CVE-2025-39677 is a vulnerability in the Linux kernel's networking scheduler, specifically affecting the hhf, fq, fq_codel, and fq_pie qdiscs. It stems from incorrect backlog accounting when adjusting qdisc limits, leading to an underflow in the parent tbf qdisc's backlog. This issue is rated Medium severity (CVSS 5.5) with a local attack vector, low attack complexity, and high impact on availability. There is no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.5, < 6.16.4CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
6.17CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* | ||
6.17CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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