CVE-2026-98010net/sched: drr: clamp quantum in change class
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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
Timeline
ID reserved
By Linux
Published
- 24 days later
· 24 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < e2297bbf9cf6ece86f1d1f8c683517a994990f9e
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < 560794ee6e040b6e1c4ac2b3c8909f341a4596ee
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < 23fea7e6736b2e1c6f6f2f05cccf33d36834da73
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < b464affe9f9dfe41ac48930c376e3fb8596651b0
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < dc8b374214ef5bba4882bbd95b361e42555cfc0d
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < d43cded350fe1218493ad3d37a276aff14108ae6
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < 8f756ae1c87414ce9cc21b30e6e4c036d6e9e80b
- affected 13d2a1d2b032de08d7dcab6a1edcd47802681f96 – < 8382abec0f1568d0a5590d75a3df92f23fcf5196
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/e2297bbf9cf6ece86f1d1f8c683517a994990f9e (opens in a new tab)
- https://git.kernel.org/stable/c/560794ee6e040b6e1c4ac2b3c8909f341a4596ee (opens in a new tab)
- https://git.kernel.org/stable/c/23fea7e6736b2e1c6f6f2f05cccf33d36834da73 (opens in a new tab)
- https://git.kernel.org/stable/c/b464affe9f9dfe41ac48930c376e3fb8596651b0 (opens in a new tab)
- https://git.kernel.org/stable/c/dc8b374214ef5bba4882bbd95b361e42555cfc0d (opens in a new tab)
- https://git.kernel.org/stable/c/d43cded350fe1218493ad3d37a276aff14108ae6 (opens in a new tab)
- https://git.kernel.org/stable/c/8f756ae1c87414ce9cc21b30e6e4c036d6e9e80b (opens in a new tab)
- https://git.kernel.org/stable/c/8382abec0f1568d0a5590d75a3df92f23fcf5196 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86663 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98010)Record last updated .