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CVE-2021-47306

net: fddi: fix UAF in fza_probe

HIGH
7.8
CVSS Score
Published: May 21, 2024 at 02:35 PM UTC
Updated: June 17, 2026 at 04:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: net: fddi: fix UAF in fza_probe fp is netdev private data and it cannot be used after free_netdev() call. Using fp after free_netdev() can cause UAF bug. Fix it by moving free_netdev() after error message. TURBOchannel adapter")

Affected

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

Linux Kernel· Linux
95%
4.20 ≤ v < 5.10.534.20 ≤ v < 5.13.54.20 ≤ v < 5.144.20 ≤ v < 5.4.1355.11 ≤ v < 5.13.55.5 ≤ v < 5.10.535.14 rc161414f5ec9834df8aa4f55c90de16b71a3d6ca8d
Vendor states this is fixed in 04b06716838bfc26742dbed3ae1d3697fe5317ee (fixed)
Vendor states this is fixed in bdfbb51f7a437ae8ea91317a5c133ec13adf3c47 (fixed)
Vendor states this is fixed in deb7178eb940e2c5caca1b1db084a69b2e59b4c9 (fixed)
Vendor states this is fixed in f33605908a9b6063525e9f68e62d739948c5fccf (fixed)
Vendor states this is fixed in 4.20 (unaffected)
Vendor states this is fixed in 5.10.53 (unaffected)
Vendor states this is fixed in 5.13.5 (unaffected)
Vendor states this is fixed in 5.14 (unaffected)
Vendor states this is fixed in 5.4.135 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/04b06716838bfc26742dbed3ae1d3697fe5317ee
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bdfbb51f7a437ae8ea91317a5c133ec13adf3c47
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/deb7178eb940e2c5caca1b1db084a69b2e59b4c9
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f33605908a9b6063525e9f68e62d739948c5fccf

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-416

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