🛡️ CVE-2025-21651 — kernel

🟡 CVSS 4.7 — Medium ✅ No Known Exploit NVD
4.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

net: hns3: don't auto enable misc vector

In the Linux kernel, the following vulnerability has been resolved:

net: hns3: don't auto enable misc vector

Currently, there is a time window between misc irq enabled

and service task inited. If an interrupte is reported at

this time, it will cause warning like below:

[ 16.324639] Call trace:

[ 16.324641] __queue_delayed_work+0xb8/0xe0

[ 16.324643] mod_delayed_work_on+0x78/0xd0

[ 16.324655] hclge_errhand_task_schedule+0x58/0x90 [hclge]

[ 16.324662] hclge_misc_irq_handle+0x168/0x240 [hclge]

[ 16.324666] __handle_irq_event_percpu+0x64/0x1e0

[ 16.324667] handle_irq_event+0x80/0x170

[ 16.324670] handle_fasteoi_edge_irq+0x110/0x2bc

[ 16.324671] __handle_domain_irq+0x84/0xfc

[ 16.324673] gic_handle_irq+0x88/0x2c0

[ 16.324674] el1_irq+0xb8/0x140

[ 16.324677] arch_cpu_idle+0x18/0x40

[ 16.324679] default_idle_call+0x5c/0x1bc

[ 16.324682] cpuidle_idle_call+0x18c/0x1c4

[ 16.324684] do_idle+0x174/0x17c

[ 16.324685] cpu_startup_entry+0x30/0x6c

[ 16.324687] secondary_start_kernel+0x1a4/0x280

[ 16.324688] ---[ end trace 6aa0bff672a964aa ]---

So don't auto enable misc vector when request irq..

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2025-21651 is recorded against 2 packages.

  • kernel (from 5.4.0 up to 6.12.10)
  • linux-kernel

Timeline and source

Published on 19 January 2025 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2025-21651 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 4.7
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-01-19
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 5.4.0 6.12.10
linux-kernel — —

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