5.5

CVE-2020-28588: linux linux_kernel

Modified
AliasesUBUNTU-CVE-2020-28588DEBIAN-CVE-2020-28588
Published 10-05-2021Last modified 04-08-2024

Vulnerability summary

CVE-2020-28588 is a medium (CVSS 5.5) vulnerability in linux linux_kernel. EPSS estimates a 1.10% chance of exploitation in the next 30 days, higher than 65.7% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 4, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.10%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
MGASA-2021-0030MGASA-2021-0031USN-4750-1USN-4751-1USN-4752-1

Timeline

  1. 10-05-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.

CVSS metrics

7 scores · 4 sources · 3 versions

EPSS trend

Probability

1.10%

Chance of exploitation in the next 30 days

Percentile

66%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.10% on 04-10-2026

04-10-202603-11-2026

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

1 found
  • referenceUnverified

    Exploit Reference (talosintelligence.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu39 products
  • linux< 5.4.0-66.74
  • linux-aws< 5.4.0-1038.40
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3All versions (No fix recorded)
  • linux-aws-5.4< 5.4.0-1038.40~18.04.1
Debian1 product
  • linux< 5.9.15-1
Linux1 product

3 vendors · 41 products

References

8 links