CVE-2026-53300— 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基金会开源的操作系统Linux所使用的内核。 Linux kernel 6.16之前版本存在安全漏洞，该漏洞源于NTMP DMA释放后重用问题，可能导致内存损坏。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 4701073c3debd16d7f534f3eb808bd9b50601c0c< 37c8933064be714ee672b0a0523c2fd045b73b3d |
affected |
4701073c3debd16d7f534f3eb808bd9b50601c0c< 655d9ce9b1d3db0aa5271acb5e5101c66bd0d58b |
affected | ||
4701073c3debd16d7f534f3eb808bd9b50601c0c< 3cade698881eb238f88cbbfec82acc2110440a3f |
affected | ||
6.16 |
affected | ||
< 6.16 |
unaffected | ||
6.18.33≤ 6.18.* |
unaffected | ||
7.0.10≤ 7.0.* |
unaffected | ||
7.1≤ * |
unaffected |
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-53300 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
net: enetc: fix NTMP DMA use-after-free issue
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: enetc: fix NTMP DMA use-after-free issue
The AI-generated review reported a potential DMA use-after-free issue
[1]. If netc_xmit_ntmp_cmd() times out and returns an error, the pending
command is not explicitly aborted, while ntmp_free_data_mem()
unconditionally frees the DMA buffer. If the buffer has already been
reallocated elsewhere, this may lead to silent memory corruption. Because
the hardware eventually processes the pending command and perform a DMA
write of the response to the physical address of the freed buffer.
To resolve this issue, this patch does the following modifications:
1. Convert cbdr->ring_lock from a spinlock to a mutex
The lock was originally a spinlock in case NTMP operations might be
invoked from atomic context. After downstream support for all NTMP
tables, no such usage has materialized. A mutex lock is now required
because the driver now needs to reclaim used BDs and release associated
DMA memory within the lock's context, while dma_free_coherent() might
sleep.
2. Introduce software command BD (struct netc_swcbd)
The hardware write-back overwrites the addr and len fields of the BD,
so the driver cannot rely on the hardware BD to free the associated DMA
memory. The driver now maintains a software shadow BD storing the DMA
buffer pointer, DMA address, and size. And netc_xmit_ntmp_cmd() only
reclaims older BDs when the number of used BDs reaches
NETC_CBDR_CLEAN_WORK (16). The software BD enables correct DMA memory
release. With this, struct ntmp_dma_buf and ntmp_free_data_mem() are no
longer needed and are removed.
3. Require callers to hold ring_lock across netc_xmit_ntmp_cmd()
netc_xmit_ntmp_cmd() releases the ring_lock before the caller finishes
consuming the response. At this point, if a concurrent thread submits
a new command, it may trigger ntmp_clean_cbdr() and free the DMA buffer
while it is still in use. Move ring_lock ownership to the caller to
ensure the response buffer cannot be reclaimed prematurely. So the
helpers ntmp_select_and_lock_cbdr() and ntmp_unlock_cbdr() are added.
These changes eliminate the DMA use-after-free condition and ensure safe
and consistent BD reclamation and DMA buffer lifecycle management.
来源: 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
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 6.16之前版本存在安全漏洞，该漏洞源于NTMP DMA释放后重用问题，可能导致内存损坏。
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-2026-53300 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-53300 的情报信息
请登录查看更多情报信息。
CVE-2026-53300 补丁与修复 (3)
同批安全公告 · Linux · 2026-06-26 · 共 47 条
| CVE-2026-53309 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53281 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53322 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53290 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53284 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53324 | Linux kernel 安全漏洞 | |
| CVE-2026-53304 | Linux kernel 安全漏洞 | |
| CVE-2026-53319 | Linux kernel 安全漏洞 | |
| CVE-2026-53321 | Linux kernel 安全漏洞 | |
| CVE-2026-53320 | Linux kernel 安全漏洞 | |
| CVE-2026-53323 | Linux kernel 安全漏洞 | |
| CVE-2026-53313 | Linux kernel 安全漏洞 | |
| CVE-2026-53312 | Linux kernel 安全漏洞 | |
| CVE-2026-53311 | Linux kernel 安全漏洞 | |
| CVE-2026-53310 | Linux kernel 安全漏洞 | |
| CVE-2026-53308 | Linux kernel 安全漏洞 | |
| CVE-2026-53307 | Linux kernel 安全漏洞 | |
| CVE-2026-53305 | Linux kernel 安全漏洞 | |
| CVE-2026-53306 | Linux kernel 安全漏洞 | |
| CVE-2026-53303 | Linux kernel 安全漏洞 |
显示前 20 条，共 47 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-53300
暂无评论