Description
An issue was discovered in drivers/net/ethernet/arc/emac_main.c in the Linux kernel before 4.5. A use-after-free is caused by a race condition between the functions arc_emac_tx and arc_emac_tx_clean.
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 | 4.5.1-1 | — |
| Debian 13 | linux | 4.5.1-1 | — |
| Debian 12 | linux | 4.5.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | linux-vmware | No fix yet | — |
| 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 +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1053.57 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-166.195 | USN-4163-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1096.107 | USN-4163-1 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1060.67 | USN-4163-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1124.133 | USN-4163-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1128.136 | USN-4163-1 |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1023.28 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1056.60 | USN-4163-2 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-166.195~14.04.1 | USN-4163-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.125.1 | SUSE-SU-2019:2984-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_33 | 1-3.5.1 | SUSE-SU-2019:2984-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.124.1 | SUSE-SU-2019:2950-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_37 | 1-2.3.1 | SUSE-SU-2019:2950-1 |
| SLES 12 | kernel-ec2 | 3.12.74-60.64.124.1 | SUSE-SU-2019:2950-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.125.1 | SUSE-SU-2019:2984-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_33 | 1-3.5.1 | SUSE-SU-2019:2984-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.124.1 | SUSE-SU-2019:2950-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_37 | 1-2.3.1 | SUSE-SU-2019:2950-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.125.1 | SUSE-SU-2019:2984-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_33 | 1-3.5.1 | SUSE-SU-2019:2984-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.107.1 | SUSE-SU-2019:2949-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_29 | 1-4.3.1 | SUSE-SU-2019:2949-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.43.4.el7uek | ELSA-2020-5866 |
Advisories 6
- USN-4163-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 9, 2026
- USN-4163-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Sep 9, 2026
- SUSE-SU-2019:2950-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2949-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2984-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2020-5866 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c278c253f3d992c6994d08aa0efb2b6806ca396f
- https://support.f5.com/csp/article/K01993501?utm_source=f5support&%3Butm_medium=RSS
- USN-4163-1 vendor-advisory
- USN-4163-2 vendor-advisory
- 20191108 [slackware-security] Slackware 14.2 kernel (SSA:2019-311-01) mailing-list
- http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html