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CVE-2026-31620— ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0

AI Predicted 3.3 Difficulty: Moderate EPSS 0.20% · P9

Possible ATT&CK Techniques 1AI

T1200 · Hardware Additions

Affected Version Matrix 10

VendorProductVersion RangeStatus
LinuxLinuxdee1bcf28a3dd13ddb2e9200407864f73e9c4d63< 09b145c1f1331c40dc955c0024d636f25417cddbaffected
dee1bcf28a3dd13ddb2e9200407864f73e9c4d63< fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602affected
dee1bcf28a3dd13ddb2e9200407864f73e9c4d63< d04dd67ab10dc978c6c843c6bd6a2a66a9444f51affected
dee1bcf28a3dd13ddb2e9200407864f73e9c4d63< 48bd344e1040b9f2eb512be73c13f5db83efc191affected
6.18affected
< 6.18unaffected
6.18.24≤ 6.18.*unaffected
6.19.14≤ 6.19.*unaffected
… +2 more rows
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I. Basic Information for CVE-2026-31620

Vulnerability Information
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Vulnerability Title
ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0 A malicious USB device with the TASCAM US-144MKII device id can have a configuration containing bInterfaceNumber=1 but no interface 0. USB configuration descriptors are not required to assign interface numbers sequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will then be dereferenced directly. Fix this up by checking the return value properly.
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us144mkii中缺少接口0时空指针解引用。
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 dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 ~ 09b145c1f1331c40dc955c0024d636f25417cddb -
LinuxLinux 6.18 -

II. Public POCs for CVE-2026-31620

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III. Intelligence Information for CVE-2026-31620

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Patches & Fixes for CVE-2026-31620 (1)

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

CVE-2026-316499.8 CRITICALnet: stmmac: fix integer underflow in chain mode
CVE-2026-316079.8 CRITICALusbip: validate number_of_packets in usbip_pack_ret_submit()
CVE-2026-316089.8 CRITICALsmb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list
CVE-2026-316339.8 CRITICALrxrpc: Fix integer overflow in rxgk_verify_response()
CVE-2026-315369.8 CRITICALsmb: server: let send_done handle a completion without IB_SEND_SIGNALED
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-2026-315899.8 CRITICALmm: call ->free_folio() directly in folio_unmap_invalidate()
CVE-2026-316099.8 CRITICALsmb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
CVE-2026-316579.8 CRITICALbatman-adv: hold claim backbone gateways by reference
CVE-2026-316599.8 CRITICALbatman-adv: reject oversized global TT response buffers
CVE-2026-316379.8 CRITICALrxrpc: reject undecryptable rxkad response tickets
CVE-2026-316369.1 CRITICALrxrpc: fix RESPONSE authenticator parser OOB read
CVE-2026-315708.8 HIGHcan: gw: fix OOB heap access in cgw_csum_crc8_rel()
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-2026-316298.8 HIGHnfc: llcp: add missing return after LLCP_CLOSED checks
CVE-2026-316228.8 HIGHNFC: digital: Bounds check NFC-A cascade depth in SDD response handler
CVE-2026-315888.8 HIGHKVM: x86: Use scratch field in MMIO fragment to hold small write values
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-2026-31620

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