VulnerabilityPublished 23 Oct 2026Updated 26 Oct 2026

CVE-2026-98906: Linux kernel · net: lan966x: restore RX state on reload failure

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in b5a6462f4646687c922931133a2478da94addc87 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · 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 b5a6462f4646687c922931133a2478da94addc87, aa97f11a76e545ed73cc455bcdd1ece4b480b507, 3883898ddc26308497dbba8068951ab5eddbd111

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.

What to do

Upgrade Linux kernel to b5a6462f4646687c922931133a2478da94addc87, aa97f11a76e545ed73cc455bcdd1ece4b480b507 or 3883898ddc26308497dbba8068951ab5eddbd111.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2ea1cbac267e2a39546982612fc00084b6d93e40, < b5a6462f4646687c922931133a2478da94addc87	Fixed in b5a6462f4646687c922931133a2478da94addc87
LinuxLinux	Affected ≥ 2ea1cbac267e2a39546982612fc00084b6d93e40, < aa97f11a76e545ed73cc455bcdd1ece4b480b507	Fixed in aa97f11a76e545ed73cc455bcdd1ece4b480b507
LinuxLinux	Affected ≥ 2ea1cbac267e2a39546982612fc00084b6d93e40, < 3883898ddc26308497dbba8068951ab5eddbd111	Fixed in 3883898ddc26308497dbba8068951ab5eddbd111
LinuxLinux	Affected =5.19	Fixed in–

AI-suggested

This vulnerability has been fixed in the Linux kernel commits identified by hashes b5a6462f4646687c922931133a2478da94addc87, aa97f11a76e545ed73cc455bcdd1ece4b480b507, and 3883898ddc26308497dbba8068951ab5eddbd111. Users should update to a Linux kernel version that includes these fixes. No additional mitigation is required.

Description

A vulnerability in the Linux kernel's lan966x network driver involves improper restoration of RX state after a reload failure. Specifically, certain fields related to RX page geometry and page pool registration are not restored correctly if resource reallocation fails, potentially causing inconsistencies in frame size handling in the XDP path. This issue has been fixed in specific Linux kernel commits.

Impact

If the RX state is not properly restored after a reload failure, the XDP path may advertise a frame size inconsistent with the actual RX pages, potentially leading to incorrect packet processing or dropped packets. This could affect network reliability or performance on affected systems using the lan966x driver with jumbo MTU configurations. There are no known exploits in the wild.

Summary

The lan966x_fdma_reload() function in the Linux kernel's lan966x network driver backs up RX state before reallocating RX resources for a new MTU. If the allocation fails, some fields (rx->page_order and rx->max_mtu) are not restored, leading to a mismatch between the advertised frame size and the actual RX pages. Additionally, the rollback path does not restore per-port XDP RXQ memory model registration after failure. This inconsistency can cause the XDP path to operate with incorrect frame size assumptions. The issue is resolved by saving and restoring these fields and the page pool registration before restarting RX.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 09:33 UTC

Technical details

References

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