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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98052
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:34 UTC
Updated2026-09-25 15:18:05 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 490cb412007de593e07c1d3e2b1ec4233886707c 9b26b54861ce05307d39a54ddedddf8747419614 git Not specified
CNA Linux Linux affected 490cb412007de593e07c1d3e2b1ec4233886707c 47a5cecca925ceb175d5adf712e667acf78f475f git Not specified
CNA Linux Linux affected 490cb412007de593e07c1d3e2b1ec4233886707c 17e6ad484dea5ddf1c4a3d6ec77a5929161234de git Not specified
CNA Linux Linux affected 490cb412007de593e07c1d3e2b1ec4233886707c 18e5e0ec0e9282c897e2aa81a3e43ccaee03b003 git Not specified
CNA Linux Linux affected 6.6 Not specified
CNA Linux Linux unaffected 6.6 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/18e5e0ec0e9282c897e2aa81a3e43ccaee03b003 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/17e6ad484dea5ddf1c4a3d6ec77a5929161234de 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9b26b54861ce05307d39a54ddedddf8747419614 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/47a5cecca925ceb175d5adf712e667acf78f475f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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