In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_skbmod: Skip non-Ethernet packets
Currently tcf_skbmod_act() assumes that packets use Ethernet as their L2
protocol, which is not always the case. As an example, for CAN devices:
$ ip link add dev vcan0 type vcan
$ ip link set up vcan0
$ tc qdisc add dev vcan0 root handle 1: htb
$ tc filter add dev vcan0 parent 1: protocol ip prio 10 \
matchall action skbmod swap mac
Doing the above silently corrupts all the packets. Do not perform skbmod
actions for non-Ethernet packets.
References
Configurations
Configuration 1 (hide)
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History
07 May 2025, 17:51
Type | Values Removed | Values Added |
---|---|---|
References | () https://git.kernel.org/stable/c/071729150be9e1d1b851b70efb6d91ee9269d57b - Patch | |
References | () https://git.kernel.org/stable/c/34f1e1f657fae2891b485a3b2b95fe4d2aef9f0d - Patch | |
References | () https://git.kernel.org/stable/c/727d6a8b7ef3d25080fad228b2c4a1d4da5999c6 - Patch | |
References | () https://git.kernel.org/stable/c/a88414fb1117f2fe65fb88e45ba694e1d09d5024 - Patch | |
References | () https://git.kernel.org/stable/c/e4fdca366806f6bab374d1a95e626a10a3854b0c - Patch | |
CWE | NVD-CWE-noinfo | |
CPE | cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:* |
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CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
First Time |
Linux linux Kernel
Linux |
21 Nov 2024, 06:35
Type | Values Removed | Values Added |
---|---|---|
Summary |
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|
References | () https://git.kernel.org/stable/c/071729150be9e1d1b851b70efb6d91ee9269d57b - | |
References | () https://git.kernel.org/stable/c/34f1e1f657fae2891b485a3b2b95fe4d2aef9f0d - | |
References | () https://git.kernel.org/stable/c/727d6a8b7ef3d25080fad228b2c4a1d4da5999c6 - | |
References | () https://git.kernel.org/stable/c/a88414fb1117f2fe65fb88e45ba694e1d09d5024 - | |
References | () https://git.kernel.org/stable/c/e4fdca366806f6bab374d1a95e626a10a3854b0c - |
21 May 2024, 15:15
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2024-05-21 15:15
Updated : 2025-05-07 17:51
NVD link : CVE-2021-47293
Mitre link : CVE-2021-47293
CVE.ORG link : CVE-2021-47293
JSON object : View
Products Affected
linux
- linux_kernel
CWE