CVE-2026-90423

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90423

Key Details

CVE	CVE-2026-90423
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

RDMA/rxe: Fix UAF in ODP init error-handling path

rxe_odp_mr_init_user() stores &umem_odp->umem in mr->umem before

calling rxe_odp_init_pages(). If rxe_odp_init_pages() fails,

rxe_odp_mr_init_user() releases umem_odp and returns an error.

rxe_reg_user_mr() then unwinds the error through rxe_cleanup(),

rxe_mr_cleanup(), ib_umem_release(mr->umem). There is an

IS_ERR_OR_NULL(umem) check at the start of ib_umem_release().

But since mr->umem is NOT reset to NULL in the error handling

path of rxe_odp_mr_init_user(), the check passes and it reads

already-freed fields like umem->is_dmabuf, causing UAF.

Fix the UAF by clearing mr->umem after releasing the failed

ODP umem so the MR cleanup path does not release it again. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90423
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90423

Source

Reference

NVD

CVE