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CVE-2026-31661— wifi: brcmsmac: Fix dma_free_coherent() size

AI Predicted 5.5 Difficulty: Trivial EPSS 0.01% · P3

Possible ATT&CK Techniques 1AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009< f449676bab54fea1440775c8c915dadb323fe015affected
5b435de0d786869c95d1962121af0d7df2542009< 3c204a0fd079fa7a867151a47d830ad1c2db5177affected
5b435de0d786869c95d1962121af0d7df2542009< 0f87777b74bcce29b966ec42d9aa8f9edd9b1667affected
5b435de0d786869c95d1962121af0d7df2542009< 4bf41c2731a0549e21f66180ff780b1e036639abaffected
5b435de0d786869c95d1962121af0d7df2542009< 77263f053963dea9f3962505ac0c768853d7dc59affected
5b435de0d786869c95d1962121af0d7df2542009< b27fa888e4a426a3bcf6f6ab24701d888d9bf5aaaffected
5b435de0d786869c95d1962121af0d7df2542009< 01f1330d3d1bee07e0c42d40cc48b7be8b6dad84affected
5b435de0d786869c95d1962121af0d7df2542009< 12cd7632757a54ce586e36040210b1a738a0fc53affected
… +10 more rows
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I. Basic Information for CVE-2026-31661

Vulnerability Information
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Vulnerability Title
wifi: brcmsmac: Fix dma_free_coherent() size
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmsmac: Fix dma_free_coherent() size dma_alloc_consistent() may change the size to align it. The new size is saved in alloced. Change the free size to match the allocation size.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于brcmsmac驱动中dma_free_coherent大小不匹配，可能导致内存损坏。
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 5b435de0d786869c95d1962121af0d7df2542009 ~ f449676bab54fea1440775c8c915dadb323fe015 -
LinuxLinux 3.2 -

II. Public POCs for CVE-2026-31661

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III. Intelligence Information for CVE-2026-31661

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Same Patch Batch · Linux · 2026-04-24 · 138 CVEs total

CVE-2026-316099.8 CRITICALsmb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
CVE-2026-316089.8 CRITICALsmb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list
CVE-2026-316079.8 CRITICALusbip: validate number_of_packets in usbip_pack_ret_submit()
CVE-2026-316339.8 CRITICALrxrpc: Fix integer overflow in rxgk_verify_response()
CVE-2026-316699.8 CRITICALmptcp: fix slab-use-after-free in __inet_lookup_established
CVE-2026-316689.8 CRITICALseg6: separate dst_cache for input and output paths in seg6 lwtunnel
CVE-2026-315369.8 CRITICALsmb: server: let send_done handle a completion without IB_SEND_SIGNALED
CVE-2026-316579.8 CRITICALbatman-adv: hold claim backbone gateways by reference
CVE-2026-316379.8 CRITICALrxrpc: reject undecryptable rxkad response tickets
CVE-2026-315899.8 CRITICALmm: call ->free_folio() directly in folio_unmap_invalidate()
CVE-2026-316499.8 CRITICALnet: stmmac: fix integer underflow in chain mode
CVE-2026-316599.8 CRITICALbatman-adv: reject oversized global TT response buffers
CVE-2026-316369.1 CRITICALrxrpc: fix RESPONSE authenticator parser OOB read
CVE-2026-316228.8 HIGHNFC: digital: Bounds check NFC-A cascade depth in SDD response handler
CVE-2026-315588.8 HIGHLoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust
CVE-2026-315538.8 HIGHKVM: arm64: Fix the descriptor address in __kvm_at_swap_desc()
CVE-2026-315888.8 HIGHKVM: x86: Use scratch field in MMIO fragment to hold small write values
CVE-2026-315708.8 HIGHcan: gw: fix OOB heap access in cgw_csum_crc8_rel()
CVE-2026-316298.8 HIGHnfc: llcp: add missing return after LLCP_CLOSED checks
CVE-2026-316118.6 HIGHksmbd: require 3 sub-authorities before reading sub_auth[2]

Showing top 20 of 138 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31661

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