VulnerabilityPublished 18 Oct 2026

CVE-2026-98567: Linux kernel · net: xps: reject an out of range traffic class

Source GCVE Database

Authoritative record:CVE-2026-98567· High

Not known to be exploited · fixed in eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f : patch Linux kernel soon.

Data as of 26 Oct 2026, 17:16 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f, 930318290d8509e864c015fe6c9239470b3c579c, 967e10f40a0c6732db299cbe001df0e859196055 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-hhgw-8m99-q94g

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 184c449f91fef521042970cca46bd5cdfc0e3a37, < eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f	Fixed in eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f
LinuxLinux	Affected ≥ 184c449f91fef521042970cca46bd5cdfc0e3a37, < 930318290d8509e864c015fe6c9239470b3c579c	Fixed in 930318290d8509e864c015fe6c9239470b3c579c
LinuxLinux	Affected ≥ 184c449f91fef521042970cca46bd5cdfc0e3a37, < 967e10f40a0c6732db299cbe001df0e859196055	Fixed in 967e10f40a0c6732db299cbe001df0e859196055
LinuxLinux	Affected ≥ 184c449f91fef521042970cca46bd5cdfc0e3a37, < 9e841723ba482d41ecbf90241c756a16cdfea949	Fixed in 9e841723ba482d41ecbf90241c756a16cdfea949
LinuxLinux	Affected ≥ 184c449f91fef521042970cca46bd5cdfc0e3a37, < 6ea8f643053f33622f9116e4e1db58306ece45e3	Fixed in 6ea8f643053f33622f9116e4e1db58306ece45e3
LinuxLinux	Affected ≥ 184c449f91fef521042970cca46bd5cdfc0e3a37, < 4da3b7b8b50f3e2fde54a4c18a82a8e3f6223910	Fixed in 4da3b7b8b50f3e2fde54a4c18a82a8e3f6223910

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available that rejects traffic classes that exceed the allocated map size, preventing out-of-bounds writes. Users should apply the official Linux kernel patch that addresses this issue. Until patched, avoid configurations that reduce num_tc without properly resetting traffic class mappings.

Description

A vulnerability in the Linux kernel's network subsystem (net: xps) allows an out-of-range traffic class to be used, causing a write beyond the bounds of an allocated map. This occurs when the number of traffic classes (num_tc) is lowered without clearing related arrays, leading to an out-of-bounds write in __netif_set_xps_queue(). The issue has been resolved by rejecting traffic classes that exceed the map's capacity.

References

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