Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-79607— Xenstore: Guests can crash xenstored during Live Update

Quick assessment

Affected
Xen Xen
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Xenstore 实时更新期间，具有指定监控深度的 Xenstore 监视（watch）的状态记录会丢失两个字节。这导致在新 Xenstore 中读取该状态时出现状态不一致，从而引发 Xenstore 崩溃或返回错误的 Xenstore 数据。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
Xen Xen consult Xen advisory XSA-514 unknown
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-79607

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Xenstore: Guests can crash xenstored during Live Update
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Xen Xen consult Xen advisory XSA-514 -

II. Public POCs for CVE-2026-79607

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-79607

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-79607 (1)

Same Patch Batch · Xen · 2026-10-13 · 8 CVEs total

CVE-2026-102699 Arm: multiple issues with GNTTABOP_cache_flush
CVE-2026-102700 gnttab: cache-flush handling may cause page reference leak
CVE-2026-102702 Arm: multiple issues with GNTTABOP_cache_flush
CVE-2026-79611 VMX: VMentry failure with branch tracing and blocked states
CVE-2026-79609 x86: XPTI may break on huge-memory systems
CVE-2026-79610 grant-table: double version change race
CVE-2026-79608 x86/AMD: ineffectual Zenbleed workaround

IV. Related Vulnerabilities

Same product: Xen
Same vendor: Xen

V. Comments for CVE-2026-79607

No comments yet

Leave a comment