VulnerabilityPublished 18 Oct 2026

CVE-2026-98489: Linux kernel · net: atl1c: fix soft lockup on out-of-range tpd_cons read

Source GCVE Database

Authoritative record:CVE-2026-98489· Medium

Not known to be exploited · fixed in e7acd4cdeccbcdfd407adeb72b1eba14d1145b6f : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e7acd4cdeccbcdfd407adeb72b1eba14d1145b6f, d4ab263e40fcf7cfa38a43ec774067d32eb94e16, 586847400b1168a88917287ac02c2c91a620b841 +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-v9fj-6g8j-jj53

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 43250ddd75a35d1f7926d989a10fefd30c37eaa7, < e7acd4cdeccbcdfd407adeb72b1eba14d1145b6f	Fixed in e7acd4cdeccbcdfd407adeb72b1eba14d1145b6f
LinuxLinux	Affected ≥ 43250ddd75a35d1f7926d989a10fefd30c37eaa7, < d4ab263e40fcf7cfa38a43ec774067d32eb94e16	Fixed in d4ab263e40fcf7cfa38a43ec774067d32eb94e16
LinuxLinux	Affected ≥ 43250ddd75a35d1f7926d989a10fefd30c37eaa7, < 586847400b1168a88917287ac02c2c91a620b841	Fixed in 586847400b1168a88917287ac02c2c91a620b841
LinuxLinux	Affected ≥ 43250ddd75a35d1f7926d989a10fefd30c37eaa7, < 57b55367b6e3accc55a989afeaf127063e3614dc	Fixed in 57b55367b6e3accc55a989afeaf127063e3614dc
LinuxLinux	Affected ≥ 43250ddd75a35d1f7926d989a10fefd30c37eaa7, < 36c2009d90f2210ef92e6f4f2850e8b57b09e754	Fixed in 36c2009d90f2210ef92e6f4f2850e8b57b09e754
LinuxLinux	Affected ≥ 43250ddd75a35d1f7926d989a10fefd30c37eaa7, < 9f2cc71a2e2799d9c993c73f1bd36507eef6ae43	Fixed in 9f2cc71a2e2799d9c993c73f1bd36507eef6ae43

AI-suggested

A fix has been implemented in the Linux kernel to handle the out-of-range tpd_cons value properly by treating it as "nothing new to clean" to prevent the infinite loop and soft lockup. Users should update their Linux kernel to a version that includes this fix. Since this is a kernel driver issue, applying the official kernel update is the recommended remediation.

Description

A vulnerability in the Linux kernel's atl1c network driver caused a soft lockup due to an out-of-range tpd_cons read. The hardware can report an invalid tpd_cons value (0xffff) during PCIe link or MAC reset, causing an infinite loop and CPU soft lockup. This issue was reproduced on systems using Qualcomm Atheros AR8151 v2.0 NICs, triggered by rebooting a Mikrotik CCR2004 PCIe card. The problem manifests as a transmit queue timeout and a stuck CPU thread in the atl1c_clean_tx function.

References

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