CVE-2026-72046— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 6.9版本存在安全漏洞，该漏洞源于gve驱动在启用header-split和HW-GRO时按队列位置而非缓冲区身份索引header buffer，可能导致header buffer损坏，造成网络吞吐量下降和TCP重传。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 5e37d8254e7f551dda62e7590e819d69c7491845< 84d3753d4bf284ef770ead6dee2270aaabb3ef41 |
affected |
5e37d8254e7f551dda62e7590e819d69c7491845< 35267819b25074084130b6a7be18bbaf44d3ae74 |
affected | ||
5e37d8254e7f551dda62e7590e819d69c7491845< 9f8e7f59b0c2f466be74bd923726b0f5496c27ad |
affected | ||
5e37d8254e7f551dda62e7590e819d69c7491845< d676c9a73bdcd8237425dbb826f2bd1a25c36e40 |
affected | ||
6.9 |
affected | ||
< 6.9 |
unaffected | ||
6.12.101≤ 6.12.* |
unaffected | ||
6.18.40≤ 6.18.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2026-72046 基础信息
漏洞信息
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Vulnerability Title
gve: fix header buffer corruption with header-split and HW-GRO
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
gve: fix header buffer corruption with header-split and HW-GRO
The DQO RX datapath programs a per-buffer-queue-descriptor
header_buf_addr at post time and reads the split header back at
completion time. Both the post and the read currently index the
header buffer by queue position rather than by the buffer's identity:
- post (gve_rx_post_buffers_dqo): header_buf_addr is computed from
bufq->tail
- read (gve_rx_dqo): the header is read from desc_idx (the completion
queue head index)
This relies on the buffer-queue index and the completion-queue index
being equal for the start of every packet, i.e. on the device consuming
posted buffers and returning completions in the exact same order. That
assumption does not hold once HW-GRO is enabled with multiple
flows: coalesced segments are accepted and completed in an order that
may differ from the order buffers were posted, and segments from
different flows may interleave.
That results in two problems:
1. Wrong header slot on read. Because the read offset is derived from
the completion index (desc_idx) while the device wrote the header to
the address programmed for the buffer's buf_id, the driver can copy
a header belonging to a different packet. This shows up as
throughput drop (about 30% drop and large numbers of TCP
retransmissions) with header-split and HW-GRO both enabled and many
streams.
2. Header buffer reused while still owned by the device. The driver
advances bufq->head by one per completion and re-posts buffers based
on that. Arrival of N RX completions only guarantees that at least N
RX buffer descriptors have been read by the device. It does not
guarantee that the device has relinquished the ownership of all the
buffers corresponding to those N descriptors. With out-of-order
completions (e.g. the completion for a packet copied into buffer N
arrives before the completion for a packet copied into buffer N-1),
the driver can re-post and overwrite a header buffer that the device
is still going to write into, corrupting the header of a packet
whose completion has not yet been processed.
Fix both issues by indexing the header buffer by buf_id on both the post
and read paths. Reading from buf_id's slot is therefore always correct
regardless of completion ordering (fixes problem 1).
Indexing by buf_id also ties each header slot to the lifetime of its
buffer state. A buffer state is only returned to the free/recycle lists
when its own completion (buf_id) is processed, so its header slot can
only be re-posted after the device is done with it. This makes header
slot reuse safe under out-of-order completions (fixes problem 2).
Allocate (gve_rx_alloc_hdr_bufs) and free (gve_rx_free_hdr_bufs) the
header buffers based on num_buf_states to match the buf_id indexing.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 6.9版本存在安全漏洞，该漏洞源于gve驱动在启用header-split和HW-GRO时按队列位置而非缓冲区身份索引header buffer，可能导致header buffer损坏，造成网络吞吐量下降和TCP重传。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-72046 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-72046 补丁与修复 (4)
同批安全公告 · Linux · 2026-08-15 · 共 844 条
| CVE-2026-74280 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74475 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72421 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74279 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72408 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72407 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74309 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72493 | 9.9 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72098 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72393 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72366 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72355 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72351 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72339 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72130 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74428 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72317 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72319 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72322 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 844 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-72046
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