CVE-2021-47293
- Source
- https://cve.org/CVERecord?id=CVE-2021-47293
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47293.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47293
- Downstream
- Related
- Published
- 2024-05-21T15:15:17.243Z
- Modified
- 2026-03-15T22:42:47.829707Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_skbmod: Skip non-Ethernet packets
Currently tcfskbmodact() 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 macDoing the above silently corrupts all the packets. Do not perform skbmod actions for non-Ethernet packets.
- References
-
- https://git.kernel.org/stable/c/34f1e1f657fae2891b485a3b2b95fe4d2aef9f0d
- https://git.kernel.org/stable/c/727d6a8b7ef3d25080fad228b2c4a1d4da5999c6
- https://git.kernel.org/stable/c/a88414fb1117f2fe65fb88e45ba694e1d09d5024
- https://git.kernel.org/stable/c/e4fdca366806f6bab374d1a95e626a10a3854b0c
- https://git.kernel.org/stable/c/071729150be9e1d1b851b70efb6d91ee9269d57b
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47293.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "4.9"
},
{
"fixed": "4.19.199"
}
]
},
{
"events": [
{
"introduced": "4.20"
},
{
"fixed": "5.4.136"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.54"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.13.6"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.14-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.14-rc2"
}
]
}
]