CVE-2026-98052

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

State
Published
Severity
7.8 High
Published
Sep 25, 2026
Updated
Oct 19, 2026
Reserved
Sep 25, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 490cb412007de593e07c1d3e2b1ec4233886707c to before 1e213ba7cb3b9dd97ac2e0a1054e6d0d1d91f5bcAffected
  • 490cb412007de593e07c1d3e2b1ec4233886707c to before 9b26b54861ce05307d39a54ddedddf8747419614Affected
  • 490cb412007de593e07c1d3e2b1ec4233886707c to before 47a5cecca925ceb175d5adf712e667acf78f475fAffected
  • 490cb412007de593e07c1d3e2b1ec4233886707c to before 17e6ad484dea5ddf1c4a3d6ec77a5929161234deAffected
  • 490cb412007de593e07c1d3e2b1ec4233886707c to before 18e5e0ec0e9282c897e2aa81a3e43ccaee03b003Affected
LinuxLinux
  • 6.6Affected
  • before 6.6Not affected
  • 6.6.158 through 6.6.*Not affected
  • 6.12.111 through 6.12.*Not affected
  • 6.18.53 through 6.18.*Not affected
  • 7.2.7 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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