Description
Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.
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 | 4.5.2-1 | — |
| Debian 13 | linux | 4.5.2-1 | — |
| Debian 12 | linux | 4.5.2-1 | — |
| Debian 8 | linux | 3.16.7-ckt25-2+deb8u2 | DSA-3607-1 |
| Debian 7 | linux | 3.2.81-1 | DLA-516-1 |
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 16.04 LTS | linux | 4.4.0-24.43 | USN-3006-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1012.16 | USN-3007-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1015.18 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-101.148 | USN-3127-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-61.69~14.04.1 | USN-3001-1 |
| Ubuntu 14.04 LTS | linux-lts-wily | 4.2.0-38.45~14.04.1 | USN-3002-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-24.43~14.04.1 | USN-3005-1 |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Advisories 8
- USN-3127-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3006-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-516-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3607-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3001-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3002-1 linux-lts-wily vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3005-1 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3007-1 linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- http://xenbits.xen.org/xsa/xsa174.patch
- USN-3006-1 vendor-advisory
- USN-3004-1 vendor-advisory
- USN-3001-1 vendor-advisory
- http://xenbits.xen.org/xsa/advisory-174.html
- USN-3005-1 vendor-advisory
- 1035569 vdb-entry
- USN-3049-1 vendor-advisory
- DSA-3607 vendor-advisory
- USN-3002-1 vendor-advisory
- USN-3050-1 vendor-advisory
- USN-3007-1 vendor-advisory
- USN-3003-1 vendor-advisory
- 86068 vdb-entry