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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： nfc: llcp：修复在记录服务名称时发生的 slab 越界读取问题 和 函数将未以空字符（null-terminated）结尾的字符串传递给 ，并使用了 格式说明符。这些缓冲区是通过 分配的，或者来自 netlink 属性，因此无法保证以空字符结尾，导致 读取超出已分配内存区域： 修复方法：在这两个调用点改用 格式说明符，并显式指定字符串长度，从而将输出限制在字符串的实际长度范围内。

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d9b8d8e19b073096d3609bbd60f82148d128b555< 75f7c5a42fa1483f5912279a749417c284ad708f affected
d9b8d8e19b073096d3609bbd60f82148d128b555< 6d4ca872830e46fcca9c086bf19fa9bd2faf09d2 affected
d9b8d8e19b073096d3609bbd60f82148d128b555< a143f7835faa4fe0178448289feea4f84eeee8d6 affected
d9b8d8e19b073096d3609bbd60f82148d128b555< 75bfd9ef4da2fb49dac1f19880d2ac4ccd07b45b affected
d9b8d8e19b073096d3609bbd60f82148d128b555< 8afb6c194f5781798d3ab3edf243cf5a24a9d1f9 affected
d9b8d8e19b073096d3609bbd60f82148d128b555< 8978dff632519712d1fa432991e1f2e857f90239 affected
d9b8d8e19b073096d3609bbd60f82148d128b555< 4262b12277a3e056c95fc49e9c4d7bd97035d16c affected
d9b8d8e19b073096d3609bbd60f82148d128b555< 7dcf371a35632f035baf77bcf2c129165f772ce4 affected
… +10 more rows
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I. Basic Information for CVE-2026-98576

Vulnerability Information
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Vulnerability Title
nfc: llcp: fix slab-out-of-bounds reads when logging service names
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux d9b8d8e19b073096d3609bbd60f82148d128b555 ~ 75f7c5a42fa1483f5912279a749417c284ad708f -
Linux Linux 3.10 -

II. Public POCs for CVE-2026-98576

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III. Intelligence Information for CVE-2026-98576

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Patches & Fixes for CVE-2026-98576 (8)

Same Patch Batch · Linux · 2026-10-18 · 436 CVEs total

CVE-2026-98583 nfc: nfcmrvl: validate helper command length before pull
CVE-2026-98568 vxlan: use one headroom snapshot for neighbour replies
CVE-2026-98570 net: ipv6: keep room for the mac header in dst_dev_overhead()
CVE-2026-98571 net: stmmac: clear stale buf->page after recycling on skb build failure
CVE-2026-98572 bpf: Fix immediate JMP JEQ/JNE on MIPS32
CVE-2026-98573 net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()
CVE-2026-98574 net: bcmgenet: stop Tx NAPI before disabling the queues
CVE-2026-98575 nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()
CVE-2026-98577 nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()
CVE-2026-98578 nfc: st21nfca: validate ISO15693 inventory length
CVE-2026-98579 nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure
CVE-2026-98580 nfc: llcp: Fix race condition in accept_queue lifecycle
CVE-2026-98581 nfc: llcp: Fix list corruption / refcount desync in nfc_llcp_recv_dm()
CVE-2026-98582 nfc: st21nfca: validate received frame size
CVE-2026-98594 tg3: clean up PHYLIB resources on probe failure
CVE-2026-98591 bpf: Fix bounds check for skb-backed dynptrs
CVE-2026-98592 net: spacemit: clear TX descriptor on fragment mapping failure
CVE-2026-98593 s390/debug: Fix NULL pointer dereference in debug_info_copy()
CVE-2026-98590 bpf: Fix bpf_sock context code generation
CVE-2026-98595 udp: remove a disconnected socket from the 4-tuple hash table

Showing top 20 of 436 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98576

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