CVE-2025-40160: xen/events: Return -EEXIST for bound VIRQs

Deferred
AliasesUBUNTU-CVE-2025-40160DEBIAN-CVE-2025-40160
Published 12-11-2025Last modified 30-10-2026

Vulnerability summary

CVE-2025-40160 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 10% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.20%
0%100%
Low · +0.01 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 28 · Related 28
OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0315-1SUSE-SU-2026:0316-1SUSE-SU-2026:20207-1

Timeline

  1. 12-11-2025
    PublishedVulnerability first disclosed.
  2. 30-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: xen/events: Return -EEXIST for bound VIRQs Change find_virq() to return -EEXIST when a VIRQ is bound to a different CPU than the one passed in. With that, remove the BUG_ON() from bind_virq_to_irq() to propogate the error upwards. Some VIRQs are per-cpu, but others are per-domain or global. Those must be bound to CPU0 and can then migrate elsewhere. The lookup for per-domain and global will probably fail when migrated off CPU 0, especially when the current CPU is tracked. This now returns -EEXIST instead of BUG_ON(). A second call to bind a per-domain or global VIRQ is not expected, but make it non-fatal to avoid trying to look up the irq, since we don't know which per_cpu(virq_to_irq) it will be in.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.19% 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

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu154 products
  • linuxAll versions (No fix recorded) | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ 62cc5fc7b2e0218144e162afb8191db9b924b5e6, < 7e19b3643855d4b63442bd20e8bb811e1a75998e | ≥ 62cc5fc7b2e0218144e162afb8191db9b924b5e6, < 612ef6056855c0aacb9b25d1d853c435754483f7 | ≥ 62cc5fc7b2e0218144e162afb8191db9b924b5e6, < a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa | ≥ 62cc5fc7b2e0218144e162afb8191db9b924b5e6, < f81db055a793eca9d05f79658ff62adafb41d664 | ≥ 62cc5fc7b2e0218144e162afb8191db9b924b5e6, < 07ce121d93a5e5fb2440a24da3dbf408fcee978e | 3.2

3 vendors · 156 products

References

23 links
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