5.5

CVE-2021-46996: netfilter: nftables: Fix a memleak from userdata error path in new objects

Analyzed
AliasesUBUNTU-CVE-2021-46996DEBIAN-CVE-2021-46996
Published 28-02-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-46996 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.9% of scored vulnerabilities.

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
0.25%
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

Timeline

  1. 28-02-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: Fix a memleak from userdata error path in new objects Release object name if userdata allocation fails.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu62 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ b131c96496b369c7b14125e7c50e89ac7cec8051, < 2c784a500f5edd337258b0fdb2f31bc9abde1a23 | ≥ b131c96496b369c7b14125e7c50e89ac7cec8051, < 59fa98bfa1f4013d658d990cac88c87b46ff410c | ≥ b131c96496b369c7b14125e7c50e89ac7cec8051, < dd3bebf515f336214a91994348a2b86b9a1d3d7f | ≥ b131c96496b369c7b14125e7c50e89ac7cec8051, < 85dfd816fabfc16e71786eda0a33a7046688b5b0 | 5.10
  • linux_kernel≥ 5.10, < 5.10.38 | ≥ 5.11, < 5.11.22 | ≥ 5.12, < 5.12.5
Debian1 product
  • linux< 5.10.38-1

3 vendors · 65 products

References

8 links