CVE-2026-93110

RDMA/core: Wait for RCU callbacks before unloading ib_core

Published Sep 17, 2026 CVSS n/a EPSS < 1% KEV · Not listed

Description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/core: Wait for RCU callbacks before unloading ib_core

put_gid_ndev() is queued with call_rcu() and implemented in ib_core.
Stopping the workqueues does not drain callbacks already queued, so RCU
could invoke it after the module code has been unloaded.

synchronize_rcu() does not wait for callbacks. Wait for them after all
producers have stopped.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 82dfd1df456227279b1c8c648983a530f2612098
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 1646e123e56c3ad679fbfb571e8eef6386efb729
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 8e4f1677c09d75d738099f42afcf65d8587b664a
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 7853af5f15738dc00aebaa1fc9f1f0df40f6f603
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 0d5817fa4819abdc445fa77b5be4f0d49334a864
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 9d998297fdaf47492f6679287f6552879d1a7e3a
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 48b72fa0d209a92fb51b834a6080171cfa207b2c
`943bd984b108b3bb778790c2da4ae8d186b547e6`	affected	< 7d75592114d1664623c8cf191a12b38052c04483

Linux

affected

Version	Status	Constraints
`5.2`	affected	—
`0`	unaffected	< 5.2
`5.10.270`	unaffected	≤ 5.10.*
`5.15.221`	unaffected	≤ 5.15.*
`6.1.188`	unaffected	≤ 6.1.*
`6.6.157`	unaffected	≤ 6.6.*
`6.12.110`	unaffected	≤ 6.12.*
`6.18.52`	unaffected	≤ 6.18.*
`7.2.6`	unaffected	≤ 7.2.*
`7.3`	unaffected	≤ *

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[943bd984b108b3bb778790c2da4ae8d186b547e6,82dfd1df456227279b1c8c648983a530f2612098)`	affected	code_commit	—
`[943bd984b108b3bb778790c2da4ae8d186b547e6,1646e123e56c3ad679fbfb571e8eef6386efb729)`	affected	code_commit	—
`[943bd984b108b3bb778790c2da4ae8d186b547e6,8e4f1677c09d75d738099f42afcf65d8587b664a)`	affected	code_commit	—
`[943bd984b108b3bb778790c2da4ae8d186b547e6,7853af5f15738dc00aebaa1fc9f1f0df40f6f603)`	affected	code_commit	—
`[943bd984b108b3bb778790c2da4ae8d186b547e6,0d5817fa4819abdc445fa77b5be4f0d49334a864)`	affected	code_commit	—
`[943bd984b108b3bb778790c2da4ae8d186b547e6,9d998297fdaf47492f6679287f6552879d1a7e3a)`	affected	code_commit	—
`[943bd984b108b3bb778790c2da4ae8d186b547e6,48b72fa0d209a92fb51b834a6080171cfa207b2c)`	affected	code_commit	—
`[7d75592114d1664623c8cf191a12b38052c04483)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`5.2`	affected	generic	—
`[0,5.2)`	unaffected	generic	—
`[5.10.270,5.11.0)`	unaffected	semver	—
`[5.15.221,5.16.0)`	unaffected	semver	—
`[6.1.188,6.2.0)`	unaffected	semver	—
`[6.6.157,6.7.0)`	unaffected	semver	—
`[6.12.110,6.13.0)`	unaffected	semver	—
`[6.18.52,6.19.0)`	unaffected	semver	—
`[7.2.6,7.3.0)`	unaffected	semver	—
`7.3-rc1`	unaffected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4817-1	linux-6.12 security update
Debian DLA	DLA-4841-1	linux security update
Debian DSA	DSA-6528-1	linux security update
Ubuntu USN	USN-8961-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9019-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9020-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9022-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9023-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9024-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9025-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9026-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-9039-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-9040-1	Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN	USN-9066-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-9091-1	Linux kernel (NVIDIA Tegra) vulnerabilities

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.177% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0d5817fa4819abdc445fa77b5be4f0d49334a864
https://git.kernel.org/stable/c/1646e123e56c3ad679fbfb571e8eef6386efb729
https://git.kernel.org/stable/c/48b72fa0d209a92fb51b834a6080171cfa207b2c
https://git.kernel.org/stable/c/7853af5f15738dc00aebaa1fc9f1f0df40f6f603
https://git.kernel.org/stable/c/7d75592114d1664623c8cf191a12b38052c04483
https://git.kernel.org/stable/c/82dfd1df456227279b1c8c648983a530f2612098
https://git.kernel.org/stable/c/8e4f1677c09d75d738099f42afcf65d8587b664a
https://git.kernel.org/stable/c/9d998297fdaf47492f6679287f6552879d1a7e3a

History

Sep 19, 2026 7:30 AM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-416

Sep 17, 2026 4:30 PM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Wait for RCU callbacks before unloading ib_core put_gid_ndev() is queued with call_rcu() and implemented in ib_core. Stopping the workqueues does not drain callbacks already queued, so RCU could invoke it after the module code has been unloaded. synchronize_rcu() does not wait for callbacks. Wait for them after all producers have stopped.
Title		RDMA/core: Wait for RCU callbacks before unloading ib_core
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/0d5817fa4819abdc445fa77b5be4f0d49334a864 https://git.kernel.org/stable/c/1646e123e56c3ad679fbfb571e8eef6386efb729 https://git.kernel.org/stable/c/48b72fa0d209a92fb51b834a6080171cfa207b2c https://git.kernel.org/stable/c/7853af5f15738dc00aebaa1fc9f1f0df40f6f603 https://git.kernel.org/stable/c/7d75592114d1664623c8cf191a12b38052c04483 https://git.kernel.org/stable/c/82dfd1df456227279b1c8c648983a530f2612098 https://git.kernel.org/stable/c/8e4f1677c09d75d738099f42afcf65d8587b664a https://git.kernel.org/stable/c/9d998297fdaf47492f6679287f6552879d1a7e3a