CVE-2025-21826— netfilter: nf_tables: reject mismatching sum of field_len with set key length
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 22
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 2d4c0798a1ef8db15b3277697ac2def4eda42312< 6b467c8feac759f4c5c86d708beca2aa2b29584f | affected |
77be8c495a3f841e88b46508cc20d3d7d3289da3< 5083a7ae45003456c253e981b30a43f71230b4a3 | affected | ||
9cb084df01e198119de477ac691d682fb01e80f3< 2ac254343d3cf228ae0738b2615fedf85d000752 | affected | ||
dc45bb00e66a33de1abb29e3d587880e1d4d9a7e< 82e491e085719068179ff6a5466b7387cc4bbf32 | affected | ||
3ce67e3793f48c1b9635beb9bb71116ca1e51b58< 49b7182b97bafbd5645414aff054b4a65d05823d | affected | ||
3ce67e3793f48c1b9635beb9bb71116ca1e51b58< ab50d0eff4a939d20c37721fd9766347efcdb6f6 | affected | ||
3ce67e3793f48c1b9635beb9bb71116ca1e51b58< 1b9335a8000fb70742f7db10af314104b6ace220 | affected | ||
ff67e3e488090908dc015ba04d7407d8bd467f7e | affected | ||
| … +14 more rows | |||
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I. Basic Information for CVE-2025-21826
Vulnerability Information
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Vulnerability Title
netfilter: nf_tables: reject mismatching sum of field_len with set key length
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject mismatching sum of field_len with set key length The field length description provides the length of each separated key field in the concatenation, each field gets rounded up to 32-bits to calculate the pipapo rule width from pipapo_init(). The set key length provides the total size of the key aligned to 32-bits. Register-based arithmetics still allows for combining mismatching set key length and field length description, eg. set key length 10 and field description [ 5, 4 ] leading to pipapo width of 12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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nf_tables拒绝字段长度与集合密钥长度不匹配的情况。
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-2025-21826
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2025-21826 (5)
Other References for CVE-2025-21826 (1)
Same Patch Batch · Linux · 2025-03-06 · 46 CVEs total
| CVE-2025-21829 | 9.8 CRITICAL | RDMA/rxe: Fix the warning "__rxe_cleanup+0x12c/0x170 [rdma_rxe]" |
| CVE-2025-21828 | 8.8 HIGH | wifi: mac80211: don't flush non-uploaded STAs |
| CVE-2025-21825 | 7.8 HIGH | bpf: Cancel the running bpf_timer through kworker for PREEMPT_RT |
| CVE-2024-58070 | 7.8 HIGH | bpf: bpf_local_storage: Always use bpf_mem_alloc in PREEMPT_RT |
| CVE-2025-21832 | 7.8 HIGH | block: don't revert iter for -EIOCBQUEUED |
| CVE-2024-58083 | 7.8 HIGH | KVM: Explicitly verify target vCPU is online in kvm_get_vcpu() |
| CVE-2024-58069 | 7.8 HIGH | rtc: pcf85063: fix potential OOB write in PCF85063 NVMEM read |
| CVE-2024-58086 | 7.8 HIGH | drm/v3d: Stop active perfmon if it is being destroyed |
| CVE-2024-58060 | 7.8 HIGH | bpf: Reject struct_ops registration that uses module ptr and the module btf_id is missing |
| CVE-2024-58075 | 7.8 HIGH | crypto: tegra - do not transfer req when tegra init fails |
| CVE-2025-21827 | 7.8 HIGH | Bluetooth: btusb: mediatek: Add locks for usb_driver_claim_interface() |
| CVE-2024-58079 | 7.8 HIGH | media: uvcvideo: Fix crash during unbind if gpio unit is in use |
| CVE-2024-58053 | 7.5 HIGH | rxrpc: Fix handling of received connection abort |
| CVE-2025-21830 | 7.3 HIGH | landlock: Handle weird files |
| CVE-2024-58066 | clk: mmp: pxa1908-apbcp: Fix a NULL vs IS_ERR() check | |
| CVE-2024-58064 | wifi: cfg80211: tests: Fix potential NULL dereference in test_cfg80211_parse_colocated_ap( | |
| CVE-2024-58061 | wifi: mac80211: prohibit deactivating all links | |
| CVE-2024-58063 | wifi: rtlwifi: fix memory leaks and invalid access at probe error path | |
| CVE-2024-58065 | clk: mmp: pxa1908-apbc: Fix NULL vs IS_ERR() check | |
| CVE-2024-58062 | wifi: iwlwifi: mvm: avoid NULL pointer dereference |
Showing top 20 of 46 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-68480
x86/bugs: Make Safe-RET robust against interrupt injection - CVE-2026-64604
KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is - CVE-2026-64602
iio: adc: spear: Initialize completion before requesting IRQ - CVE-2026-64603
platform/x86: intel-hid: Protect ACPI notify handler against - CVE-2026-64601
ALSA: us144mkii: capture_urb_complete: redundant usb_anchor_
Same vendor: Linux
- CVE-2026-68480
x86/bugs: Make Safe-RET robust against interrupt injection - CVE-2026-64604
KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is - CVE-2026-64602
iio: adc: spear: Initialize completion before requesting IRQ - CVE-2026-64603
platform/x86: intel-hid: Protect ACPI notify handler against - CVE-2026-64601
ALSA: us144mkii: capture_urb_complete: redundant usb_anchor_
V. Comments for CVE-2025-21826
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