5.5

CVE-2020-0009: debian debian_linux Incorrect Default Permissions

Modified
AliasesUBUNTU-CVE-2020-0009DEBIAN-CVE-2020-0009
Published 08-01-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-0009 is a medium (CVSS 5.5) Incorrect Default Permissions vulnerability in debian debian_linux. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 52.3% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 5.5, 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
0.68%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1exploit-database

Advisory lineage

Upstream 0 · Downstream 1
DLA-2241-1

Timeline

  1. 08-01-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

In calc_vm_may_flags of ashmem.c, there is a possible arbitrary write to shared memory due to a permissions bypass. This could lead to local escalation of privilege by corrupting memory shared between processes, with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-142938932

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.68%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.68% 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
  • exploit-databasedosandroidVerified

    Android - ashmem Readonly Bypasses via remap_file_pages() and ASHMEM_UNPIN

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

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

Ubuntu36 products
  • linuxAll versions (No fix recorded) | < 4.4.0-178.208 | < 4.15.0-99.100
  • linux-aws< 4.4.0-1066.70 | < 4.4.0-1106.117 | < 4.15.0-1066.70
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3< 5.3.0-1017.18~18.04.1
  • linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
Debian2 products
Google1 product

3 vendors · 39 products

References

8 links