Description
The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
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 | 4.12.12-1 | — |
| Debian 13 | linux | 4.12.12-1 | — |
| Debian 12 | linux | 4.12.12-1 | — |
| Debian 9 | linux | 4.9.30-2+deb9u5 | DSA-3981-1 |
| Debian 8 | linux | 3.16.43-2+deb8u5 | DSA-3981-1 |
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 | 4.4.0-97.120 | USN-3444-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1038.47 | USN-3444-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.13.0-1005.7 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1002.5 | — |
| Ubuntu 16.04 LTS | linux-gke | 4.4.0-1032.32 | USN-3444-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-32.35~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1008.13 | USN-3444-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1075.83 | USN-3444-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1077.82 | USN-3444-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-149.199 | USN-3655-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-97.120~14.04.1 | USN-3444-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-docs | 4.4.92-6.18.3 | SUSE-SU-2017:2847-1 |
| SLES 12 SP3 | kernel-syms +3 | 4.4.92-6.18.1 | SUSE-SU-2017:2847-1 |
| SLES 12 SP2 | kernel-docs | 4.4.90-92.45.3 | SUSE-SU-2017:2869-1 |
| SLES 12 SP2 | kernel-syms +3 | 4.4.90-92.45.1 | SUSE-SU-2017:2869-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.92-6.18.1 | SUSE-SU-2017:2847-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.90-92.45.1 | SUSE-SU-2017:2869-1 |
| SLE Real Time 12 SP2 | kernel-rt +3 | 4.4.88-18.1 | SUSE-SU-2017:2956-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_4 | 1-4.3 | SUSE-SU-2017:2847-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_14 | 1-2.4 | SUSE-SU-2017:2869-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.19.7.el6uek | 0.4.5-3.el6 | ELSA-2017-3621 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.19.7.el7uek | 0.4.5-3.el7 | ELSA-2017-3621 |
| Oracle Linux 7 | dtrace-modules-4.1.12-103.3.8.el6uek | 0.6.1-3.el6 | ELSA-2017-3609 |
| Oracle Linux 7 | dtrace-modules-shared-headers +2 | 0.6.1-3.el7 | ELSA-2017-3609 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.19.7.el7uek | ELSA-2017-3621, ELSA-2017-3609 |
Advisories 10
- USN-3655-1 linux vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3444-1 linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3981-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1099-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3444-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:2956-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2869-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2847-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-3621 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 20, 2017
- ELSA-2017-3609 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 23, 2017
References
- https://support.citrix.com/article/CTX225941
- 1039176 vdb-entry
- http://xenbits.xen.org/xsa/advisory-229.html
- DSA-3981 vendor-advisory
- USN-3655-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1477656
- GLSA-201801-14 vendor-advisory
- USN-3655-2 vendor-advisory
- [oss-security] 20170815 Xen Security Advisory 229 (CVE-2017-12134) - linux: Fix Xen block IO merge-ability calculation mailing-list
- 100343 vdb-entry