VulnerabilityPublished 25 Sep 2026Updated 19 Oct 2026

CVE-2026-98051: Linux kernel · net: bcmasp: fix tx_spb_ring_full() checking same slot cnt times

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f7f7a16dd46ace4e221336a184c7806f7de19547 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f7f7a16dd46ace4e221336a184c7806f7de19547, a8bddab54aa68b407f12294acb05bd552fb6a492, 990df1ba4d0805d1e7f6148c364febd2ab618766 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Sep 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 490cb412007de593e07c1d3e2b1ec4233886707c, < f7f7a16dd46ace4e221336a184c7806f7de19547	Fixed in f7f7a16dd46ace4e221336a184c7806f7de19547
LinuxLinux	Affected ≥ 490cb412007de593e07c1d3e2b1ec4233886707c, < a8bddab54aa68b407f12294acb05bd552fb6a492	Fixed in a8bddab54aa68b407f12294acb05bd552fb6a492
LinuxLinux	Affected ≥ 490cb412007de593e07c1d3e2b1ec4233886707c, < 990df1ba4d0805d1e7f6148c364febd2ab618766	Fixed in 990df1ba4d0805d1e7f6148c364febd2ab618766
LinuxLinux	Affected ≥ 490cb412007de593e07c1d3e2b1ec4233886707c, < 5df7ecd302488287665ab9767bacba7ed7e2842f	Fixed in 5df7ecd302488287665ab9767bacba7ed7e2842f
LinuxLinux	Affected ≥ 490cb412007de593e07c1d3e2b1ec4233886707c, < 0c5cf62e72d7a666ee4da757e122dc1600df1ecc	Fixed in 0c5cf62e72d7a666ee4da757e122dc1600df1ecc
LinuxLinux	Affected =6.6	Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel versions identified by the provided commit hashes. Users should update to these fixed versions to remediate the issue.

Description

A vulnerability in the Linux kernel's bcmasp network driver was fixed by correcting the tx_spb_ring_full() function. The function previously checked the same descriptor slot multiple times due to incorrect loop initialization, causing it to fail to verify the availability of multiple consecutive slots needed for transmission. This flaw could lead to improper transmission handling.

Impact

This vulnerability could cause the network driver to incorrectly assess buffer availability for transmissions, potentially leading to transmission errors or dropped packets. The exact impact on system stability or security is not detailed in the provided data.

Summary

The Linux kernel's bcmasp driver contained a flaw in the tx_spb_ring_full() function where the loop reinitialized the next_index variable on every iteration, causing the function to check the same slot repeatedly rather than advancing through consecutive slots. This prevented proper verification that a specified number of consecutive descriptor slots were free before allowing a new transmission. The fix involved moving the initialization of next_index outside the loop so that each iteration correctly advances the index, ensuring accurate slot availability checks.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 12:53 UTC

Technical details

References

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