CVE catalog
CVE-2026-42493
Addressing certain issues, in particular related to operations which may take excessively long and therefore would need preemption, has turned out overly costly. Since alternatives (HVM/PVH: HAP, PV:
- 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
- 0.45% · Oct 25, 2026
Addressing certain issues, in particular related to operations which may take excessively long and therefore would need preemption, has turned out overly costly. Since alternatives (HVM/PVH: HAP, PV: shim) are commonly available, the decision was to deprecate the functionality, while still retaining it for people to use at their own (security) risk. Memory-wise small enough guests may still be okay to run.
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 | vulnerable |
| Debian | xen | bookworm-security | 4.17.7-0+deb12u1 | fixed |
| Alpine | xen | 3.21 | 4.19.6-r0 | fixed |
| Alpine | xen | 3.22 | 4.20.4-r0 | fixed |
| Alpine | xen | 3.23 | 4.20.4-r0 | fixed |
| Alpine | xen | 3.24 | 4.21.2-r0 | fixed |
| Suse | xen | linux enterprise module for basesystem 15 sp7 | 4.20.4_04-150700.3.46.1 | fixed |
| Suse | xen | linux enterprise module for server applications 15 sp7 | 4.20.4_04-150700.3.46.1 | fixed |
| Suse | xen | linux enterprise micro 5.3 | 4.16.7_12-150400.4.89.3 | fixed |
| Suse | xen | linux enterprise micro 5.4 | 4.16.7_12-150400.4.89.3 | fixed |
| Suse | xen | linux enterprise high performance computing 15 sp4-espos | 4.16.7_12-150400.4.89.3 | fixed |
| Suse | xen | linux enterprise high performance computing 15 sp4-ltss | 4.16.7_12-150400.4.89.3 | fixed |
| Suse | xen | linux enterprise server 15 sp4-ltss | 4.16.7_12-150400.4.89.3 | fixed |
| Suse | xen | linux enterprise server for sap applications 15 sp4 | 4.16.7_12-150400.4.89.3 | fixed |
| Suse | xen | linux enterprise server 12 sp5-ltss | 4.12.4_72-3.148.4 | fixed |
| Suse | xen | linux enterprise server ltss extended security 12 sp5 | 4.12.4_72-3.148.4 | fixed |
| Suse | xen | linux enterprise server 15 sp6-ltss | 4.18.5_20-150600.3.53.3 | fixed |
| Suse | xen | linux enterprise server for sap applications 15 sp6 | 4.18.5_20-150600.3.53.3 | fixed |
| Suse | xen | linux enterprise micro 5.5 | 4.17.6_14-150500.3.76.3 | fixed |
| Suse | xen | linux enterprise high performance computing 15 sp5-espos | 4.17.6_14-150500.3.76.3 | fixed |
| Suse | xen | linux enterprise high performance computing 15 sp5-ltss | 4.17.6_14-150500.3.76.3 | fixed |
| Suse | xen | linux enterprise server 15 sp5-ltss | 4.17.6_14-150500.3.76.3 | fixed |
| Suse | xen | linux enterprise server for sap applications 15 sp5 | 4.17.6_14-150500.3.76.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | xen | source | sid | 4.20.3+127-gc42374a105-1 | not yet assigned | Not reported | Not reported |
| Debian | xen | source | forky | 4.20.3+127-gc42374a105-1 | not yet assigned | Not reported | Not reported |
| Debian | xen | source | trixie | 4.20.3+127-gc42374a105-0+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | xen | source | bookworm | 4.17.7-0+deb12u1 | not yet assigned | Not reported | Not reported |
| Alpine | xen | apk | 3.21 | 4.19.6-r0 | Not reported | ALPINE-CVE-2026-42493 | Not reported |
| Alpine | xen | apk | 3.22 | 4.20.4-r0 | Not reported | ALPINE-CVE-2026-42493 | Not reported |
| Alpine | xen | apk | 3.23 | 4.20.4-r0 | Not reported | ALPINE-CVE-2026-42493 | Not reported |
| Alpine | xen | apk | 3.24 | 4.21.2-r0 | Not reported | ALPINE-CVE-2026-42493 | Not reported |
| Suse | xen | rpm | linux enterprise module for basesystem 15 sp7 | 4.20.4_04-150700.3.46.1 | Not reported | SUSE-SU-2026:4090-1 | Not reported |
| Suse | xen | rpm | linux enterprise module for server applications 15 sp7 | 4.20.4_04-150700.3.46.1 | Not reported | SUSE-SU-2026:4090-1 | Not reported |
| Suse | xen | rpm | linux enterprise micro 5.3 | 4.16.7_12-150400.4.89.3 | Not reported | SUSE-SU-2026:3462-1 | Not reported |
| Suse | xen | rpm | linux enterprise micro 5.4 | 4.16.7_12-150400.4.89.3 | Not reported | SUSE-SU-2026:3462-1 | Not reported |
| Suse | xen | rpm | linux enterprise high performance computing 15 sp4-espos | 4.16.7_12-150400.4.89.3 | Not reported | SUSE-SU-2026:3462-1 | Not reported |
