CVE-2021-47086: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: phonet/pep: refuse to enable an unbound pipe This ioctl() implicitly assumed that the socket was already bound to a valid local socket name, i.e. Phonet object. If the socket was not bound, two separate problems would occur: 1) We'd send an pipe enablement request with an invalid source object. 2) Later socket calls could BUG on the socket unexpectedly being connected yet not bound to a valid object.

Affected products

• Linux Linux Kernel: before 4.4.297 (fixed in 4.4.297); from 4.5, before 4.9.295 (fixed in 4.9.295); from 4.10, before 4.14.260 (fixed in 4.14.260); from 4.15, before 4.19.223 (fixed in 4.19.223); from 4.20, before 5.4.169 (fixed in 5.4.169); from 5.5, before 5.10.89 (fixed in 5.10.89); …

Published 2024-03-04. Last modified 2026-06-17.