CVE-2021-47164

net/mlx5e: Fix null deref accessing lag dev

MEDIUM
5.5
CVSS Score
Published: March 25, 2024 at 09:16 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: net/mlx5e: Fix null deref accessing lag dev It could be the lag dev is null so stop processing the event. In bond_enslave() the active/backup slave being set before setting the upper dev so first event is without an upper dev. After setting the upper dev with bond_master_upper_dev_link() there is a second event and in that event we have an upper dev.

Affected

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

5.11 ≤ v < 5.12.95.8 ≤ v < 5.10.425.8 ≤ v < 5.12.95.8 ≤ v < 5.135.87e51891a237f9ea319f53f9beb83afb0077d88e6
Vendor states this is fixed in 2e4b0b95a489259f9d35a3db17023061f8f3d587 (fixed)
Vendor states this is fixed in 83026d83186bc48bb41ee4872f339b83f31dfc55 (fixed)
Vendor states this is fixed in bdfd3593a8248eea6ecfcbf7b47b56b86515672d (fixed)
Vendor states this is fixed in 5.10.42 (unaffected)
Vendor states this is fixed in 5.12.9 (unaffected)
Vendor states this is fixed in 5.13 (unaffected)
Vendor states this is fixed in 5.8 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/2e4b0b95a489259f9d35a3db17023061f8f3d587
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/83026d83186bc48bb41ee4872f339b83f31dfc55
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bdfd3593a8248eea6ecfcbf7b47b56b86515672d

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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