Description
The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allows local guest administrators to generate a continuous stream of WARN messages and cause a denial of service (disk consumption) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and XEN_PCI_OP_enable_msi operations, aka "Linux pciback missing sanity checks."
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 | 4.3.3-3 | — |
| Debian 13 | linux | 4.3.3-3 | — |
| Debian 12 | linux | 4.3.3-3 | — |
| Debian 8 | linux | 3.16.7-ckt20-1+deb8u2 | DSA-3434-1 |
| Debian 7 | linux | 3.2.73-2+deb7u2 | DSA-3434-1 |
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 | 3.13.0-74.118 | USN-2848-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-57.77~14.04.1 | USN-2849-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-42.48~14.04.1 | USN-2854-1 |
| Ubuntu 14.04 LTS | linux-lts-wily | 4.2.0-22.27~14.04.1 | USN-2853-1 |
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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-docs | 3.12.62-60.62.3 | SUSE-SU-2016:2105-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.62-60.62.1 | SUSE-SU-2016:2105-1 |
| SLES 12 | kernel-docs | 3.12.51-52.34.3 | SUSE-SU-2016:0168-1 |
| SLES 12 | kernel-ec2 +5 | 3.12.51-52.34.1 | SUSE-SU-2016:2105-1, SUSE-SU-2016:0168-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-71.2 | SUSE-SU-2016:0911-1 |
| SLES 11 SP4 | kernel-ec2 +7 | 3.0.101-71.1 | SUSE-SU-2016:0911-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.62-60.62.1 | SUSE-SU-2016:2105-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.51-52.34.1 | SUSE-SU-2016:0168-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +7 | 3.0.101-71.1 | SUSE-SU-2016:0911-1 |
| SLE Real Time 12 SP1 | kernel-rt +5 | 3.12.58-14.1 | SUSE-SU-2016:1937-1, SUSE-SU-2016:1764-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-51.1 | SUSE-SU-2016:1707-1, SUSE-SU-2016:1102-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_7 | 1-4.2 | SUSE-SU-2016:2105-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_10 | 1-2.1 | SUSE-SU-2016:0168-1 |
| 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-2848-1 linux vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-2849-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-2853-1 linux-lts-wily vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-2854-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- DSA-3434-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:1937-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1764-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0911-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2105-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1707-1 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-2016:1102-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0168-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
References
- http://xenbits.xen.org/xsa/advisory-157.html
- 1034480 vdb-entry
- openSUSE-SU-2016:2184 vendor-advisory
- SUSE-SU-2016:1764 vendor-advisory
- SUSE-SU-2016:1102 vendor-advisory
- SUSE-SU-2016:1707 vendor-advisory
- GLSA-201604-03 vendor-advisory
- SUSE-SU-2016:2105 vendor-advisory
- DSA-3434 vendor-advisory
- 79546 vdb-entry
- SUSE-SU-2016:1937 vendor-advisory
- SUSE-SU-2016:0911 vendor-advisory