CVE-2021-47560
published 2024-05-24CVE-2021-47560: In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
12.8th percentile
In the Linux kernel, the following vulnerability has been resolved:
mlxsw: spectrum: Protect driver from buggy firmware
When processing port up/down events generated by the device's firmware,
the driver protects itself from events reported for non-existent local
ports, but not the CPU port (local port 0), which exists, but lacks a
netdev.
This can result in a NULL pointer dereference when calling
netif_carrier_{on,off}().
Fix this by bailing early when processing an event reported for the CPU
port. Problem was only observed when running on top of a buggy emulator.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.15.15-1 (bookworm) | linux 5.15.15-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 28b1987ef5064dd5c43538ba1168ef7b801f3cad < 90d0736876c50ecde1a3275636a06b9ddb1cace9 | 90d0736876c50ecde1a3275636a06b9ddb1cace9 |
| linux | linux | >= 28b1987ef5064dd5c43538ba1168ef7b801f3cad < da4d70199e5d82da664a80077508d6c18f5e76df | da4d70199e5d82da664a80077508d6c18f5e76df |
| linux | linux | >= 28b1987ef5064dd5c43538ba1168ef7b801f3cad < 63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047 | 63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.84-1 | 5.10.84-1 |
| linux | linux_kernel | >= 0 < 5.15.15-1 | 5.15.15-1 |
| linux | linux_kernel | >= 0 < 5.15.15-1 | 5.15.15-1 |
| linux | linux_kernel | >= 0 < 5.15.15-1 | 5.15.15-1 |
| linux | linux_kernel | >= 5.11 < 5.15.6 | 5.15.6 |
| linux | linux_kernel | >= 5.4 < 5.10.83 | 5.10.83 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: mlxsw: spectrum: Protect driver from buggy firmware
vendor_redhat·2024-05-24·CVSS 5.5
CVE-2021-47560 [MEDIUM] CWE-476 kernel: mlxsw: spectrum: Protect driver from buggy firmware
kernel: mlxsw: spectrum: Protect driver from buggy firmware
In the Linux kernel, the following vulnerability has been resolved:
mlxsw: spectrum: Protect driver from buggy firmware
When processing port up/down events generated by the device's firmware,
the driver protects itself from events reported for non-existent local
ports, but not the CPU port (local port 0), which exists, but lacks a
netdev.
This can result in a NULL pointer dereference when calling
netif_carrier_{on,off}().
Fix this by bailing early when processing an event reported for the CPU
port. Problem was only observed when running on top of a buggy emulator.
A vulnerability was found in the Linux kernel's mlxsw spectrum driver, where processing port up/down events leads to a NULL pointer dereference. This issue occurs when
Debian
CVE-2021-47560: linux - In the Linux kernel, the following vulnerability has been resolved: mlxsw: spec...
vendor_debian·2021·CVSS 5.5
CVE-2021-47560 [MEDIUM] CVE-2021-47560: linux - In the Linux kernel, the following vulnerability has been resolved: mlxsw: spec...
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not the CPU port (local port 0), which exists, but lacks a netdev. This can result in a NULL pointer dereference when calling netif_carrier_{on,off}(). Fix this by bailing early when processing an event reported for the CPU port. Problem was only observed when running on top of a buggy emulator.
Scope: local
bookworm: resolved (fixed in 5.15.15-1)
bullseye: resolved (fixed in 5.10.84-1)
forky: resolved (fixed in 5.15.15-1)
sid: resolved (fixed in 5.15.15-1)
trixie: resolved (fixed in 5.15.15-1)
OSV
CVE-2021-47560: In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down e
osv·2024-05-24·CVSS 5.5
CVE-2021-47560 [MEDIUM] CVE-2021-47560: In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down e
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not the CPU port (local port 0), which exists, but lacks a netdev. This can result in a NULL pointer dereference when calling netif_carrier_{on,off}(). Fix this by bailing early when processing an event reported for the CPU port. Problem was only observed when running on top of a buggy emulator.
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9https://git.kernel.org/stable/c/da4d70199e5d82da664a80077508d6c18f5e76dfhttps://git.kernel.org/stable/c/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9https://git.kernel.org/stable/c/da4d70199e5d82da664a80077508d6c18f5e76df
2024-05-24
Published