Out-of-bounds read in Linux kernel - CVE-2026-98582
Published: October 22, 2026
Vulnerability identifier: #VU156885
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98582
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker on the local network to trigger out-of-bounds reads that may cause a denial of service.
The vulnerability exists due to out-of-bounds reads in the Linux kernel's st21nfca_hci_i2c_repack() function when processing malformed received frames. A remote attacker on the local network can supply a frame with an EOF marker immediately after the start marker or a trailing escape marker to cause CRC processing or byte unstuffing to read beyond the received frame boundary, potentially causing a kernel crash.
Affected software
Linux kernel
How to mitigate CVE-2026-98582
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/57919d0662d8856211b794140172e51ca389f23d
- https://git.kernel.org/stable/c/7b996cc06dda54c02a5aa607bda01109f0ac51e6
- https://git.kernel.org/stable/c/8934d2889ae16a7c77520e002398d0689c1ecea5
- https://git.kernel.org/stable/c/91be5161f37b0a2795ad6806d69be5fa74522e5c
- https://git.kernel.org/stable/c/a653c01ce447f10c36b901646888c0330363af4f
- https://git.kernel.org/stable/c/d0596ee6c4b928a5c288790522a7495ee867da72
- https://git.kernel.org/stable/c/d4008c3499dba7829bfe002edd99a8bff8ae3a7c
- https://git.kernel.org/stable/c/f526c218a149a30f110ce434ff17e033042404b8