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CVE-2021-46996

netfilter: nftables: Fix a memleak from userdata error path in new objects

MEDIUM
5.5
CVSS Score
Published: February 28, 2024 at 08:13 AM UTC
Updated: June 17, 2026 at 04:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.10 ≤ v < 5.10.385.10 ≤ v < 5.11.225.10 ≤ v < 5.12.55.10 ≤ v < 5.135.11 ≤ v < 5.11.225.12 ≤ v < 5.12.55.10b131c96496b369c7b14125e7c50e89ac7cec8051
Vendor states this is fixed in 2c784a500f5edd337258b0fdb2f31bc9abde1a23 (fixed)
Vendor states this is fixed in 59fa98bfa1f4013d658d990cac88c87b46ff410c (fixed)
Vendor states this is fixed in 85dfd816fabfc16e71786eda0a33a7046688b5b0 (fixed)
Vendor states this is fixed in dd3bebf515f336214a91994348a2b86b9a1d3d7f (fixed)
Vendor states this is fixed in 5.10 (unaffected)
Vendor states this is fixed in 5.10.38 (unaffected)
Vendor states this is fixed in 5.11.22 (unaffected)
Vendor states this is fixed in 5.12.5 (unaffected)
Vendor states this is fixed in 5.13 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/2c784a500f5edd337258b0fdb2f31bc9abde1a23
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/59fa98bfa1f4013d658d990cac88c87b46ff410c
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/85dfd816fabfc16e71786eda0a33a7046688b5b0
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/dd3bebf515f336214a91994348a2b86b9a1d3d7f

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-401

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