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CVE-2026-98010— net/sched: drr: clamp quantum in change class

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： net/sched: drr: 在 change class 中限制（clamp）quantum 值 会拒绝显式传入的 ，但在回退路径中会调用 ，而未设置下限。当构造的 大小表达到约 2 GiB 时，若 为 1（或在无头设备上报 返回零），会导致在 qdisc 锁保护下的 deficit-refill 循环陷入自旋。 在拒绝显式零值之后，以及在回退路径中，添加 以限制 quantum 的范围。显式拒绝零值的逻辑得以保留。 重现该漏洞的条件如下： 需要启用配置选项 。 需要具

AI Predicted 7.8 Difficulty: Easy EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 13d2a1d2b032de08d7dcab6a1edcd47802681f96< e2297bbf9cf6ece86f1d1f8c683517a994990f9e affected
13d2a1d2b032de08d7dcab6a1edcd47802681f96< 560794ee6e040b6e1c4ac2b3c8909f341a4596ee affected
13d2a1d2b032de08d7dcab6a1edcd47802681f96< 23fea7e6736b2e1c6f6f2f05cccf33d36834da73 affected
13d2a1d2b032de08d7dcab6a1edcd47802681f96< b464affe9f9dfe41ac48930c376e3fb8596651b0 affected
13d2a1d2b032de08d7dcab6a1edcd47802681f96< dc8b374214ef5bba4882bbd95b361e42555cfc0d affected
13d2a1d2b032de08d7dcab6a1edcd47802681f96< d43cded350fe1218493ad3d37a276aff14108ae6 affected
13d2a1d2b032de08d7dcab6a1edcd47802681f96< 8f756ae1c87414ce9cc21b30e6e4c036d6e9e80b affected
13d2a1d2b032de08d7dcab6a1edcd47802681f96< 8382abec0f1568d0a5590d75a3df92f23fcf5196 affected
… +10 more rows
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I. Basic Information for CVE-2026-98010

Vulnerability Information
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Vulnerability Title
net/sched: drr: clamp quantum in change class
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: drr: clamp quantum in change class drr_change_class() rejects explicit quantum==0 but falls back to psched_mtu() with no floor. With a crafted size table qdisc_pkt_len reaches ~2 GiB, so quantum=1 (or a zero psched_mtu on a headerless device) makes the deficit-refill loop spin under the qdisc lock. Add clamp_t(u32, quantum, 256, 1<<20) after the zero reject and on the fallback path. The explicit-zero reject is preserved. Conditions to recreate the bug: CONFIG_NET_SCH_DRR=y. Requires CAP_NET_ADMIN (namespace-local via unshare -Urn suffices). tc qdisc add dev dummy0 root drr tc class add dev dummy0 parent 1: classid 1:1 drr quantum 1
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 13d2a1d2b032de08d7dcab6a1edcd47802681f96 ~ e2297bbf9cf6ece86f1d1f8c683517a994990f9e -
Linux Linux 2.6.29 -

II. Public POCs for CVE-2026-98010

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III. Intelligence Information for CVE-2026-98010

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Patches & Fixes for CVE-2026-98010 (8)

Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total

CVE-2026-100075 9.8 CRITICAL RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters
CVE-2026-97555 8.8 HIGH smb: client: fix heap overflow in DACL owner/group rewrite
CVE-2026-97957 8.8 HIGH net: hinic: fix mailbox segment buffer overflow
CVE-2026-97527 8.8 HIGH scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock
CVE-2026-97528 8.8 HIGH scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error
CVE-2026-98115 8.8 HIGH ksmbd: safely drain sessions during logoff
CVE-2026-97525 8.2 HIGH x86/mm/pat: Allocate split page tables as kernel page tables
CVE-2026-98069 8.1 HIGH net/rds: acquire the fastpath locks in rds_conn_shutdown()
CVE-2026-97573 8.1 HIGH bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()
CVE-2026-97570 8.1 HIGH bnxt_en: Bound SW TPA IDs to prevent crashes
CVE-2026-98130 8.1 HIGH sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
CVE-2026-98070 8.1 HIGH net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
CVE-2026-98002 7.8 HIGH iommu/amd: Fix ineffective error check in nested domain allocation
CVE-2026-97575 7.8 HIGH media: v4l2-ctrls: validate AV1 tile counts
CVE-2026-97576 7.8 HIGH media: v4l2-ctrls: validate HEVC tile counts
CVE-2026-97941 7.8 HIGH mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race
CVE-2026-98112 7.8 HIGH ksmbd: fix listener task lifetime on netdev events
CVE-2026-97937 7.8 HIGH ftrace: fork: Initialize function graph state before copy_exec_state()
CVE-2026-97580 7.8 HIGH media: rkvdec: bound HEVC tile loops and PPS id to the array capacity
CVE-2026-97940 7.8 HIGH ipv6: fix fib6 walker UAF on seq stop

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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