CVE-2026-23083— fou: Don't allow 0 for FOU_ATTR_IPPROTO.
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 23461551c00628c3f3fe9cf837bf53cf8f212b63< c7498f9bc390479ccfad7c7f2332237ff4945b03 | affected |
23461551c00628c3f3fe9cf837bf53cf8f212b63< 611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea | affected | ||
23461551c00628c3f3fe9cf837bf53cf8f212b63< 6e983789b7588ee59cbf303583546c043bad8e19 | affected | ||
23461551c00628c3f3fe9cf837bf53cf8f212b63< 1cc98b8887cabb1808d2f4a37cd10a7be7574771 | affected | ||
23461551c00628c3f3fe9cf837bf53cf8f212b63< b7db31a52c3862a1a32202a273a4c32e7f5f4823 | affected | ||
23461551c00628c3f3fe9cf837bf53cf8f212b63< 9b75dff8446ec871030d8daf5a69e74f5fe8b956 | affected | ||
23461551c00628c3f3fe9cf837bf53cf8f212b63< 7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5 | affected | ||
3.18 | affected | ||
| … +8 more rows | |||
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
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
II. Public POCs for CVE-2026-23083
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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Same Patch Batch · Linux · 2026-02-04 · 79 CVEs total
| CVE-2026-23098 | 8.8 HIGH | netrom: fix double-free in nr_route_frame() |
| CVE-2026-23066 | 7.8 HIGH | rxrpc: Fix recvmsg() unconditional requeue |
| CVE-2026-23074 | 7.8 HIGH | net/sched: Enforce that teql can only be used as root qdisc |
| CVE-2026-23077 | 7.8 HIGH | mm/vma: fix anon_vma UAF on mremap() faulted, unfaulted merge |
| CVE-2026-23105 | 7.8 HIGH | net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag |
| CVE-2026-23103 | 7.8 HIGH | ipvlan: Make the addrs_lock be per port |
| CVE-2026-23095 | 7.5 HIGH | gue: Fix skb memleak with inner IP protocol 0. |
| CVE-2025-71192 | 7.0 HIGH | ALSA: ac97: fix a double free in snd_ac97_controller_register() |
| CVE-2026-23065 | platform/x86/amd: Fix memory leak in wbrf_record() | |
| CVE-2026-23064 | net/sched: act_ife: avoid possible NULL deref | |
| CVE-2026-23067 | iommu/io-pgtable-arm: fix size_t signedness bug in unmap path | |
| CVE-2026-23059 | scsi: qla2xxx: Sanitize payload size to prevent member overflow | |
| CVE-2026-23042 | idpf: fix aux device unplugging when rdma is not supported by vport | |
| CVE-2026-23058 | can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak | |
| CVE-2026-23057 | vsock/virtio: Coalesce only linear skb | |
| CVE-2026-23056 | uacce: implement mremap in uacce_vm_ops to return -EPERM | |
| CVE-2025-71199 | iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver | |
| CVE-2025-71198 | iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection | |
| CVE-2025-71197 | w1: therm: Fix off-by-one buffer overflow in alarms_store | |
| CVE-2026-23060 | crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec |
Showing top 20 of 79 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
V. Comments for CVE-2026-23083
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