High severity7.8NVD Advisory· Published Mar 23, 2026· Updated Apr 10, 2026
CVE-2026-23554
CVE-2026-23554
Description
The Intel EPT paging code uses an optimization to defer flushing of any cached EPT state until the p2m lock is dropped, so that multiple modifications done under the same locked region only issue a single flush.
Freeing of paging structures however is not deferred until the flushing is done, and can result in freed pages transiently being present in cached state. Such stale entries can point to memory ranges not owned by the guest, thus allowing access to unintended memory regions.
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Affected products
13- osv-coords11 versionspkg:rpm/opensuse/xen&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/xen&distro=openSUSE%20Tumbleweedpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP7pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6
< 4.18.5_12-150600.3.40.1+ 10 more
- (no CPE)range: < 4.18.5_12-150600.3.40.1
- (no CPE)range: < 4.21.1_02-1.1
- (no CPE)range: < 4.17.6_06-150500.3.62.2
- (no CPE)range: < 4.17.6_06-150500.3.62.2
- (no CPE)range: < 4.17.6_06-150500.3.62.2
- (no CPE)range: < 4.20.2_08-150700.3.28.1
- (no CPE)range: < 4.20.2_08-150700.3.28.1
- (no CPE)range: < 4.17.6_06-150500.3.62.2
- (no CPE)range: < 4.18.5_12-150600.3.40.1
- (no CPE)range: < 4.17.6_06-150500.3.62.2
- (no CPE)range: < 4.18.5_12-150600.3.40.1
Patches
Vulnerability mechanics
References
3- www.openwall.com/lists/oss-security/2026/03/17/6nvdMailing ListPatchThird Party Advisory
- xenbits.xen.org/xsa/advisory-480.htmlnvdPatchVendor Advisory
- xenbits.xenproject.org/xsa/advisory-480.htmlnvdPatchVendor Advisory
News mentions
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