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CVE-2026-68309— wifi: mt76: connac: fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv()

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.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.12版本存在安全漏洞，该漏洞源于mt76_connac_get_he_phy_cap例程可能返回NULL，未检查cap指针便进行解引用，可能导致空指针取消引用。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8< d1f8705d6545d20950991785306d08884b0056fc affected
d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8< 91eb15c026debd8b7bfbd83f062e6245a4e69964 affected
d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8< b09508dd7bc4a8948ea00603041a918c09788502 affected
d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8< 2afc2d5098866518a5c446a2e647b1b3f43daaf4 affected
d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8< c058786b09cfab080125bc3ee7928a181dcbd37a affected
d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8< 8709c66e665a2a09192853d4f3d0fb4bd0f76403 affected
d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8< 2c1fb2335f5e3afb34f91bc07ecb63517c328090 affected
5.12 affected
… +8 more rows
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I. Basic Information for CVE-2026-68309

Vulnerability Information
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Vulnerability Title
wifi: mt76: connac: fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: connac: fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv() mt76_connac_get_he_phy_cap routine can theoretically return NULL so check cap pointer before dereferencing it.
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 5.12版本存在安全漏洞，该漏洞源于mt76_connac_get_he_phy_cap例程可能返回NULL，未检查cap指针便进行解引用，可能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

Vendor Product Affected Versions CPE Subscribe
Linux Linux d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 ~ d1f8705d6545d20950991785306d08884b0056fc -
Linux Linux 5.12 -

II. Public POCs for CVE-2026-68309

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III. Intelligence Information for CVE-2026-68309

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Patches & Fixes for CVE-2026-68309 (7)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68309

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