Description
The hash_accept function in crypto/algif_hash.c in the Linux kernel before 4.3.6 allows local users to cause a denial of service (OOPS) by attempting to trigger use of in-kernel hash algorithms for a socket that has received zero bytes of data.
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 | 4.4.2-1 | — |
| Debian 13 | linux | 4.4.2-1 | — |
| Debian 12 | linux | 4.4.2-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-77.121 | — |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-49.55~14.04.1 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-514.21.1.rt56.438.el7 | RHSA-2017:1298 |
| RHEL 7 | perf +18 | 3.10.0-514.21.1.el7 | RHSA-2017:1308 |
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.rt56.221.el6rt | RHSA-2017:1297 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | kernel-docs | 3.0.101-94.2 | SUSE-SU-2017:0437-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-94.1 | SUSE-SU-2017:0437-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.96.1 | SUSE-SU-2017:0494-1 |
| SLES 11 SP2 | kernel-ec2 +6 | 3.0.101-0.7.53.1 | SUSE-SU-2017:0333-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-94.1 | SUSE-SU-2017:0437-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-68.1 | SUSE-SU-2017:1102-1 |
| SUSE OpenStack Cloud 5 | kernel-ec2 +6 | 3.0.101-0.47.96.1 | SUSE-SU-2017:0494-1 |
| SUSE Manager Proxy 2.1 | kernel-ec2 +6 | 3.0.101-0.47.96.1 | SUSE-SU-2017:0494-1 |
| SUSE Manager 2.1 | kernel-ec2 +6 | 3.0.101-0.47.96.1 | SUSE-SU-2017:0494-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.96.1 | SUSE-SU-2017:0494-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.16.3.el6uek | 0.4.5-3.el6 | ELSA-2017-3515 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.16.3.el7uek | 0.4.5-3.el7 | ELSA-2017-3515 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.27.el6uek | 0.5.3-2.el6 | ELSA-2017-3514 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.27.el7uek | 0.5.3-2.el7 | ELSA-2017-3514 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.16.3.el7uek | ELSA-2017-3515, ELSA-2017-3514 |
| Oracle Linux 7 | perf +11 | 3.10.0-514.21.1.el7 | ELSA-2017-1308 |
Advisories 10
- RHSA-2017:1308 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2017:1298 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2017:1297 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- SUSE-SU-2017:1102-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0494-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0333-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0437-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-1308 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 26, 2017
- ELSA-2017-3515 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 9, 2017
- ELSA-2017-3514 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 6, 2017
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1388821
- RHSA-2017:1308 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4afa5f9617927453ac04b24b584f6c718dfb4f45
- 94309 vdb-entry
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.6
- https://github.com/torvalds/linux/commit/4afa5f9617927453ac04b24b584f6c718dfb4f45
- RHSA-2017:1298 vendor-advisory
- [oss-security] 20161115 CVE-2016-8646: linux kernel - oops in shash_async_export() mailing-list
- RHSA-2017:1297 vendor-advisory