7.8

CVE-2026-74634: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-74634DEBIAN-CVE-2026-74634
Published 22-08-2026Last modified 25-08-2026
Open JSON

Vulnerability summary

CVE-2026-74634 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 1.9% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 2
MGASA-2026-0506OPENSUSE-SU-2026:22091-1USN-8886-1

Timeline

  1. 22-08-2026
    PublishedVulnerability first disclosed.
  2. 25-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Prevent subbuf order change when resizing is disabled Because ring_buffer_subbuf_order_set() frees buffer pages, we can't allow it when resizing is disabled. A non-consuming reader is at risk of use-after-free (rb_advance_iter()). Return -EBUSY on resize_disabled, matching ring_buffer_resize() behaviour.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu142 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.12.105-1 | < 7.1.9-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ f9b94daa542a8d2532f0930f01cd9aec2d19621b, < b45b91db41379ee5fb36c187d6d7c37b725cbe8e | ≥ f9b94daa542a8d2532f0930f01cd9aec2d19621b, < 62978cf6347972c04130e4e841ba404504d92b32 | ≥ f9b94daa542a8d2532f0930f01cd9aec2d19621b, < 7568e9e717e7540bd05bcc007f5d76fcaff3cdff | ≥ f9b94daa542a8d2532f0930f01cd9aec2d19621b, < bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 | 6.8

3 vendors · 145 products

References

8 links