What’s Vulnerable › Vulnerabilities

CVE-2026-98576: nfc: llcp: fix slab-out-of-bounds reads when logging service names

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

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.

Affected products

• Linux kernel: 3.10 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

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

Get alerted when CVE-2026-98576 or the next vulnerability affects your stack