8.8

CVE-2026-74515: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled

Received
AliasesUBUNTU-CVE-2026-74515DEBIAN-CVE-2026-74515
Published 15-08-2026Last modified 16-10-2026

Vulnerability summary

CVE-2026-74515 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · -0.05 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 14 · Related 12
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:24197-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled The MPCIFC instruction doesn't allow registering adapter interrupts without first unregistering. So reject any request to enable interrupt forwarding if its already enabled for the zPCI device. This also fixes overwriting and thus leaking resources when the ioctl is called multiple times for the same device.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Decrease -0.05 pp

From 0.18% on 06-10-2026

06-10-202605-11-2026

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

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 7.0.0-1016.17
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 642d2d1067f7c4d753ae0e3ba5bc98b43cfe3c70 | ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 78d9648e7e960546d5b72504a0b0358cd8bb1e9d | ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 6be1ff49ba81f96a6fa55915e6d920be43ac57cc | ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 6837f0ae85fd54cf64c8a0c7c530bba2fae0a207 | ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 591952b63a9f976da7d49f719f36ec826ee2a575 | ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 8fa01be5a6149404adb82c0979a78f6347edd3ef | 6.0

3 vendors · 160 products

References

13 links
Show all 13 references