CVE-2026-98010
CVE CVE-2026-98010EUVD EUVD-2026-86663Published 2026-09-25T10:23:34.000Z
What the advisory describes
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: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 13d2a1d2b032de08d7dcab6a1edcd47802681f96 <dc8b374214ef5bba4882bbd95b361e42555cfc0d; patch: 7.2.7; patch: 7.3-rc3; patch: 6.18.53; patch: 6.12.111; 13d2a1d2b032de08d7dcab6a1edcd47802681f96 <8382abec0f1568d0a5590d75a3df92f23fcf5196; 13d2a1d2b032de08d7dcab6a1edcd47802681f96 <d43cded350fe1218493ad3d37a276aff14108ae6; 13d2a1d2b032de08d7dcab6a1edcd47802681f96 <8f756ae1c87414ce9cc21b30e6e4c036d6e9e80b; 2.6.29; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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