CVE-2026-43128

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43128
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).

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96be Patch
https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319 Patch
https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18df Patch
https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bd Patch
https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4 Patch
https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
History

08 May 2026, 17:52

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96be - () https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96be - Patch
References () https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319 - () https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319 - Patch
References () https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18df - () https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18df - Patch
References () https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bd - () https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bd - Patch
References () https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4 - () https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4 - Patch
References () https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf - () https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf - Patch
CWE CWE-415
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*

08 May 2026, 13:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

06 May 2026, 12:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-06 12:16

Updated : 2026-05-08 17:52

NVD link : CVE-2026-43128

Mitre link : CVE-2026-43128

CVE.ORG link : CVE-2026-43128

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-415

Double Free