CVE-2021-47293
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net/sched: act_skbmod: Skip non-Ethernet packets
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 86da71b57383d40993cb90baafb3735cffe5d800 | affected | git | e4fdca366806f6bab374d1a95e626a10a3854b0c | Unavailable | None listed |
| 86da71b57383d40993cb90baafb3735cffe5d800 | affected | git | a88414fb1117f2fe65fb88e45ba694e1d09d5024 | Unavailable | None listed |
| 86da71b57383d40993cb90baafb3735cffe5d800 | affected | git | 071729150be9e1d1b851b70efb6d91ee9269d57b | Unavailable | None listed |
| 86da71b57383d40993cb90baafb3735cffe5d800 | affected | git | 34f1e1f657fae2891b485a3b2b95fe4d2aef9f0d | Unavailable | None listed |
| 86da71b57383d40993cb90baafb3735cffe5d800 | affected | git | 727d6a8b7ef3d25080fad228b2c4a1d4da5999c6 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.9 | Unavailable | None listed |
| 4.19.199 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.136 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.54 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.13.6 | unaffected | semver | Unavailable | 5.13.* | None listed |
| 5.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |