CVE-2026-43128

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-43128

Key Details

CVE	CVE-2026-43128
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
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
Classified as	CWE-415 (Double Free)

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/umem: Fix double dma_buf_unpin in failure path

In ib_umem_dmabuf_get_pinned_with_dma_device(), the call to

ib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf

is immediately unpinned but the umem_dmabuf->pinned flag is still

set. Then, when ib_umem_release() is called, it calls

ib_umem_dmabuf_revoke() which will call dma_buf_unpin() again.

Fix this by removing the immediate unpin upon failure and just let

the ib_umem_release/revoke path handle it. This also ensures the

proper unmap-unpin unwind ordering if the dmabuf_map_pages call

happened to fail due to dma_resv_wait_timeout (and therefore has

a non-NULL umem_dmabuf->sgt). (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-43128
CVE	https://www.cve.org/CVERecord?id=CVE-2026-43128

Source

Reference

NVD

CVE