01 Record

CVE-2020-25643

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

UnratedPUBLISHEDCNA: redhat

CNA base scoreUnratedNo CNA CVSS vector

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02 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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 3.29% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 88.4% of scored records. A rank, not a probability.
NVD base score: 7.2 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2020-10-06 00:00Z6 YR AGO

Last updated

2024-08-04 15:40Z2 YR AGO

Reserved

2020-09-16

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

79a103eda2665dd0f5c1118640d907093e492d16d30f1b5038a15a6e49413bdc

05 Affected products

VendorProductVersionsPlatforms

n/akernelLinux kernel versions before 5.9-rc7—

06 References

bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1879981
git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66d42ed8b25b64eb63111a2b8582c5afc8bf1105
lists.opensuse.orgopenSUSE-SU-2020:1655http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.htmlvendor-advisory
lists.opensuse.orgopenSUSE-SU-2020:1698http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlvendor-advisory
www.debian.orgDSA-4774https://www.debian.org/security/2020/dsa-4774vendor-advisory
lists.debian.org[debian-lts-announce] 20201028 [SECURITY] [DLA 2417-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2020/10/msg00028.htmlmailing-list
lists.debian.org[debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlmailing-list
lists.debian.org[debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression updatehttps://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlmailing-list
security.netapp.comhttps://security.netapp.com/advisory/ntap-20201103-0002/
www.starwindsoftware.comhttps://www.starwindsoftware.com/security/sw-20210325-0002/

07 Fixed in

AlmaLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-305.el8

CloudLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-305.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Debian 12

linux
Fixed in 5.8.14-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 5.8.14-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 5.8.14-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.