Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: fix refcount bug in iwpm_get_nlmsg_request() iwpm_get_nlmsg_request() initializes refcount _after_ list_add_tail() making it accessible to global list where another CPU can kref_get() on nlmsg_request causing a refcount "addition on 0" bug. Fix this by initializing kref _before_ list_add_tail() so refcount for nlmsg_request can be incremented/decremented normally. In addition, also initialize every field before list_add_tail().

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/117871cdb8927542abd7b65ce5995bf0265a8c05
• git.kernel.org/stable/c/2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8
• git.kernel.org/stable/c/33fb59da49c4c3f5c2ec9f9d4447a56857a02c02
• git.kernel.org/stable/c/52c13c63bb3662c108244e7447055e30bf40244e
• git.kernel.org/stable/c/88e429a4e9bac3d2138011c5ca06254331f2587f
• git.kernel.org/stable/c/8a91609032d47e77bcb37bc8f6e88d89340d2709
• git.kernel.org/stable/c/ce8a379598bd4058081416abea4279fd05a95374
• git.kernel.org/stable/c/e15eb536be4f646ce683d2867572b2200be877f7