CVE-2026-79608
CVE-2026-79608 · x86/AMD: ineffectual Zenbleed workaround
This page contains facts from public vulnerability sources. Check the original advisory before updating.
The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later re-worked to better integrate with other manipulations of the same MSR. In this rework an inverted conditional was introduced, resulting in the workaround to not be applied when needed and vice versa. For more details, see: http://xenbits.xen.org/xsa/advisory-433.html
CVSS 9.8 · Critical · EPSS 0.4% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
xen
- Versions
- consult Xen advisory XSA-515: Unknown
No fix published
xen Debian:12
- Versions
- 4.17.1+2-gb773c48e36-1
- 4.17.2+55-g0b56bed864-1
- 4.17.2+76-ge1f9cb16e2-1
- 4.17.2+76-ge1f9cb16e2-1~deb12u1
- 4.17.2-1
- 4.17.3+10-g091466ba55-1
- 4.17.3+10-g091466ba55-1.1
- 4.17.3+10-g091466ba55-1.1~exp1
- 4.17.3+10-g091466ba55-1.1~exp2
- 4.17.3+10-g091466ba55-1~deb12u1
- 4.17.3+36-g54dacb5c02-1
- 4.17.5+23-ga4e5191dc0-1
- 4.17.5+23-ga4e5191dc0-1+deb12u1
- 4.17.5+72-g01140da4e8-1
- 4.17.7-0+deb12u1
- 4.19.0+14-g0918434e0f-1~exp1
- 4.19.1-1
- 4.19.1-1~exp1
- 4.19.1-1~exp4
- 4.20.0+68-g35cb38b222-1
- 4.20.0-1
- 4.20.0~rc2+1-gfcde5e0de8-1~exp1
- 4.20.2+37-g61ff35323e-1
- 4.20.2+7-g1badcf5035-1
- 4.20.2+7-g1badcf5035-2
- 4.20.3+127-gc42374a105-1
- 4.20.4+39-gf1e1321c87-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Debian:13
- Versions
- 4.20.0+68-g35cb38b222-1
- 4.20.2+37-g61ff35323e-0+deb13u1
- 4.20.2+37-g61ff35323e-1
- 4.20.2+7-g1badcf5035-0+deb13u1
- 4.20.2+7-g1badcf5035-1
- 4.20.2+7-g1badcf5035-2
- 4.20.3+127-gc42374a105-0+deb13u1
- 4.20.3+127-gc42374a105-1
- Affected ranges
- ECOSYSTEM: < 4.20.4+39-gf1e1321c87-0+deb13u1
Update to 4.20.4+39-gf1e1321c87-0+deb13u1
xen Debian:14
- Versions
- 4.20.0+68-g35cb38b222-1
- 4.20.2+37-g61ff35323e-1
- 4.20.2+7-g1badcf5035-1
- 4.20.2+7-g1badcf5035-2
- 4.20.3+127-gc42374a105-1
- Affected ranges
- ECOSYSTEM: < 4.20.4+39-gf1e1321c87-1
Update to 4.20.4+39-gf1e1321c87-1
xen Ubuntu:16.04:LTS
- Versions
- 4.5.1-0ubuntu1
- 4.5.1-0ubuntu2
- 4.6.0-1ubuntu1
- 4.6.0-1ubuntu2
- 4.6.0-1ubuntu4
- 4.6.0-1ubuntu4.1
- 4.6.0-1ubuntu4.2
- 4.6.0-1ubuntu4.3
- 4.6.5-0ubuntu1
- 4.6.5-0ubuntu1.1
- 4.6.5-0ubuntu1.2
- 4.6.5-0ubuntu1.4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:18.04:LTS
- Versions
- 4.9.0-0ubuntu3
- 4.9.0-0ubuntu4
- 4.9.2-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:20.04:LTS
- Versions
- 4.9.2-0ubuntu2
- 4.9.2-0ubuntu6
- 4.9.2-0ubuntu7
- 4.11.3+24-g14b62ab3e5-1ubuntu1
- 4.11.3+24-g14b62ab3e5-1ubuntu2
- 4.11.3+24-g14b62ab3e5-1ubuntu2.2
- 4.11.3+24-g14b62ab3e5-1ubuntu2.3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:22.04:LTS
- Versions
- 4.11.4+24-gddaaccbbab-1ubuntu2
- 4.16.0-1~ubuntu2
- 4.16.0-1~ubuntu2.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:24.04:LTS
- Versions
- 4.17.2-1
- 4.17.2+55-g0b56bed864-1
- 4.17.2+76-ge1f9cb16e2-1
- 4.17.2+76-ge1f9cb16e2-1ubuntu1
- 4.17.3+10-g091466ba55-1
- 4.17.3+10-g091466ba55-1.1ubuntu2
- 4.17.3+10-g091466ba55-1.1ubuntu3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:26.10
- Versions
- 4.20.2+7-g1badcf5035-2build2
- 4.20.2+37-g61ff35323e-1ubuntu1
- 4.20.3+127-gc42374a105-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:26.04:LTS
- Versions
- 4.20.0+68-g35cb38b222-1
- 4.20.2+7-g1badcf5035-2
- 4.20.2+7-g1badcf5035-2build2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published