CVE-2026-90423

CVE CVE-2026-90423EUVD EUVD-2026-82084Published 2026-09-17T16:09:46.000ZLast changed 2026-09-18T17:55:18.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.15; d03fb5c6599e31b90c6b5f65d43d6ccc6b49eb91 <51f2c8d2c99fc1f452f7113c08a35edcc4bf8732; d03fb5c6599e31b90c6b5f65d43d6ccc6b49eb91 <4cfb448705da3171d44d9cbe7be53ff03284d532; patch: 7.3-rc1; patch: 6.18.52; d03fb5c6599e31b90c6b5f65d43d6ccc6b49eb91 <5f1933163327c9f1c8f2a341c6cb551aaf231ff9; patch: 7.2.6; patch: 0

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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