CVE catalog

CVE-2026-79607

xen: CVE-2026-79607

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Oct 13, 2026, 4:17:22 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.12% · Oct 25, 2026

During Xenstore live update the state record for a Xenstore watch with specified watch depth is written with two bytes missing. This results in an inconsistent state when reading the state back in the new Xenstore, causing a crash of Xenstore or wrong Xenstore data.

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`	not affected
Debian	xen	forky	`4.20.4+39-gf1e1321c87-1`	not affected
Debian	xen	trixie	`4.20.3+127-gc42374a105-0+deb13u1`	not affected
Debian	xen	trixie-security	`4.20.4+39-gf1e1321c87-0+deb13u1`	not affected
Debian	xen	bookworm	`4.17.5+72-g01140da4e8-1`	not affected
Debian	xen	bookworm-security	`4.17.7-0+deb12u1`	not affected
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`	vulnerable
Ubuntu	xen	22.04	`4.11.4+24-gddaaccbbab-1ubuntu2`	vulnerable
Ubuntu	xen	22.04	`4.16.0-1~ubuntu2`	vulnerable
Ubuntu	xen	22.04	`4.16.0-1~ubuntu2.1`	vulnerable
Ubuntu	xen	24.04	`4.17.2-1`	vulnerable
Ubuntu	xen	24.04	`4.17.2+55-g0b56bed864-1`	vulnerable
Ubuntu	xen	24.04	`4.17.2+76-ge1f9cb16e2-1`	vulnerable
Ubuntu	xen	24.04	`4.17.2+76-ge1f9cb16e2-1ubuntu1`	vulnerable
Ubuntu	xen	24.04	`4.17.3+10-g091466ba55-1`	vulnerable
Ubuntu	xen	24.04	`4.17.3+10-g091466ba55-1.1ubuntu2`	vulnerable
Ubuntu	xen	24.04	`4.17.3+10-g091466ba55-1.1ubuntu3`	vulnerable
Ubuntu	xen	26.10	`4.20.2+7-g1badcf5035-2build2`	vulnerable
Ubuntu	xen	26.10	`4.20.2+37-g61ff35323e-1ubuntu1`	vulnerable
Ubuntu	xen	26.10	`4.20.3+127-gc42374a105-1`	vulnerable
Ubuntu	xen	26.04	`4.20.0+68-g35cb38b222-1`	vulnerable
Ubuntu	xen	26.04	`4.20.2+7-g1badcf5035-2`	vulnerable
Ubuntu	xen	26.04	`4.20.2+7-g1badcf5035-2build2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	xen	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	xen	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	xen	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	xen	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libxencall1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxen-dev]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxendevicemodel1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxenevtchn1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxenforeignmemory1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxengnttab1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxenhypfs1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxenmisc4.17]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxenstore4]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxentoolcore1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[libxentoollog1]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-doc]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-hypervisor-4.17-amd64]Not affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-hypervisor-4.17-amd64-dbg]Not affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-hypervisor-4.17-arm64]Not affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-hypervisor-4.17-arm64-dbg]Not affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-hypervisor-common]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xenstore-utils]Not affected
Source package: [xen]
Details (4)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-system-amd64]Not affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · amd64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm
[xen-system-arm64]Not affected
Source package: [xen]
Details (2)
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm
  Not affected
  dsa · xen · debian · bookworm
- 4.17.5+72-g01140da4e8-1 · arm64 · bookworm-security
  Not affected
  dsa · xen · debian · bookworm

Next results

Observed: Oct 27, 2026, 4:44:11 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]