CVE catalog
CVE-2020-25601
xen: CVE-2020-25601
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.42% · Oct 25, 2026
An issue was discovered in Xen through 4.14.x. There is a lack of preemption in evtchn_reset() / evtchn_destroy(). In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these (when resetting all event channels or when cleaning up after the guest) may take extended periods of time. So far, there was no arrangement for preemption at suitable intervals, allowing a CPU to spend an almost unbounded amount of time in the processing of these operations. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system. All Xen versions are vulnerable in principle. Whether versions 4.3 and older are vulnerable depends on underlying hardware characteristics.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | xen | sid | 4.20.4+39-gf1e1321c87-1 | fixed |
| Debian | xen | forky | 4.20.4+39-gf1e1321c87-1 | fixed |
| Debian | xen | trixie | 4.20.3+127-gc42374a105-0+deb13u1 | fixed |
| Debian | xen | trixie-security | 4.20.4+39-gf1e1321c87-0+deb13u1 | fixed |
| Debian | xen | bookworm | 4.17.5+72-g01140da4e8-1 | fixed |
| Debian | xen | bookworm-security | 4.17.7-0+deb12u1 | fixed |
| Alpine | xen | 3.10 | 4.12.3-r4 | fixed |
| Alpine | xen | 3.11 | 4.13.1-r4 | fixed |
| Alpine | xen | 3.12 | 4.13.1-r4 | fixed |
| Alpine | xen | 3.13 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.14 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.15 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.16 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.17 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.18 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.19 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.20 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.21 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.22 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.23 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.24 | 4.14.0-r1 | fixed |
| Alpine | xen | 3.9 | 4.11.4-r2 | fixed |
| Ubuntu | xen | 16.04 | 4.5.1-0ubuntu1 | vulnerable |
| Ubuntu | xen | 16.04 | 4.5.1-0ubuntu2 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.0-1ubuntu1 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.0-1ubuntu2 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.0-1ubuntu4 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.0-1ubuntu4.1 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.0-1ubuntu4.2 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.0-1ubuntu4.3 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.5-0ubuntu1 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.5-0ubuntu1.1 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.5-0ubuntu1.2 | vulnerable |
| Ubuntu | xen | 16.04 | 4.6.5-0ubuntu1.4 | vulnerable |
| Ubuntu | xen | 18.04 | 4.9.0-0ubuntu3 | vulnerable |
| Ubuntu | xen | 18.04 | 4.9.0-0ubuntu4 | vulnerable |
| Ubuntu | xen | 18.04 | 4.9.2-0ubuntu1 | vulnerable |
| Ubuntu | xen | 20.04 | 4.9.2-0ubuntu2 | vulnerable |
| Ubuntu | xen | 20.04 | 4.9.2-0ubuntu6 | vulnerable |
| Ubuntu | xen | 20.04 | 4.9.2-0ubuntu7 | vulnerable |
| Ubuntu | xen | 20.04 | 4.11.3+24-g14b62ab3e5-1ubuntu1 | vulnerable |
| Ubuntu | xen | 20.04 | 4.11.3+24-g14b62ab3e5-1ubuntu2 | vulnerable |
| Ubuntu | xen | 20.04 | 4.11.3+24-g14b62ab3e5-1ubuntu2.2 | vulnerable |
| Ubuntu | xen | 20.04 | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | xen | source | sid | 4.14.0+80-gd101b417b7-1 | not yet assigned | Not reported | Not reported |
| Debian | xen | source | forky | 4.14.0+80-gd101b417b7-1 | not yet assigned | Not reported | Not reported |
| Debian | xen | source | trixie | 4.14.0+80-gd101b417b7-1 | not yet assigned | Not reported | Not reported |
| Debian | xen | source | bookworm | 4.14.0+80-gd101b417b7-1 | not yet assigned | Not reported | Not reported |
| Alpine | xen | apk | 3.10 | 4.12.3-r4 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.11 | 4.13.1-r4 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.12 | 4.13.1-r4 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.13 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.14 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.15 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.16 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.17 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.18 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.19 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.20 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.21 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.22 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.23 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.24 | 4.14.0-r1 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Alpine | xen | apk | 3.9 | 4.11.4-r2 | Not reported | ALPINE-CVE-2020-25601 | Not reported |
| Ubuntu | xen | deb | 20.04 | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 | Not reported | UBUNTU-CVE-2020-25601 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [libxencall1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxen-dev]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxendevicemodel1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxenevtchn1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxenforeignmemory1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxengnttab1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxenhypfs1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxenmisc4.17]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxenstore4]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxentoolcore1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [libxentoollog1]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-doc]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-hypervisor-4.17-amd64]Unknown
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-hypervisor-4.17-amd64-dbg]Unknown
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-hypervisor-4.17-arm64]Unknown
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-hypervisor-4.17-arm64-dbg]Unknown
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-hypervisor-common]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xenstore-utils]Unknown
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-system-amd64]Unknown
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· amd64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
- [xen-system-arm64]Unknown
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· arm64 · bookwormFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityFixed · Fixed:
4.14.0+80-gd101b417b7-1dsa · xen · debian · bookworm; dsa · xen · debian · 12
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2020_14521-1.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2020-25601]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-25601]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-25601]
- [https://security-tracker.debian.org/tracker/CVE-2020-25601]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]