Score 6.5 from GitHub Security Advisory published 2026-05-19. NVD baseline CVSS 6.5; sources differ by 0.0.
A fix is available — apply it.
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.
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
May 19, 2026
May 19, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | 4.14.2+25-gb6a8c4f72d-2 ... 4.20.3+127-gc42374a105-1 (46 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | 4.17.1+2-gb773c48e36-1 ... 4.17.5+72-g01140da4e8-1 (14 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | 4.20.0+68-g35cb38b222-1 ... 4.20.2+7-g1badcf5035-2 (6 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | 4.20.0+68-g35cb38b222-1, 4.20.2+37-g61ff35323e-1, 4.20.2+7-g1badcf5035-1, 4.20.2+7-g1badcf5035-2 |
| — |
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 97 of 233 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 136 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
Alpine:v3.20:xen
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-23557
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.