7.1

CVE-2021-47110: linux Incomplete Cleanup

CVSS: 7.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2021-47110DEBIAN-CVE-2021-47110
Published 15-03-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2021-47110 is a high (CVSS 7.1) Incomplete Cleanup vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.6% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.24%
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 7 · Related 7
SUSE-SU-2024:1454-1SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1SUSE-SU-2024:1643-1SUSE-SU-2024:1646-1SUSE-SU-2024:1870-1

Timeline

  1. 15-03-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Disable kvmclock on all CPUs on shutdown Currenly, we disable kvmclock from machine_shutdown() hook and this only happens for boot CPU. We need to disable it for all CPUs to guard against memory corruption e.g. on restore from hibernate. Note, writing '0' to kvmclock MSR doesn't clear memory location, it just prevents hypervisor from updating the location so for the short while after write and while CPU is still alive, the clock remains usable and correct so we don't need to switch to some other clocksource.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.24%

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

Affected systems

Ubuntu87 products
  • linuxAll versions (No fix recorded) | < 5.4.0-77.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1051.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1e977aa12dd4f80688b1f243762212e75c6d7fe8, < 9084fe1b3572664ad276f427dce575f580c9799a | ≥ 1e977aa12dd4f80688b1f243762212e75c6d7fe8, < 3b0becf8b1ecf642a9edaf4c9628ffc641e490d6 | ≥ 1e977aa12dd4f80688b1f243762212e75c6d7fe8, < 1df2dc09926f61319116c80ee85701df33577d70 | ≥ 1e977aa12dd4f80688b1f243762212e75c6d7fe8, < c02027b5742b5aa804ef08a4a9db433295533046 | 2.6.26
  • linux_kernel< 5.4.125 | ≥ 5.5, < 5.10.43 | ≥ 5.11, < 5.12.10 | 5.13:rc1
Debian1 product
  • linux< 5.10.46-1

3 vendors · 90 products

References

8 links