CVE-2021-20305 @ mufasa

"CVE-2021-20305"
"nettle-2.7.1-9.el7_9.tuxcare.els2"
"Am I vulnerable?"

Status

new

Priority

8.1

Match score

4.0

Risk

MemCorrupt Remote priv:user

CVSS

8.1 HIGH

Reason

cpe: nettle; pkgs: nettle; version: in-range: nettle-2.7.1-9.el7_9.tuxcare.els2; risk:memory_corruption

Created

2026-10-15T10:20:40Z

Updated

2026-10-20T10:18:49Z

Package interrogation (copy)

Run on the host — click to copy a command. RPM

Package	Commands
nettle-2.7.1-9.el7_9.tuxcare.els2

Inventory lookup

Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.

Suggestions: nettle

System	Matches	Ticket for CVE-2021-20305
morris	nettle 2.7.1	new open
mufasa	nettle 2.7.1	new open
Archive	libnettle6 3.4.1-1+deb10u1	none
Bullseye	libnettle8 3.7.3-1	none
Helios	libnettle8 3.7.3-1	none
Janus	libnettle6 3.4.1-1+deb10u1	none
Library	libnettle4 2.7.1-5+deb8u2; libnettle6 3.3-1+deb9u1	none
Matrix	libnettle6 3.4.1-1+deb10u1; libnettle8 3.8.1-2	none
Saiph	libnettle4 2.7.1-5+deb8u2; libnettle6 3.4.1-1+deb10u1	none
Silk	libnettle8 3.8.1-2	none

Same product CVEs in your queue

Other open tickets that look like the same product. Closed tickets are omitted unless they are already pegged to this CVE.

CVE	CVSS	KEV	Systems	Status	Matched	Already related
CVE-2021-3580	7.5		morris, mufasa	new	nettle	—

Related CVE (same fix)

Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.

Host OS / kernel

CloudLinux release 7.9 (Boris Yegorov) (7.9) · cloudlinux

Arch

x86_64

kernel_release

uname -r → 3.10.0-962.3.2.lve1.5.89.el7.x86_64

kernel_version

uname -v → #1 SMP Thu Jul 9 15:55:31 UTC 2026

For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.

Same CVE on other hosts

Open the ticket for this CVE on another system.

System	Status	Priority	Updated
morris	new	8.1	2026-10-20T10:18:49Z	Open

Description

A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

Update status

Add note only

References

NVD: CVE-2021-20305