CVE catalog

CVE-2026-23557

Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES command within a transaction due to an assert() triggering. In case xenstored was built with NDEBUG #defined nothing bad will happ

[CVE catalog]

Severity: Medium · CVSS 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Published: Apr 28, 2026, 2:46:52 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.16% · Oct 25, 2026

Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES command within a transaction due to an assert() triggering. In case xenstored was built with NDEBUG #defined nothing bad will happen, as assert() is doing nothing in this case. Note that the default is not to define NDEBUG for xenstored builds even in release builds of Xen.

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
Cpe	xen	Not reported	Not reported	vulnerable
Cpe	xen	Not reported	Not reported	unknown
Cpe	xen	Not reported	Not reported	unknown
Alpine	xen	3.20	`4.18.5-r7`	fixed
Alpine	xen	3.21	`4.19.5-r2`	fixed
Alpine	xen	3.22	`4.20.3-r2`	fixed
Alpine	xen	3.23	`4.20.3-r2`	fixed
Alpine	xen	3.24	`4.21.1-r3`	fixed
Opensuse	xen	tumbleweed	`4.21.1_04-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	xen	source	sid	`4.20.3+127-gc42374a105-1`	unimportant	Not reported	Not reported
Debian	xen	source	forky	`4.20.3+127-gc42374a105-1`	unimportant	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	3.20	`4.18.5-r7`	Not reported	ALPINE-CVE-2026-23557	Not reported
Alpine	xen	apk	3.21	`4.19.5-r2`	Not reported	ALPINE-CVE-2026-23557	Not reported
Alpine	xen	apk	3.22	`4.20.3-r2`	Not reported	ALPINE-CVE-2026-23557	Not reported
Alpine	xen	apk	3.23	`4.20.3-r2`	Not reported	ALPINE-CVE-2026-23557	Not reported
Alpine	xen	apk	3.24	`4.21.1-r3`	Not reported	ALPINE-CVE-2026-23557	Not reported
Opensuse	xen	rpm	tumbleweed	`4.21.1_04-1.1`	Not reported	OPENSUSE-SU-2026:10660-1	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libxencall1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxen-dev]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxendevicemodel1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxenevtchn1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxenforeignmemory1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxengnttab1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxenhypfs1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxenmisc4.17]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxenstore4]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxentoolcore1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[libxentoollog1]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-doc]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-hypervisor-4.17-amd64]Affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-hypervisor-4.17-amd64-dbg]Affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-hypervisor-4.17-arm64]Affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-hypervisor-4.17-arm64-dbg]Affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-hypervisor-common]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xenstore-utils]Affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-system-amd64]Affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
[xen-system-arm64]Affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Affected · Fixed: 4.17.7-0+deb12u1
  nvd · xen · debian · bookworm

Next results

Observed: Oct 27, 2026, 7:55:04 AM UTC

References

[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]