CVE-2026-46300— net: skbuff 共享碎片标记传播漏洞
已观察到在野利用 github_trending · low
可能的 ATT&CK 技术 1AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | cef401de7be8c4e155c6746bfccf721a4fa5fab9< 3599e6b3cc1ada96883d496a50a210d3afbb6987 | affected |
cef401de7be8c4e155c6746bfccf721a4fa5fab9< 2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c | affected | ||
cef401de7be8c4e155c6746bfccf721a4fa5fab9< 9d3e5fd19fe1063bf607219e8562fbd567b8e8d5 | affected | ||
cef401de7be8c4e155c6746bfccf721a4fa5fab9< 78bf6b6bb19541d19fbda6242e7cfe2c682763c0 | affected | ||
cef401de7be8c4e155c6746bfccf721a4fa5fab9< 760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e | affected | ||
cef401de7be8c4e155c6746bfccf721a4fa5fab9< 3bd9e113d50034db99d7ef69fd8e5242d15e414a | affected | ||
cef401de7be8c4e155c6746bfccf721a4fa5fab9< 3884358a9286b17f389a72b1426fc4547c23c111 | affected | ||
3.9 | affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2026-46300 基础信息
漏洞信息
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Vulnerability Title
net: skbuff: preserve shared-frag marker during coalescing
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.
来源: 美国国家漏洞数据库 NVD
CVSS Information
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
N/A
来源: 美国国家漏洞数据库 NVD
受影响产品
二、漏洞 CVE-2026-46300 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-46300 补丁与修复 (14)
IV. Related Vulnerabilities
V. Comments for CVE-2026-46300
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