CVE-2026-98009net/sched: ets: clamp quantum in parse and fallback paths
- —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: ets: clamp quantum in parse and fallback paths ets_qdisc_change() falls back to psched_mtu() with no floor for bands without an explicit quantum. With a crafted size table qdisc_pkt_len reaches ~2 GiB, so a zero psched_mtu on a headerless device makes the deficit-refill loop spin under the qdisc lock. Move the floor into ets_quantum_parse() so explicitly configured quanta are also clamped to [256, 1<<20], not just the fallback path. Conditions to recreate the bug: CONFIG_NET_SCH_ETS=y. Requires CAP_NET_ADMIN (namespace-local via unshare -Urn suffices). tc qdisc add dev dummy0 root ets bands 3 strict 2 quanta 1 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 (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < 440b66cc7b56ea38e9b878ae88da91992efaa4c4
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < 4ef8664eafafc8db68a1d52601f17dc008a223b7
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < 8b8d782c3b96376217087767dcf662cd3d25f226
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < 226d2702e74a570f5bfae6115b4706da4b94e5cf
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < 99ae477b892e203a37985ebc56f0063e072f7f4b
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < 8f80b113dea0bed3c1a31a4224b72775cd9ec52d
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < de22c30ec5598aca8797f02082d2ee1358dfa3ff
- affected dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 – < 1c38487f46b243bfeefec0c0c86023a3904f2214
- affected 5.6
- unaffected < 5.6
- 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/440b66cc7b56ea38e9b878ae88da91992efaa4c4 (opens in a new tab)
- https://git.kernel.org/stable/c/4ef8664eafafc8db68a1d52601f17dc008a223b7 (opens in a new tab)
- https://git.kernel.org/stable/c/8b8d782c3b96376217087767dcf662cd3d25f226 (opens in a new tab)
- https://git.kernel.org/stable/c/226d2702e74a570f5bfae6115b4706da4b94e5cf (opens in a new tab)
- https://git.kernel.org/stable/c/99ae477b892e203a37985ebc56f0063e072f7f4b (opens in a new tab)
- https://git.kernel.org/stable/c/8f80b113dea0bed3c1a31a4224b72775cd9ec52d (opens in a new tab)
- https://git.kernel.org/stable/c/de22c30ec5598aca8797f02082d2ee1358dfa3ff (opens in a new tab)
- https://git.kernel.org/stable/c/1c38487f46b243bfeefec0c0c86023a3904f2214 (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-2026-86662 (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-2026-98009)Record last updated .