4.3

CVE-2025-27465: x86: Incorrect stubs exception handling for flags recovery

Analyzed
AliasesALPINE-CVE-2025-27465SUSE-SU-2025:02471-1UBUNTU-CVE-2025-27465
Published 16-07-2025Last modified 04-11-2025

Vulnerability summary

CVE-2025-27465 is a medium (CVSS 4.3) vulnerability in xen. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 53.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.70%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 5
DSA-6068-1MGASA-2025-0270SUSE-SU-2025:02315-1SUSE-SU-2025:02316-1SUSE-SU-2025:02319-1SUSE-SU-2025:02325-1

Timeline

  1. 16-07-2025
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. Some instructions may raise an exception, which is supposed to be handled gracefully. Certain replayed instructions have additional logic to set up and recover the changes to the arithmetic flags. For replayed instructions where the flags recovery logic is used, the metadata for exception handling was incorrect, preventing Xen from handling the the exception gracefully, treating it as fatal instead.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.70%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

Increase +0.09 pp

From 0.62% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse2 products
  • xen&distro=SUSE Linux Enterprise Server 12 SP5-LTSS< 4.12.4_62-3.130.1
  • xen&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5< 4.12.4_62-3.130.1
Alpine1 product
  • xen≥ 4.9.0, < 4.18.5-r1 | ≥ 4.9.0, < 4.19.2-r2 | ≥ 4.9.0, < 4.20.1-r0
Debian1 product
  • xen< 4.17.5+72-g01140da4e8-1 | < 4.20.2+7-g1badcf5035-0+deb13u1 | < 4.20.2+7-g1badcf5035-1
Opensuse1 product
  • xen&distro=openSUSE Tumbleweed< 4.20.1_02-1.1
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product
  • xen≥ 4.9.0 (No fix recorded)

6 vendors · 7 products

References

12 links
Show all 12 references