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CVE-2026-23448— net: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check

EPSS 0.03% · P7
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I. Basic Information for CVE-2026-23448

Vulnerability Information
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Vulnerability Title
net: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check cdc_ncm_rx_verify_ndp16() validates that the NDP header and its DPE entries fit within the skb. The first check correctly accounts for ndpoffset: if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) but the second check omits it: if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) This validates the DPE array size against the total skb length as if the NDP were at offset 0, rather than at ndpoffset. When the NDP is placed near the end of the NTB (large wNdpIndex), the DPE entries can extend past the skb data buffer even though the check passes. cdc_ncm_rx_fixup() then reads out-of-bounds memory when iterating the DPE array. Add ndpoffset to the nframes bounds check and use struct_size_t() to express the NDP-plus-DPE-array size more clearly.
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，该漏洞源于边界检查不当，可能导致越界读取。
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 ff06ab13a4ccae4acb44a2d4e3ece367b616ab50 ~ f1c7701d3ac91b62d672c13690cf295821f0d5c3 -
LinuxLinux 3.8 -

II. Public POCs for CVE-2026-23448

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III. Intelligence Information for CVE-2026-23448

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Same Patch Batch · Linux · 2026-04-03 · 72 CVEs total

CVE-2026-234509.8 CRITICALnet/smc: fix NULL dereference and UAF in smc_tcp_syn_recv_sock()
CVE-2026-314029.8 CRITICALnfsd: fix heap overflow in NFSv4.0 LOCK replay cache
CVE-2026-234279.8 CRITICALksmbd: fix use-after-free in durable v2 replay of active file handles
CVE-2026-234289.8 CRITICALksmbd: fix use-after-free of share_conf in compound request
CVE-2026-234559.1 CRITICALnetfilter: nf_conntrack_h323: check for zero length in DecodeQ931()
CVE-2026-234618.8 HIGHBluetooth: L2CAP: Fix use-after-free in l2cap_unregister_user
CVE-2026-234628.8 HIGHBluetooth: HIDP: Fix possible UAF
CVE-2026-234258.8 HIGHKVM: arm64: Fix ID register initialization for non-protected pKVM guests
CVE-2026-234578.6 HIGHnetfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()
CVE-2026-234568.2 HIGHnetfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case
CVE-2026-234598.2 HIGHip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS
CVE-2026-313938.1 HIGHBluetooth: L2CAP: Validate L2CAP_INFO_RSP payload length before access
CVE-2026-313928.1 HIGHsmb: client: fix krb5 mount with username option
CVE-2026-314037.8 HIGHNFSD: Hold net reference for the lifetime of /proc/fs/nfs/exports fd
CVE-2026-313897.8 HIGHspi: fix use-after-free on controller registration failure
CVE-2026-234377.8 HIGHnet: shaper: protect late read accesses to the hierarchy
CVE-2026-234587.8 HIGHnetfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()
CVE-2026-234447.8 HIGHwifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure
CVE-2026-234457.8 HIGHigc: fix page fault in XDP TX timestamps handling
CVE-2026-234497.8 HIGHnet/sched: teql: Fix double-free in teql_master_xmit

Showing top 20 of 72 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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