DEBIAN-CVE-2021-47439
Record from OSV · Published May 22, 2024
In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the ksz module is installed and removed using rmmod, kernel crashes with null pointer dereferrence error. During rmmod, ksz_switch_remove function tries to cancel the mib_read_workqueue using cancel_delayed_work_sync routine and unregister switch from dsa. During dsa_unregister_switch it calls ksz_mac_link_down, which in turn reschedules the workqueue since mib_interval is non-zero. Due to which queue executed after mib_interval and it tries to access dp->slave. But the slave is unregistered in the ksz_switch_remove function. Hence kernel crashes. To avoid this crash, before canceling the workqueue, resetted the mib_interval to 0. v1 -> v2: -Removed the if condition in ksz_mib_read_work
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:12 | 5.14.16-1 |
| linux | Debian:13 | 5.14.16-1 |
| linux | Debian:14 | 5.14.16-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | linux | 0 |
| Debian:13 | linux | 0 |
| Debian:14 | linux | 0 |
Timeline
- May 22, 2024 CVE Published
- Oct 23, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln DEBIAN-CVE-2021-47439
vulnetix vdb fixes DEBIAN-CVE-2021-47439Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/DEBIAN-CVE-2021-47439/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart