Out-of-bounds read in Linux kernel - CVE-2026-98576
Published: October 22, 2026
Vulnerability identifier: #VU156879
CSH Severity: Low
CVSS v4: 4.8 [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]
CVE-ID: CVE-2026-98576
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to potentially disclose kernel memory contents through debug output.
The vulnerability exists due to an out-of-bounds read in the Linux kernel NFC LLCP functions nfc_llcp_wks_sap() and nfc_llcp_build_sdreq_tlv() when logging non-null-terminated service names. A local user can supply a non-null-terminated service name that is passed to pr_debug() with the %s format specifier to trigger reads beyond the allocated buffer and potentially expose adjacent kernel memory in debug output.
Affected software
Linux kernel
How to mitigate CVE-2026-98576
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/4262b12277a3e056c95fc49e9c4d7bd97035d16c
- https://git.kernel.org/stable/c/6d4ca872830e46fcca9c086bf19fa9bd2faf09d2
- https://git.kernel.org/stable/c/75bfd9ef4da2fb49dac1f19880d2ac4ccd07b45b
- https://git.kernel.org/stable/c/75f7c5a42fa1483f5912279a749417c284ad708f
- https://git.kernel.org/stable/c/7dcf371a35632f035baf77bcf2c129165f772ce4
- https://git.kernel.org/stable/c/8978dff632519712d1fa432991e1f2e857f90239
- https://git.kernel.org/stable/c/8afb6c194f5781798d3ab3edf243cf5a24a9d1f9
- https://git.kernel.org/stable/c/a143f7835faa4fe0178448289feea4f84eeee8d6