7.5

CVE-2020-25643: debian debian_linux Improper Input Validation

Modified
AliasesUBUNTU-CVE-2020-25643DEBIAN-CVE-2020-25643
Published 06-10-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-25643 is a high (CVSS 7.5) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 3.29% chance of exploitation in the next 30 days, higher than 88.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.2, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v2.0 (NVD)
EPSS score
3.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 30 · Related 22
DLA-2417-1DLA-2420-1DSA-4774-1MGASA-2020-0392OPENSUSE-SU-2020:1655-1OPENSUSE-SU-2020:1698-1

Timeline

  1. 06-10-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

3.29%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

No change 0.00 pp

From 3.29% 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

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu43 products
  • linuxAll versions (No fix recorded) | < 4.4.0-197.229 | < 4.15.0-126.129 | < 5.4.0-56.62
  • linux-aws< 4.4.0-1082.86 | < 4.4.0-1118.132 | < 4.15.0-1088.93 | < 5.4.0-1030.31
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3All versions (No fix recorded)
  • linux-aws-5.4< 5.4.0-1030.31~18.04.1
Debian2 products
Linux1 product
  • linux_kernel≥ 2.6.29, < 4.4.238 | ≥ 4.5, < 4.9.238 | ≥ 4.10, < 4.14.200 | ≥ 4.15, < 4.19.148 | ≥ 4.20, < 5.4.68 | ≥ 5.5, < 5.8.12 | 5.9.0:rc1 | 5.9.0:rc2 | 5.9.0:rc3 | 5.9.0:rc4 | 5.9.0:rc5 | 5.9.0:rc6
Netapp1 product
Opensuse1 product
Redhat1 product
Starwindsoftware1 product
  • starwind_virtual_sanv8:build12533 | v8:build12658 | v8:build12859 | v8:build13170 | v8:build13586 | v8:build13861

7 vendors · 50 products

References

19 links
Show all 19 references