Out-of-bounds read in Linux kernel - CVE-2026-93783
Published: September 25, 2026
Vulnerability identifier: #VU152112
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93783
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to read uninitialized memory.
The vulnerability exists due to an out-of-bounds read in rfcomm_recv_frame() when processing truncated Bluetooth RFCOMM frames. A remote attacker can send a truncated Bluetooth RFCOMM frame to read uninitialized memory.
A zero-length frame can cause a length underflow and make skb_tail_pointer() read past the buffer.
Affected software
Linux kernel
How to mitigate CVE-2026-93783
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3