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CVE-2026-68355— wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get()

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存在安全漏洞，该漏洞源于ath11k_hal_rx_msdu_list_get函数在处理msdu_details时，当第一个条目缓冲区地址为零时访问msdu_details[i-1]（i==0），导致缓冲区下溢，可能导致越界访问。

AI Predicted 5.6 Difficulty: Moderate EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d5c65159f2895379e11ca13f62feabe93278985d< 085a5fde5bac29c01059e69399b417e91c0a6c18 affected
d5c65159f2895379e11ca13f62feabe93278985d< 31ea4b175bc3ab430be15834d9ee8a1ce65bee15 affected
d5c65159f2895379e11ca13f62feabe93278985d< 20d18a5ec6ec364fcaf0d03af6fc43dcc42c6591 affected
d5c65159f2895379e11ca13f62feabe93278985d< 69a6a4f60b2da92c0bdfd9264b8ffe053f51f52a affected
d5c65159f2895379e11ca13f62feabe93278985d< 904367381a922aa2dc3e8bd2488e6c9180516c7a affected
d5c65159f2895379e11ca13f62feabe93278985d< a154ca3c441a67d36b3a9ea63a4f11b06abe6223 affected
d5c65159f2895379e11ca13f62feabe93278985d< 725c1c3a8c5d920a7d3f5887412f2ad8e95a74f5 affected
d5c65159f2895379e11ca13f62feabe93278985d< 7f11e70629650ff6ea140984e5ce188b775b2683 affected
… +10 more rows
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I. Basic Information for CVE-2026-68355

Vulnerability Information
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Vulnerability Title
wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get() When the first entry in msdu_details has a zero buffer address, the code accesses msdu_details[i - 1] with i == 0, causing a buffer underflow. Fix similarly to ath12k_wifi7_hal_rx_msdu_list_get() by adding a separate check for i == 0 before the main condition to prevent the out-of-bounds access. Found by Linux Verification Center (linuxtesting.org) with SVACE.
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存在安全漏洞，该漏洞源于ath11k_hal_rx_msdu_list_get函数在处理msdu_details时，当第一个条目缓冲区地址为零时访问msdu_details[i-1]（i==0），导致缓冲区下溢，可能导致越界访问。
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 d5c65159f2895379e11ca13f62feabe93278985d ~ 085a5fde5bac29c01059e69399b417e91c0a6c18 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-68355

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III. Intelligence Information for CVE-2026-68355

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Patches & Fixes for CVE-2026-68355 (8)

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

CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
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-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
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-2026-68300 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-2026-68124 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-2026-68355

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