CVE-2026-98052

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

HIGH
7.8
CVSS Score
Published: September 25, 2026 at 10:24 AM UTC
Updated: October 19, 2026 at 10:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.13 ≤ v < 6.18.536.19 ≤ v < 7.2.76.6 ≤ v < 6.6.1586.7 ≤ v < 6.12.111490cb412007de593e07c1d3e2b1ec4233886707c7.37.3 rc17.3 rc2
Vendor states this is fixed in 17e6ad484dea5ddf1c4a3d6ec77a5929161234de (fixed)
Vendor states this is fixed in 18e5e0ec0e9282c897e2aa81a3e43ccaee03b003 (fixed)
Vendor states this is fixed in 1e213ba7cb3b9dd97ac2e0a1054e6d0d1d91f5bc (fixed)
Vendor states this is fixed in 47a5cecca925ceb175d5adf712e667acf78f475f (fixed)
Vendor states this is fixed in 9b26b54861ce05307d39a54ddedddf8747419614 (fixed)
Vendor states this is fixed in 6.12.111 (unaffected)
Vendor states this is fixed in 6.18.53 (unaffected)
Vendor states this is fixed in 6.6 (unaffected)
Vendor states this is fixed in 6.6.158 (unaffected)
Vendor states this is fixed in 7.2.7 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc3 (unaffected)

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusANALYZED
CWE
NVD-CWE-Other

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