| Suse | xen | rpm | linux enterprise high performance computing 15 sp4-ltss | 4.16.7_12-150400.4.89.3 | Not reported | SUSE-SU-2026:3462-1 | Not reported |
| Suse | xen | rpm | linux enterprise server 15 sp4-ltss | 4.16.7_12-150400.4.89.3 | Not reported | SUSE-SU-2026:3462-1 | Not reported |
| Suse | xen | rpm | linux enterprise server for sap applications 15 sp4 | 4.16.7_12-150400.4.89.3 | Not reported | SUSE-SU-2026:3462-1 | Not reported |
| Suse | xen | rpm | linux enterprise server 12 sp5-ltss | 4.12.4_72-3.148.4 | Not reported | SUSE-SU-2026:3451-1 | Not reported |
| Suse | xen | rpm | linux enterprise server ltss extended security 12 sp5 | 4.12.4_72-3.148.4 | Not reported | SUSE-SU-2026:3451-1 | Not reported |
| Suse | xen | rpm | linux enterprise server 15 sp6-ltss | 4.18.5_20-150600.3.53.3 | Not reported | SUSE-SU-2026:3409-1 | Not reported |
| Suse | xen | rpm | linux enterprise server for sap applications 15 sp6 | 4.18.5_20-150600.3.53.3 | Not reported | SUSE-SU-2026:3409-1 | Not reported |
| Suse | xen | rpm | linux enterprise micro 5.5 | 4.17.6_14-150500.3.76.3 | Not reported | SUSE-SU-2026:3423-1 | Not reported |
| Suse | xen | rpm | linux enterprise high performance computing 15 sp5-espos | 4.17.6_14-150500.3.76.3 | Not reported | SUSE-SU-2026:3423-1 | Not reported |
| Suse | xen | rpm | linux enterprise high performance computing 15 sp5-ltss | 4.17.6_14-150500.3.76.3 | Not reported | SUSE-SU-2026:3423-1 | Not reported |
| Suse | xen | rpm | linux enterprise server 15 sp5-ltss | 4.17.6_14-150500.3.76.3 | Not reported | SUSE-SU-2026:3423-1 | Not reported |
| Suse | xen | rpm | linux enterprise server for sap applications 15 sp5 | 4.17.6_14-150500.3.76.3 | Not reported | SUSE-SU-2026:3423-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libxencall1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxen-dev]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxendevicemodel1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxenevtchn1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxenforeignmemory1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxengnttab1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxenhypfs1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxenmisc4.17]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxenstore4]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxentoolcore1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [libxentoollog1]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-doc]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-hypervisor-4.17-amd64]Affected
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-hypervisor-4.17-amd64-dbg]Affected
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-hypervisor-4.17-arm64]Affected
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-hypervisor-4.17-arm64-dbg]Affected
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-hypervisor-common]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xenstore-utils]Affected
Source package: [xen]
Details (4)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-system-amd64]Affected
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· amd64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· amd64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
- [xen-system-arm64]Affected
Source package: [xen]
Details (2)
4.17.5+72-g01140da4e8-1· arm64 · bookwormAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
4.17.5+72-g01140da4e8-1· arm64 · bookworm-securityAffected · Fixed:
4.17.7-0+deb12u1nvd · xen · debian · bookworm; nvd · xen · debian · 12
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_3409-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42493]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-42493]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-42493]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3409-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3423-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3451-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3462-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:4090-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-42493]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42493.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2568.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]