net: bcmasp: clear txcb->last before writing each descriptor (CVE-2026-98052) | HOL Guard CVE

High · CVSS 7.8CVE-2026-98052

net: bcmasp: clear txcb->last before writing each descriptor

Answer in brief

CVE-2026-98052 records a High severity (CVSS 7.8) vulnerability in net: bcmasp: clear txcb->last before writing each descriptor. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=490cb412007de593e07c1d3e2b1ec4233886707c <9b26b54861ce05307d39a54ddedddf8747419614 \|\| >=490cb412007de593e07c1d3e2b1ec4233886707c <47a5cecca925ceb175d5adf712e667acf78f475f \|\| >=490cb412007de593e07c1d3e2b1ec4233886707c <17e6ad484dea5ddf1c4a3d6ec77a5929161234de \|\| >=490cb412007de593e07c1d3e2b1ec4233886707c <18e5e0ec0e9282c897e2aa81a3e43ccaee03b003	9b26b54861ce05307d39a54ddedddf8747419614, 47a5cecca925ceb175d5adf712e667acf78f475f, 17e6ad484dea5ddf1c4a3d6ec77a5929161234de, 18e5e0ec0e9282c897e2aa81a3e43ccaee03b003
Linux/Linuxgeneric	6.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 9b26b54861ce05307d39a54ddedddf8747419614 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net: bcmasp: clear txcb->last before writing each descriptor bcmasp_xmit() only wrote txcb->last = true for the final fragment of an SKB; non-final fragments left the field untouched. If a descriptor slot was reused while it still held a stale true from a previous SKB (possible when tx_spb_ring_full() underreported fullness), bcmasp_tx_reclaim() would see last == true mid-SKB and call dev_consume_skb_any() prematurely, freeing the sk_buff while its remaining fragments were still in flight. Unconditionally clear txcb->last before the conditional set so every descriptor slot starts from a known false state regardless of what a prior transmission left behind.

Quoted source text, attributed separately from HOL analysis.