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

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：在销毁时关闭 RX BA 会话定时器 销毁 RX BA（接收块确认）会话时，可能会将会话定时器保留在已被释放的 结构上。随后，定时器轮（timer-wheel）的处理逻辑以及定时器回调函数本身会尝试访问已释放的内存，从而引发问题。 RX BAR（块确认请求）处理程序可能在销毁操作尚未通过 RCU 机制取消发布 之前，就在 RCU 保护下对该结构进行解引用；同时，该处理程序可能仍处于其读侧临界区，而此时销毁操作已删除了会话定时器。这种过时的处

AI Predicted 7.8 Difficulty: Hard EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux a87f736d942c86255e3088c606f0e3eab6bbf784< 7bb2a5bd4f07192fca35644fab7d49a17bfbc861 affected
a87f736d942c86255e3088c606f0e3eab6bbf784< 481f9230284c27052b59c587069f232c5d84779e affected
a87f736d942c86255e3088c606f0e3eab6bbf784< 09b7d5e4f88504e62ddf4ff31ebeebb3b87578ba affected
a87f736d942c86255e3088c606f0e3eab6bbf784< e588e83e5c7a0f6d7a77dbbb58927c8c8cfd598e affected
2.6.36 affected
< 2.6.36 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-2026-98707

Vulnerability Information
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Vulnerability Title
wifi: mac80211: shut down RX BA session timer on teardown
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: shut down RX BA session timer on teardown Tearing down an RX BA session can leave the session timer queued on a freed tid_rx. Later timer-wheel processing and the timer callback itself then run against freed memory. An RX BAR handler can dereference tid_rx under RCU before teardown unpublishes it and stay in its read-side critical section while teardown deletes the session timer. The stale handler can then rearm the timer after timer_delete_sync() returns and before the RCU callback frees tid_rx. Use timer_shutdown_sync() so rearm attempts become ineffective once teardown starts. Keep reorder_timer unchanged: teardown marks the session removed under reorder_lock and its release path checks that state before rearming. session_timer has no equivalent guard because ieee80211_rx_h_ctrl() rearms it before taking reorder_lock.
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 a87f736d942c86255e3088c606f0e3eab6bbf784 ~ 7bb2a5bd4f07192fca35644fab7d49a17bfbc861 -
Linux Linux 2.6.36 -

II. Public POCs for CVE-2026-98707

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III. Intelligence Information for CVE-2026-98707

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Patches & Fixes for CVE-2026-98707 (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-2026-98709 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-2026-98708 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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