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CVE-2026-23083— fou: Don't allow 0 for FOU_ATTR_IPPROTO.

EPSS 0.02% · P5
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I. Basic Information for CVE-2026-23083

Vulnerability Information
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Vulnerability Title
fou: Don't allow 0 for FOU_ATTR_IPPROTO.
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOU_ATTR_IPPROTO. fou_udp_recv() has the same problem mentioned in the previous patch. If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu(). Let's forbid 0 for FOU_ATTR_IPPROTO.
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，该漏洞源于允许FOU_ATTR_IPPROTO设置为0，可能导致数据包未释放。
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 23461551c00628c3f3fe9cf837bf53cf8f212b63 ~ c7498f9bc390479ccfad7c7f2332237ff4945b03 -
LinuxLinux 3.18 -

II. Public POCs for CVE-2026-23083

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III. Intelligence Information for CVE-2026-23083

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Same Patch Batch · Linux · 2026-02-04 · 79 CVEs total

CVE-2026-230988.8 HIGHnetrom: fix double-free in nr_route_frame()
CVE-2026-230777.8 HIGHmm/vma: fix anon_vma UAF on mremap() faulted, unfaulted merge
CVE-2026-230747.8 HIGHnet/sched: Enforce that teql can only be used as root qdisc
CVE-2026-231037.8 HIGHipvlan: Make the addrs_lock be per port
CVE-2026-230667.8 HIGHrxrpc: Fix recvmsg() unconditional requeue
CVE-2026-231057.8 HIGHnet/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag
CVE-2026-230957.5 HIGHgue: Fix skb memleak with inner IP protocol 0.
CVE-2026-23063uacce: ensure safe queue release with state management
CVE-2026-23061can: kvaser_usb: kvaser_usb_read_bulk_callback(): fix URB memory leak
CVE-2026-23062platform/x86: hp-bioscfg: Fix kernel panic in GET_INSTANCE_ID macro
CVE-2026-23064net/sched: act_ife: avoid possible NULL deref
CVE-2026-23058can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak
CVE-2026-23057vsock/virtio: Coalesce only linear skb
CVE-2026-23056uacce: implement mremap in uacce_vm_ops to return -EPERM
CVE-2025-71199iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver
CVE-2025-71198iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection
CVE-2025-71197w1: therm: Fix off-by-one buffer overflow in alarms_store
CVE-2026-23055i2c: riic: Move suspend handling to NOIRQ phase
CVE-2026-23053NFS: Fix a deadlock involving nfs_release_folio()
CVE-2026-23051drm/amdgpu: fix drm panic null pointer when driver not support atomic

Showing top 20 of 79 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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