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CVE-2026-98731— Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()

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： Bluetooth: btintel_pcie: 修复 btintel_pcie_recv_frame() 函数中的 plen 溢出问题 plen 是一个 u16 类型变量，其计算方式为 HDR_SIZE + dlen。对于 ACL/ISO 帧，dlen 是一个 16 位字段，因此当 dlen 的值大于等于 0xFFFC 时，求和结果会发生回绕（溢出），从而绕过"skb->len < plen"的检查，导致 skb_trim() 错误地截断数据包。 通过将 plen 的

AI Predicted 5.9 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux c2b636b3f788d10486a6691ad6dd3ec4c93bd78e< c3a3842c109ac130c6db3aa0014cc8cd344928ad affected
c2b636b3f788d10486a6691ad6dd3ec4c93bd78e< c3b5e6da4ba6485bffda9753d8339c28855207aa affected
c2b636b3f788d10486a6691ad6dd3ec4c93bd78e< b2cb5ea1dc8cf829816370fc1399e6a1d2d1bca9 affected
c2b636b3f788d10486a6691ad6dd3ec4c93bd78e< 7dbeb6935ac331b0cba6c41cabd8e9d02d5f64ea affected
6.10 affected
< 6.10 unaffected
6.12.113≤ 6.12.* unaffected
6.18.56≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98731

Vulnerability Information
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Vulnerability Title
Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame() plen is u16 and computed as HDR_SIZE + dlen. For ACL/ISO frames dlen is a 16-bit field, so a value >= 0xFFFC wraps the sum, bypassing the "skb->len < plen" check and letting skb_trim() truncate the packet. Widen plen to u32 so the addition cannot wrap.
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 c2b636b3f788d10486a6691ad6dd3ec4c93bd78e ~ c3a3842c109ac130c6db3aa0014cc8cd344928ad -
Linux Linux 6.10 -

II. Public POCs for CVE-2026-98731

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III. Intelligence Information for CVE-2026-98731

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Patches & Fixes for CVE-2026-98731 (4)

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

CVE-2026-98719 KVM: SEV: Nullify "have run CPUs" mask pointer when freeing it
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-2026-98730 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-2026-98720 KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified
CVE-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown
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-2026-98709 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-2026-98708 wifi: mac80211: keep paired old chanctx alive

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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