7.8

CVE-2026-74646: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-74646DEBIAN-CVE-2026-74646
Published 22-08-2026Last modified 25-08-2026
Open JSON

Vulnerability summary

CVE-2026-74646 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.6% 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
0.18%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2026-0506USN-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: misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke When an invoke is interrupted by a signal, wait_for_completion_interruptible() returns -ERESTARTSYS and fastrpc_internal_invoke() moves every buffer from fl->mmaps onto cctx->invoke_interrupted_mmaps. This list_del()/list_add_tail() walk runs without holding fl->lock, the lock that serialises fl->mmaps in fastrpc_req_mmap() and fastrpc_req_munmap() everywhere else. Take fl->lock around the move, matching every other fl->mmaps accessor.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

+0.05 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.18%

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≥ 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc, < 3f265e405e5ef85030c3777262e18bb556bc8724 | ≥ 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc, < a902fe1f80f58a2335b6be1131866f827ec44d1a | ≥ 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc, < af6345159abcbaa550518f31990d2a9558c2d369 | ≥ 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc, < efd02f8d1a7449f15809bc18d3cd41aafea75d7e | ≥ 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc, < b85a0e91d7d6cd06a53c881a46f749cfcef416a2 | 6.2

3 vendors · 145 products

References

9 links