CVE-2026-43120

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43120
In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix double free related to rereg_user_mr If IB_MR_REREG_TRANS is set during rereg_user_mr, the umem will be released and a new one will be allocated in irdma_rereg_mr_trans. If any step of irdma_rereg_mr_trans fails after the new umem is allocated, it releases the umem, but does not set iwmr->region to NULL. The problem is that this failure is propagated to the user, who will then call ibv_dereg_mr (as they should). Then, the dereg_mr path will see a non-NULL umem and attempt to call ib_umem_release again. Fix this by setting iwmr->region to NULL after ib_umem_release. Fixed: 5ac388db27c4 ("RDMA/irdma: Add support to re-register a memory region")

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/0c5d70bcb9d2275a1c8515a924016fcfeb4ab441 Patch
https://git.kernel.org/stable/c/0f22c32141acdcda266b26cab2b830baf870f3e0 Patch
https://git.kernel.org/stable/c/29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2 Patch
https://git.kernel.org/stable/c/62298a48f8b8788ad8b8464e6ffdf1ddebd2217e Patch
https://git.kernel.org/stable/c/66964118f1f50ed85001c8fc9f7ab5bbdd021ee0 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:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
History

12 May 2026, 21:37

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
CWE CWE-415
References () https://git.kernel.org/stable/c/0c5d70bcb9d2275a1c8515a924016fcfeb4ab441 - () https://git.kernel.org/stable/c/0c5d70bcb9d2275a1c8515a924016fcfeb4ab441 - Patch
References () https://git.kernel.org/stable/c/0f22c32141acdcda266b26cab2b830baf870f3e0 - () https://git.kernel.org/stable/c/0f22c32141acdcda266b26cab2b830baf870f3e0 - Patch
References () https://git.kernel.org/stable/c/29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2 - () https://git.kernel.org/stable/c/29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2 - Patch
References () https://git.kernel.org/stable/c/62298a48f8b8788ad8b8464e6ffdf1ddebd2217e - () https://git.kernel.org/stable/c/62298a48f8b8788ad8b8464e6ffdf1ddebd2217e - Patch
References () https://git.kernel.org/stable/c/66964118f1f50ed85001c8fc9f7ab5bbdd021ee0 - () https://git.kernel.org/stable/c/66964118f1f50ed85001c8fc9f7ab5bbdd021ee0 - Patch

08 May 2026, 13:16

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

06 May 2026, 10:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-06 10:16

Updated : 2026-05-12 21:37

NVD link : CVE-2026-43120

Mitre link : CVE-2026-43120

CVE.ORG link : CVE-2026-43120

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-415

Double Free