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CVE-2026-68195— wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses

AI Predicted 6.5 Difficulty: Moderate EPSS 0.20% · P10

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657< f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5affected
eb99cc95c3b6513b495c4839ac4917206705f657< 88c98ef247a3126fea9bbbda953a18a2f36c3ea7affected
eb99cc95c3b6513b495c4839ac4917206705f657< ab4d213393e846baa6437497f94dda7553cbeda7affected
eb99cc95c3b6513b495c4839ac4917206705f657< b2ab73b8123ce6cf2bc32634bfee4928676ffa66affected
eb99cc95c3b6513b495c4839ac4917206705f657< 39afc46c0243d10b7795e6e6cf4ae91f41732120affected
5.8affected
< 5.8unaffected
6.6.148≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-68195

Vulnerability Information
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Vulnerability Title
wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses PKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7615_rx_check() and mt7615_queue_rx_skb() dispatch it to mt7615_mac_tx_free() on every bus. mt7615_mac_tx_free() cleans the DMA tx queues with mt76_queue_tx_cleanup(), which calls queue_ops->tx_cleanup(). Only the mmio queue ops implement that callback; on the mt7663 USB and SDIO buses it is NULL, so a TXRX_NOTIFY there calls a NULL pointer in the RX worker. Same defect as the mt7921 and mt7925 patches in this series. Drop the event on non-mmio buses via mt76_is_mmio(), as in commit 5683e1488aa9 ("wifi: mt76: connac: do not check WED status for non-mmio devices").
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.8版本存在安全漏洞，该漏洞源于在非mmio总线上未正确丢弃TXRX_NOTIFY事件，导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux eb99cc95c3b6513b495c4839ac4917206705f657 ~ f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5 -
LinuxLinux 5.8 -

II. Public POCs for CVE-2026-68195

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III. Intelligence Information for CVE-2026-68195

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Patches & Fixes for CVE-2026-68195 (5)

Same Patch Batch · Linux · 2026-08-10 · 345 CVEs total

CVE-2026-681549.8 CRITICALlibceph: reject zero bucket types in crush_decode
CVE-2026-683819.8 CRITICALksmbd: pin conn during async oplock break notification
CVE-2026-683859.8 CRITICALs390/checksum: Fix csum_partial() without vector facility
CVE-2026-683889.8 CRITICALsmb/client: handle overlapping allocated ranges in fallocate
CVE-2026-681709.8 CRITICALmptcp: fix stale skb->sk reference on subflow close
CVE-2026-681619.8 CRITICALsctp: close UDP tunnel sockets during netns teardown
CVE-2026-681179.8 CRITICALtipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-681609.8 CRITICALceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-681599.8 CRITICALlibceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-681589.8 CRITICALlibceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-681569.8 CRITICALlibceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-681379.8 CRITICALnet/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-681369.8 CRITICALnet: gro: fix double aggregation of flush-marked skbs
CVE-2026-683029.8 CRITICALamt: re-read skb header pointers after every pull
CVE-2026-683009.8 CRITICALsctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-684269.8 CRITICALxfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-681279.8 CRITICALila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-681239.8 CRITICALopenvswitch: fix GSO userspace truncation underflow
CVE-2026-681449.8 CRITICALphonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-681249.6 CRITICALmctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 345 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68195

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