CVE-2026-43091

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43091
In the Linux kernel, the following vulnerability has been resolved: xfrm: Wait for RCU readers during policy netns exit xfrm_policy_fini() frees the policy_bydst hash tables after flushing the policy work items and deleting all policies, but it does not wait for concurrent RCU readers to leave their read-side critical sections first. The policy_bydst tables are published via rcu_assign_pointer() and are looked up through rcu_dereference_check(), so netns teardown must also wait for an RCU grace period before freeing the table memory. Fix this by adding synchronize_rcu() before freeing the policy hash tables.

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/069daad4f2ae9c5c108131995529d5f02392c446 Patch
https://git.kernel.org/stable/c/33a3149dd81a1e2f52b80ee1e0fc380b39f3d028 Patch
https://git.kernel.org/stable/c/3733fce2871c9bca9dd18a1a23b1432ea215a094 Patch
https://git.kernel.org/stable/c/438b1f668ad58f46ce699bb48e4698a7839e3f9e Patch
https://git.kernel.org/stable/c/b66920a3348c0f63ba18365248fa21fbf0b3a937 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:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
History

19 May 2026, 20:42

Type Values Removed Values Added
CWE NVD-CWE-noinfo
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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
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:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/069daad4f2ae9c5c108131995529d5f02392c446 - () https://git.kernel.org/stable/c/069daad4f2ae9c5c108131995529d5f02392c446 - Patch
References () https://git.kernel.org/stable/c/33a3149dd81a1e2f52b80ee1e0fc380b39f3d028 - () https://git.kernel.org/stable/c/33a3149dd81a1e2f52b80ee1e0fc380b39f3d028 - Patch
References () https://git.kernel.org/stable/c/3733fce2871c9bca9dd18a1a23b1432ea215a094 - () https://git.kernel.org/stable/c/3733fce2871c9bca9dd18a1a23b1432ea215a094 - Patch
References () https://git.kernel.org/stable/c/438b1f668ad58f46ce699bb48e4698a7839e3f9e - () https://git.kernel.org/stable/c/438b1f668ad58f46ce699bb48e4698a7839e3f9e - Patch
References () https://git.kernel.org/stable/c/b66920a3348c0f63ba18365248fa21fbf0b3a937 - () https://git.kernel.org/stable/c/b66920a3348c0f63ba18365248fa21fbf0b3a937 - 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 : 2026-05-19 20:42

NVD link : CVE-2026-43091

Mitre link : CVE-2026-43091

CVE.ORG link : CVE-2026-43091

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo