Information disclosure in Linux kernel - CVE-2026-46000
Published: May 28, 2026
Vulnerability identifier: #VU132492
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46000
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to improper handling of shared packet buffers in RxRPC conn-level packet handling when processing RESPONSE packets. A local user can observe decrypted packet contents through a packet sniffer to disclose sensitive information.
The issue occurs when the sk_buff containing a RESPONSE packet is cloned and shared with a packet sniffer.
How to mitigate CVE-2026-46000
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/24481a7f573305706054c59e275371f8d0fe919f
- https://git.kernel.org/stable/c/98a2046d155f73f6cf5d2c493c5e09b4963e2e12
- https://git.kernel.org/stable/c/c0428a22daf69714dc042b67ea759956b74c74e5
- https://git.kernel.org/stable/c/ca71ac2de389b01eecdc48bfafbdf073ec232044
- https://git.kernel.org/stable/c/d9b93a0f57ca5f6831bfaa34014b6cd705564a00