7.8

CVE-2021-42252: linux linux_kernel

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2021-42252DEBIAN-CVE-2021-42252
Published 11-10-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-42252 is a high (CVSS 7.8) vulnerability in linux linux_kernel. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.6% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.37%
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 20 · Related 19
DLA-2785-1OPENSUSE-SU-2021:1477-1OPENSUSE-SU-2021:3641-1OPENSUSE-SU-2021:3675-1OPENSUSE-SU-2021:3876-1SUSE-SU-2021:3640-1

Timeline

  1. 11-10-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in aspeed_lpc_ctrl_mmap in drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6. Local attackers able to access the Aspeed LPC control interface could overwrite memory in the kernel and potentially execute privileges, aka CID-b49a0e69a7b1. This occurs because a certain comparison uses values that are not memory sizes.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

0.00 pp

From 0.37% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.37%

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

Ubuntu18 products
  • linux< 4.15.0-162.170 | < 5.4.0-90.101
  • linux-aws-fips< 4.15.0-2056.58 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
  • linux-azureAll versions (No fix recorded)
  • linux-azure-fips< 4.15.0-2038.42 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
  • linux-fips< 4.15.0-1072.81 | All versions (No fix recorded) | < 5.4.0-1036.42
Netapp10 products
Debian1 product
  • linux< 5.14.6-1
Linux1 product
  • linux_kernel≥ 4.12, < 4.14.247 | ≥ 4.15, < 4.19.207 | ≥ 4.20, < 5.4.148 | ≥ 5.5, < 5.10.67 | ≥ 5.11, < 5.13.19 | ≥ 5.14, < 5.14.6

4 vendors · 30 products

References

12 links
Show all 12 references