11.11-1 | — |
| Debian 12 | linux | 4.11.11-1 | — |
| Debian 9 | linux | 4.9.30-2+deb9u3 | DSA-3927-1 |
| Debian 8 | linux | 3.16.43-2+deb8u3 | DSA-3945-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | linux | 3.2.93-1 | DLA-1099-1 |
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 | 4.4.0-89.112 | USN-3378-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1028.37 | USN-3378-1 |
| Ubuntu 16.04 LTS | linux-gke | 4.4.0-1024.24 | USN-3378-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.10.0-32.36~16.04.1 | USN-3377-2 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1067.75 | USN-3378-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1069.74 | USN-3378-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-126.175 | USN-3381-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-89.112~14.04.1 | USN-3378-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-693.46.1.rt56.639.el6rt | RHSA-2019:0641 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-docs +4 | 4.4.103-6.33.1 | SUSE-SU-2017:3398-1 |
| SLES 12 SP2 | kernel-docs +4 | 4.4.103-92.53.1 | SUSE-SU-2017:3410-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.63.1 | SUSE-SU-2017:2908-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_22 | 1-2.1 | SUSE-SU-2017:2908-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.101.1 | SUSE-SU-2017:2920-1, SUSE-SU-2017:2908-1 |
| SLES 12 | kgraft-patch-SLE12_Update_28 | 1-8.1 | SUSE-SU-2017:2920-1 |
| SLES 11 SP4 | cluster-network | 1.4-2.32.2.14 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | drbd | 8.4.4-0.27.2.1 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | drbd-kmp | 8.4.4-0.27.2.13 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | gfs2 | 2-0.24.2.14 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-108.7.2 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.7.1 | SUSE-SU-2017:2389-1 |
| SLES 11 SP4 | ocfs2 | 1.6-0.28.3.4 | SUSE-SU-2017:2389-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.5.1 | SUSE-SU-2017:2525-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.103-6.33.1 | SUSE-SU-2017:3398-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.103-92.53.1 | SUSE-SU-2017:3410-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.63.1 | SUSE-SU-2017:2908-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_22 | 1-2.1 | SUSE-SU-2017:2908-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.7.1 | SUSE-SU-2017:2389-1 |
| SLE Real Time 12 SP2 | kernel-rt +3 | 4.4.104-24.1 | SUSE-SU-2018:0213-1 |
| SLE Real Time 11 SP4 | cluster-network | 1.4-2.32.2.14 | SUSE-SU-2017:2389-1 |
| SLE Real Time 11 SP4 | drbd-kmp | 8.4.4-0.27.2.13 | SUSE-SU-2017:2389-1 |
| SLE Real Time 11 SP4 | gfs2 | 2-0.24.2.14 | SUSE-SU-2017:2389-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.5.1 | SUSE-SU-2017:2342-1 |
| SLE Real Time 11 SP4 | ocfs2 | 1.6-0.28.3.4 | SUSE-SU-2017:2389-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_6 | 1-4.3.1 | SUSE-SU-2017:3398-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_16 | 1-3.3.1 | SUSE-SU-2017:3410-1 |
| SUSE OpenStack Cloud 6 | kernel-xen +3 | 3.12.74-60.64.63.1 | SUSE-SU-2017:2908-1 |
| SUSE OpenStack Cloud 6 | kgraft-patch-SLE12-SP1_Update_22 | 1-2.1 | SUSE-SU-2017:2908-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.5.1 | SUSE-SU-2017:2525-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.20.3.el6uek | 0.4.5-3.el6 | ELSA-2018-4040 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.20.3.el7uek | 0.4.5-3.el7 | ELSA-2018-4040 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.20.3.el7uek | ELSA-2018-4040, ELSA-2017-3635 |
Advisories 18
- RHSA-2019:0641 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 8, 2026
- USN-3381-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3378-1 linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3945-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3927-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1099-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3377-2 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3378-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:3410-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2389-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0213-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2525-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3398-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2908-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2920-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2342-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2018-4040 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 26, 2018
- ELSA-2017-3635 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 2, 2017
References
- 99299 vdb-entry
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f2f97656ada8d811d3c1bef503ced266fcd53a0
- 1038787 vdb-entry
- DSA-3927 vendor-advisory
- DSA-3945 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7482
- [oss-security] 20170626 CVE-2017-7482 Linux kernel: krb5 ticket decode len check. mailing-list
- RHSA-2019:0641 vendor-advisory