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CVE-2026-98252

Linux: RDMA/core: fix refcount bug in iwpm_get_nlmsg_request()

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
7.0High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.12%Chance of exploitation activity in the next 30 days, higher than 1% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in52c13c63bb3662c108244e7447055e30bf40244eAlso 8a91609032d47e77bcb37bc8f6e88d89340d2709, 2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8 and 3 moreCVE List
Published6 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 52c13c63bb3662c108244e7447055e30bf40244eLinuxCVE List
  • 8a91609032d47e77bcb37bc8f6e88d89340d2709LinuxCVE List
  • 2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8LinuxCVE List
  • 88e429a4e9bac3d2138011c5ca06254331f2587fLinuxCVE List
  • 117871cdb8927542abd7b65ce5995bf0265a8c05LinuxCVE List
  • 33fb59da49c4c3f5c2ec9f9d4447a56857a02c02LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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().

Text from CVE List

Affected versions 18

  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before 52c13c63bb3662c108244e7447055e30bf40244eCVE List
  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before 8a91609032d47e77bcb37bc8f6e88d89340d2709CVE List
  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before ce8a379598bd4058081416abea4279fd05a95374CVE List
  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before 2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8CVE List
  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before 88e429a4e9bac3d2138011c5ca06254331f2587fCVE List
  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before e15eb536be4f646ce683d2867572b2200be877f7CVE List
  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before 117871cdb8927542abd7b65ce5995bf0265a8c05CVE List
  • Linuxaffected: 30dc5e63d6a5ad24894b5512d10b228d73645a44 before 33fb59da49c4c3f5c2ec9f9d4447a56857a02c02CVE List
  • Linuxaffected: 3.16CVE List
  • Linuxunaffected: all versions before 3.16CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.54 through 6.18.*CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 8