CVE-2026-98052— net: bcmasp: clear txcb->last before writing each descriptor
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Linux 内核中，以下漏洞已得到修复： net: bcmasp: 在写入每个描述符之前，先清除 txcb->last 字段 bcmasp_xmit() 函数仅对 SKB（套接字缓冲区）的最后一个分片设置 txcb->last = true，而非最后分片的处理会保持该字段不变。如果某个描述符槽位被复用时，其中仍然残留着上一个 SKB 遗留的陈旧 true 值（这种情况在 tx_spb_ring_full() 未能准确报告环满状态时可能发生），那么 bcmasp_tx_reclaim() 会在 SKB 传输过程中
Affected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 490cb412007de593e07c1d3e2b1ec4233886707c< 9b26b54861ce05307d39a54ddedddf8747419614 |
affected |
490cb412007de593e07c1d3e2b1ec4233886707c< 47a5cecca925ceb175d5adf712e667acf78f475f |
affected | ||
490cb412007de593e07c1d3e2b1ec4233886707c< 17e6ad484dea5ddf1c4a3d6ec77a5929161234de |
affected | ||
490cb412007de593e07c1d3e2b1ec4233886707c< 18e5e0ec0e9282c897e2aa81a3e43ccaee03b003 |
affected | ||
6.6 |
affected | ||
< 6.6 |
unaffected | ||
6.12.111≤ 6.12.* |
unaffected | ||
6.18.53≤ 6.18.* |
unaffected | ||
| … +2 more rows | |||
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I. Basic Information for CVE-2026-98052
Vulnerability Information
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Vulnerability Title
net: bcmasp: clear txcb->last before writing each descriptor
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-98052
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-98052 (4)
Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters |
| CVE-2026-97555 | 8.8 HIGH | smb: client: fix heap overflow in DACL owner/group rewrite |
| CVE-2026-97957 | 8.8 HIGH | net: hinic: fix mailbox segment buffer overflow |
| CVE-2026-97527 | 8.8 HIGH | scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock |
| CVE-2026-97528 | 8.8 HIGH | scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error |
| CVE-2026-98115 | 8.8 HIGH | ksmbd: safely drain sessions during logoff |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat: Allocate split page tables as kernel page tables |
| CVE-2026-98069 | 8.1 HIGH | net/rds: acquire the fastpath locks in rds_conn_shutdown() |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset() |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: Bound SW TPA IDs to prevent crashes |
| CVE-2026-98130 | 8.1 HIGH | sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START |
| CVE-2026-98070 | 8.1 HIGH | net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks() |
| CVE-2026-97576 | 7.8 HIGH | media: v4l2-ctrls: validate HEVC tile counts |
| CVE-2026-97578 | 7.8 HIGH | media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer |
| CVE-2026-98112 | 7.8 HIGH | ksmbd: fix listener task lifetime on netdev events |
| CVE-2026-98002 | 7.8 HIGH | iommu/amd: Fix ineffective error check in nested domain allocation |
| CVE-2026-98116 | 7.8 HIGH | ALSA: pcm: Serialize PCM mmap with buffer reallocation to fix page UAF |
| CVE-2026-97941 | 7.8 HIGH | mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race |
| CVE-2026-97940 | 7.8 HIGH | ipv6: fix fib6 walker UAF on seq stop |
| CVE-2026-98122 | 7.8 HIGH | vxlan: mdb: Fix use-after-free in vxlan_mdb_remote_src_del() |
Showing top 20 of 372 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
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CVE-2026-98163
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CVE-2026-98162
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CVE-2026-98161
nvdimm: pmem: keep PREFLUSH before data writes -
CVE-2026-98160
staging: rtl8723bs: fix mismatched free of HalData in rtw_sd -
CVE-2026-100079
usb: typec: ucsi: unregister debugfs entries on teardown
Same vendor: Linux
-
CVE-2026-98163
cgroup: Avoid iteration of dying tasks with zero refcount -
CVE-2026-98162
smb/server: fix tree connection leak in smb2_tree_connect() -
CVE-2026-98161
nvdimm: pmem: keep PREFLUSH before data writes -
CVE-2026-98160
staging: rtl8723bs: fix mismatched free of HalData in rtw_sd -
CVE-2026-100079
usb: typec: ucsi: unregister debugfs entries on teardown
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