CVE-2026-98576
Published Oct 18, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: fix slab-out-of-bounds reads when logging service names nfc_llcp_wks_sap() and nfc_llcp_build_sdreq_tlv() pass non-null- terminated strings to pr_debug() using the %s format specifier. The buffers are allocated via kmemdup() or come from netlink attributes and are not guaranteed to be null-terminated, causing __dynamic_pr_debug() to read beyond the allocated region: KASAN: slab-out-of-bounds Read in __dynamic_pr_debug Fix both call sites by using %.*s with the explicit length to limit the output to the actual length of the string.
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References
Other 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
Frequently Asked Questions
What is CVE-2026-98576? +
In the Linux kernel, the following vulnerability has been resolved:
nfc: llcp: fix slab-out-of-bounds reads when logging service names
nfc_llcp_wks_sap() and nfc_llcp_build_sdreq_tlv() pass non-null-
terminated strings to pr_debug() using the %s format specifier.
The buffers are allocated via kmemdup() or come from netlink
attributes and are not guaranteed to be null-terminated, causing
__dynamic_pr_debug() to read beyond the allocated region:
KASAN: slab-out-of-bounds Read in __dynamic_pr_debug
Fix both call sites by using %.*s with the explicit length to limit
the output to the actual length of the string.
How do I check if I'm vulnerable to CVE-2026-98576? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.