CVE-2026-98052Hinoki check available

Premature buffer free via stale descriptor state

Published Sep 25, 2026 · Updated Sep 25, 2026

Use-after-free in affected Linux kernels beginning with 6.6 allows attackers to trigger premature buffer freeing during transmission. bcmasp_xmit leaves the last flag unchanged on reused non-final descriptors, causing bcmasp_tx_reclaim to consume an sk_buff while later fragments remain in flight. The condition requires the Broadcom ASP2 Ethernet driver, fragmented transmission, stale descriptor state, and an undercounted full ring; the public record does not establish a remote trigger.

CVSS severityUnavailable
Unscored
EPSS probability0.13%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in affected Linux kernels beginning with 6.6 allows attackers to trigger premature buffer freeing during transmission. bcmasp_xmit leaves the last flag unchanged on reused non-final descriptors, causing bcmasp_tx_reclaim to consume an sk_buff while later fragments remain in flight. The condition requires the Broadcom ASP2 Ethernet driver, fragmented transmission, stale descriptor state, and an undercounted full ring; the public record does not establish a remote trigger.

The record

CVE
CVE-2026-98052
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=490cb412007de593e07c1d3e2b1ec4233886707c <17e6ad484dea5ddf1c4a3d6ec77a5929161234de
  2. Affected versionversion=490cb412007de593e07c1d3e2b1ec4233886707c <18e5e0ec0e9282c897e2aa81a3e43ccaee03b003
  3. Affected versionversion=490cb412007de593e07c1d3e2b1ec4233886707c <47a5cecca925ceb175d5adf712e667acf78f475f
  4. Affected versionversion=490cb412007de593e07c1d3e2b1ec4233886707c <9b26b54861ce05307d39a54ddedddf8747419614
  5. Affected versionversion=6.6

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=490cb412007de593e07c1d3e2b1ec4233886707c <17e6ad484dea5ddf1c4a3d6ec77a5929161234de; version=490cb412007de593e07c1d3e2b1ec4233886707c <18e5e0ec0e9282c897e2aa81a3e43ccaee03b003; version=490cb412007de593e07c1d3e2b1ec4233886707c <47a5cecca925ceb175d5adf712e667acf78f475f; version=490cb412007de593e07c1d3e2b1ec4233886707c <9b26b54861ce05307d39a54ddedddf8747419614; version=6.6

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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