VulnerabilityPublished 23 Oct 2026

CVE-2026-98948: Linux kernel · mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()

Source GCVE Database

Authoritative record:CVE-2026-98948

Not known to be exploited · fixed in c8e934287debb29c6ded86b21e49fc72e186d15e : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in c8e934287debb29c6ded86b21e49fc72e186d15e, 3938430f0237c59ca08d6a366e7657b2b7f8d0bb, 41ad5bcf0219aaebf8ffb052c5e8177479330cde +2

Exploitation evidence

Disclosed: evidence found.
CVE published 23 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-q8hc-4jgv-gvh5

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ fe22f7410527c2077223b5fd0fc0458db912f0db, < c8e934287debb29c6ded86b21e49fc72e186d15e	Fixed in c8e934287debb29c6ded86b21e49fc72e186d15e
LinuxLinux	Affected ≥ fe22f7410527c2077223b5fd0fc0458db912f0db, < 3938430f0237c59ca08d6a366e7657b2b7f8d0bb	Fixed in 3938430f0237c59ca08d6a366e7657b2b7f8d0bb
LinuxLinux	Affected ≥ fe22f7410527c2077223b5fd0fc0458db912f0db, < 41ad5bcf0219aaebf8ffb052c5e8177479330cde	Fixed in 41ad5bcf0219aaebf8ffb052c5e8177479330cde
LinuxLinux	Affected ≥ fe22f7410527c2077223b5fd0fc0458db912f0db, < 7ea07afb230f1342ab0f9365edd0aae137f425d3	Fixed in 7ea07afb230f1342ab0f9365edd0aae137f425d3
LinuxLinux	Affected ≥ fe22f7410527c2077223b5fd0fc0458db912f0db, < 4eaf1285b5c1e42f80e47f9fe0d391e70418db02	Fixed in 4eaf1285b5c1e42f80e47f9fe0d391e70418db02
LinuxLinux	Affected =6.6	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_flower: Fix port range register leak in tmplt_create() mlxsw_sp_flower_tmplt_create() parses a flow_cls_offload template into a stack-local struct mlxsw_sp_acl_rule_info purely to compute rulei.values.elusage. Parsing can acquire port range registers via mlxsw_sp_flower_parse_ports_range(), but since this rulei never goes through mlxsw_sp_acl_rulei_destroy(), those registers were never released, including through chain template deletion. Factor out of mlxsw_sp_acl_rulei_destroy() the code to actually release the necessary resources and call from mlxsw_sp_flower_tmplt_create() to plug the leak. The issue was found during a review of Wentao Liang's patch referenced below.

References

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