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CVE-2026-98709— wifi: mac80211: count only matching reservations in reserved switch

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： wifi: mac80211：在“预留切换”中仅统计匹配的预留项 函数在验证替换操作时，会统计 上已分配的链路，但对“预留”（reservation）的处理过于宽泛。这导致一条链路可能仍被分配给旧信道上下文（channel context），同时却持有一个属于其他替换操作的预留项。 这种情况可能使当前的替换操作过早地被视为已完成。如果另一条链路率先完成最终化（finalize），该函数可能会释放标记为 的信道上下文，而此时未匹配的链路及驱动程序仍在使用该上下文，从而在后

AI Predicted 8.8 Difficulty: Moderate EPSS 0.17% · P6

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f< d31f655e44631891788ca67018ec5e1ed1c7de86 affected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f< 03525b632908b049f4d04cc8a71cdff2329589cf affected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f< 5cc54a000960bc88f8c58940164dca0e601ab39c affected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f< 437f3727b4fd715266c296435c116288f82666fd affected
3.17 affected
< 3.17 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-2026-98709

Vulnerability Information
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Vulnerability Title
wifi: mac80211: count only matching reservations in reserved switch
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: count only matching reservations in reserved switch ieee80211_vif_use_reserved_switch() validates a replacement by counting assigned links on ctx->replace_ctx and treating reservations too broadly. A link can still be assigned to the old channel context while holding a reservation that belongs to a different replacement operation. That can make the current replacement appear complete too early. If another link finalizes first, the function can free the WILL_BE_REPLACED chanctx while the unmatched link and driver still use it, leading to a use-after-free in later beacon generation. Require an in-place reservation to point at the current replacement context, and require the reserved and assigned contexts to be the matching replacement pair, before counting or moving the link.
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 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ~ d31f655e44631891788ca67018ec5e1ed1c7de86 -
Linux Linux 3.17 -

II. Public POCs for CVE-2026-98709

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III. Intelligence Information for CVE-2026-98709

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Patches & Fixes for CVE-2026-98709 (4)

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-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown
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-2026-98708 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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