ReportizFlow
This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Metrics
Affected Vendors & Products
| Vendors | Products |
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| Linux |
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No data.
No data.
References
No reference.
History
Mon, 19 Oct 2026 15:30:00 +0000
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| References |
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Mon, 19 Oct 2026 14:30:00 +0000
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| Description | In the Linux kernel, the following vulnerability has been resolved: net/sched: fq: clamp quantum and initial_quantum in change path The fq change path accepts TCA_FQ_QUANTUM in [1, INT_MAX] and TCA_FQ_INITIAL_QUANTUM up to INT_MAX, while fq_init() already clamps to [1, 1<<20]. A user can override the init clamp via tc qdisc change, restoring the small-quantum deficit spin that the init clamp prevents. Narrow iq_range.max to 1<<20 so TCA_FQ_INITIAL_QUANTUM is rejected at parse time. Clamp TCA_FQ_QUANTUM to [256, 1<<20] in fq_change() and fq_init() quantum to [256, 1<<20] for tiny-MTU devices. Conditions to recreate the bug: CONFIG_NET_SCH_FQ=y. Requires CAP_NET_ADMIN (namespace-local via unshare -Urn suffices). tc qdisc add dev dummy0 root fq tc qdisc change dev dummy0 root fq quantum 1 stab data 32768 size_log 15 cell_log 0 | This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. |
| Title | net/sched: fq: clamp quantum and initial_quantum in change path | |
| CPEs |
Sun, 20 Sep 2026 04:30:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-20 CWE-400 |
Thu, 17 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | In the Linux kernel, the following vulnerability has been resolved: net/sched: fq: clamp quantum and initial_quantum in change path The fq change path accepts TCA_FQ_QUANTUM in [1, INT_MAX] and TCA_FQ_INITIAL_QUANTUM up to INT_MAX, while fq_init() already clamps to [1, 1<<20]. A user can override the init clamp via tc qdisc change, restoring the small-quantum deficit spin that the init clamp prevents. Narrow iq_range.max to 1<<20 so TCA_FQ_INITIAL_QUANTUM is rejected at parse time. Clamp TCA_FQ_QUANTUM to [256, 1<<20] in fq_change() and fq_init() quantum to [256, 1<<20] for tiny-MTU devices. Conditions to recreate the bug: CONFIG_NET_SCH_FQ=y. Requires CAP_NET_ADMIN (namespace-local via unshare -Urn suffices). tc qdisc add dev dummy0 root fq tc qdisc change dev dummy0 root fq quantum 1 stab data 32768 size_log 15 cell_log 0 | |
| Title | net/sched: fq: clamp quantum and initial_quantum in change path | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
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MITRE
Status: REJECTED
Assigner: Linux
Published: 2026-09-17T16:05:36.970Z
Updated: 2026-10-19T14:06:05.197Z
Reserved: 2026-09-11T19:38:34.783Z
Link: CVE-2026-90050
Vulnrichment
No data.
NVD
Status : Rejected
Published: 2026-09-17T17:16:53.363
Modified: 2026-10-19T15:17:09.497
Link: CVE-2026-90050
Redhat
No data.