Description
A flaw was found in the Linux kernel's handle_rx() function in the [vhost_net] driver. A malicious virtual guest, under specific conditions, can trigger an out-of-bounds write in a kmalloc-8 slab on a virtual host which may lead to a kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out. Versions from v4.16 and newer are vulnerable.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Linux Foundation | kernel | from v4.16 and newer | — |
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 | 4.19.20-1 | — |
| Debian 13 | linux | 4.19.20-1 | — |
| Debian 12 | linux | 4.19.20-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | linux-azure | 4.18.0-1013.13~18.04.1 | USN-3903-2 |
| Ubuntu 18.04 LTS | linux-gcp-edge | 4.18.0-1007.8~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe | 4.18.0-16.17~18.04.1 | USN-3903-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.4.1 | SUSE-SU-2019:1550-1 |
| SLES 15 | kernel-azure +2 | 4.12.14-5.27.1 | SUSE-SU-2019:1240-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.17.1 | SUSE-SU-2019:1244-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.12.1 | SUSE-SU-2019:1242-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.16.1 | SUSE-SU-2019:1241-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.12.1 | SUSE-SU-2019:1242-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.16.1 | SUSE-SU-2019:1241-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.4.1 | SUSE-SU-2019:1550-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_1 | 1-3.3.1 | SUSE-SU-2019:1550-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.17.1 | SUSE-SU-2019:1244-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_10 | 1-1.3.1 | SUSE-SU-2019:1244-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_4 | 1-6.3.1 | SUSE-SU-2019:1241-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.8.1 | SUSE-SU-2019:2430-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.0 | kernel-docs +8 | 4.12.14-lp150.12.61.1 | openSUSE-SU-2019:1404-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.10.78.1-1 | — |
Advisories 8
- USN-3903-2 linux-hwe, linux-azure vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:1242-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1241-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1550-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1240-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2430-1 Security update for kernel-source-rt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1244-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1404-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-3903-2 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16880
- 106735 vdb-entry
- USN-3903-1 vendor-advisory
- https://support.f5.com/csp/article/K03593314
- openSUSE-SU-2019:1404 vendor-advisory