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CVE-2026-74341— wifi: wcn36xx: fix heap overflow from oversized firmware HAL response

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 3.13版本存在安全漏洞，该漏洞源于固件响应调度器未验证HAL响应长度，可能导致堆缓冲区溢出。

CVSS 8.8 · High EPSS 0.34% · P27

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 8e84c25821698bdef73c0329fb2022a4673b7adc< dae9cadf0925f1cbfb71306d60490890df3870a6 affected
8e84c25821698bdef73c0329fb2022a4673b7adc< cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92 affected
8e84c25821698bdef73c0329fb2022a4673b7adc< 15545ee71301e82d26d9a31b407ed0019eb62a60 affected
8e84c25821698bdef73c0329fb2022a4673b7adc< 1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18 affected
8e84c25821698bdef73c0329fb2022a4673b7adc< 18813b90032bfaafb225906a4d2b51be4dfc02c3 affected
8e84c25821698bdef73c0329fb2022a4673b7adc< 88a240d86d3d64521f9194abe185ac71cc74d0bd affected
3.13 affected
< 3.13 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-74341

Vulnerability Information
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Vulnerability Title
wifi: wcn36xx: fix heap overflow from oversized firmware HAL response
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix heap overflow from oversized firmware HAL response The firmware response dispatcher copies all synchronous HAL responses into the 4096-byte hal_buf without validating the response length. A response exceeding WCN36XX_HAL_BUF_SIZE causes a heap buffer overflow with firmware-controlled content. Add a bounds check on the response length.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 3.13版本存在安全漏洞，该漏洞源于固件响应调度器未验证HAL响应长度，可能导致堆缓冲区溢出。
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 8e84c25821698bdef73c0329fb2022a4673b7adc ~ dae9cadf0925f1cbfb71306d60490890df3870a6 -
Linux Linux 3.13 -

II. Public POCs for CVE-2026-74341

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III. Intelligence Information for CVE-2026-74341

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Patches & Fixes for CVE-2026-74341 (5)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-74350 9.8 CRITICAL ocfs2: validate fast symlink target during inode read
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72248 9.8 CRITICAL netfilter: flowtable: support IPIP tunnel with direct xmit
CVE-2026-72494 9.8 CRITICAL RDMA/irdma: Replace waitqueue and flag with completion
CVE-2026-72083 9.8 CRITICAL scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE
CVE-2026-72098 9.8 CRITICAL dm-verity: fix buffer overflow in FEC calculation
CVE-2026-72226 9.8 CRITICAL batman-adv: tt: prevent TVLV OOB check overflow
CVE-2026-74255 9.8 CRITICAL tipc: fix UAF in tipc_l2_send_msg()
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-72084 9.8 CRITICAL scsi: target: Bound PR-OUT TransportID parsing to the received buffer
CVE-2026-72234 9.8 CRITICAL batman-adv: access unicast_ttvn skb->data only after skb realloc

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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