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CVE-2026-98582— nfc: st21nfca: validate received frame size

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: st21nfca：验证接收到的帧长度 st21nfca_hci_i2c_repack() 函数在去除字节填充（byte stuffing）之前，会先根据帧结束（EOF）标记截断接收到的帧。随后，该函数假设截断后的帧包含 LLC 头部和两个 CRC 字节，并会无条件地读取转义标记（escape marker）之后的字节。 畸形帧可能将 EOF 标记直接置于起始标记之后，或者在其数据部分以转义标记结尾。前者会导致 check_crc() 函数可用的字节数不足，后者

AI Predicted 7.8 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3096e25a3e40b73afd59e46f3bf8d84f919992a1< 8934d2889ae16a7c77520e002398d0689c1ecea5 affected
3096e25a3e40b73afd59e46f3bf8d84f919992a1< d0596ee6c4b928a5c288790522a7495ee867da72 affected
3096e25a3e40b73afd59e46f3bf8d84f919992a1< f526c218a149a30f110ce434ff17e033042404b8 affected
3096e25a3e40b73afd59e46f3bf8d84f919992a1< d4008c3499dba7829bfe002edd99a8bff8ae3a7c affected
3096e25a3e40b73afd59e46f3bf8d84f919992a1< 91be5161f37b0a2795ad6806d69be5fa74522e5c affected
3096e25a3e40b73afd59e46f3bf8d84f919992a1< 57919d0662d8856211b794140172e51ca389f23d affected
3096e25a3e40b73afd59e46f3bf8d84f919992a1< 7b996cc06dda54c02a5aa607bda01109f0ac51e6 affected
3096e25a3e40b73afd59e46f3bf8d84f919992a1< a653c01ce447f10c36b901646888c0330363af4f affected
… +10 more rows
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I. Basic Information for CVE-2026-98582

Vulnerability Information
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Vulnerability Title
nfc: st21nfca: validate received frame size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfc: st21nfca: validate received frame size st21nfca_hci_i2c_repack() trims a received frame at its EOF marker before removing byte stuffing. It then assumes the truncated frame contains the LLC header and two CRC bytes, and it unconditionally reads the byte after an escape marker. A malformed frame can place EOF immediately after the start marker or can end its data portion with an escape marker. The former leaves too few bytes for check_crc(), while the latter makes the unstuffing loop read past the current skb length. Require the minimum framing bytes both before and after unstuffing. Use separate input and output cursors while removing byte stuffing, and reject an escape marker without its encoded byte. This keeps malformed frames within the received frame boundary before CRC processing.
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 3096e25a3e40b73afd59e46f3bf8d84f919992a1 ~ 8934d2889ae16a7c77520e002398d0689c1ecea5 -
Linux Linux 3.16 -

II. Public POCs for CVE-2026-98582

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III. Intelligence Information for CVE-2026-98582

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Patches & Fixes for CVE-2026-98582 (8)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98720 KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified
CVE-2026-98733 Bluetooth: hci_core: Serialize fragmented ISO packet queueing
CVE-2026-98732 Bluetooth: btintel: fix buffer over-read in btintel_hw_error()
CVE-2026-98731 Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
CVE-2026-98730 Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()
CVE-2026-98729 x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h
CVE-2026-98728 tpm: fix off-by-four bounds check in tpm2_get_random()
CVE-2026-98727 nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
CVE-2026-98726 nvme-multipath: fix underflow in ANA log bounds checks
CVE-2026-98725 nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
CVE-2026-98724 nvmet: pci-epf: reject too-short SGL segments
CVE-2026-98723 nvmet: copy the hostid into the ctrl before creating PR pc_refs
CVE-2026-98722 mtd: block2mtd: Fix divide error when erase_size is zero
CVE-2026-98721 mtd: rawnand: cadence: Initialize IRQ state before requesting IRQ
CVE-2026-98709 wifi: mac80211: count only matching reservations in reserved switch
CVE-2026-98712 KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
CVE-2026-98711 wifi: cw1200: fix TX padding OOB read leaking heap data to device
CVE-2026-98710 wifi: iwlegacy: 3945: free EEPROM data on remove
CVE-2026-98713 KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT
CVE-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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