CVE-2026-63941— 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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ZCR_EL2寄存器处理不当，可能导致L2客户机访问不应有的向量长度。以下版本受到影响：6.11版本。
可能的 ATT&CK 技术 1 AI
T1498 · Network Denial of Service影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | b3d29a8230998b36afecf494b199211d26052785< 2090c1a2368339eab0e14dcde12fdf6a5ea6359d |
affected |
b3d29a8230998b36afecf494b199211d26052785< 742a9b5ccd8c46caf983ca90c94f855466968e34 |
affected | ||
b3d29a8230998b36afecf494b199211d26052785< 83726330748981372bde86ed5411d7b306612991 |
affected | ||
6.11 |
affected | ||
< 6.11 |
unaffected | ||
6.18.57≤ 6.18.* |
unaffected | ||
7.0.12≤ 7.0.* |
unaffected | ||
7.1≤ * |
unaffected |
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一、 漏洞 CVE-2026-63941 基础信息
漏洞信息
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Vulnerability Title
KVM: arm64: Correctly cap ZCR_EL2 provided by a guest hypervisor
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: Correctly cap ZCR_EL2 provided by a guest hypervisor
ZCR_EL2 can be updated by a VHE guest hypervisor either using ZCR_EL2
(which traps) or ZCR_EL1 (which does not trap). KVM handles both in
different way:
- on ZCR_EL2 trap, ZCR_EL2.LEN is immediately capped at the VM's own
VL limit. This has the potential to break existing SW that relies
on the full LEN field to be stateful.
- on ZCR_EL1 access, we do absolutely nothing.
On restoring the SVE context for an L2 guest, we directly restore the
guest hypervisor's view of ZCR_EL2 into the physical ZCR_EL2. If the
guest's view of the register was updated using the ZCR_EL2 accessor,
the value has already been sanitised (with the caveat mentioned above).
But if the guest used ZCR_EL1, the raw value is written into the HW,
and the L2 guest can now access VLs that it shouldn't.
Fix all the above by moving the VL capping to the restore points,
ensuring that:
- the HW is always programmed with a capped value, irrespective of
the accessor being used,
- the ZCR_EL2.LEN field is always completely stateful, irrespective
of the accessor being used.
Additionally, move ZCR_EL2 to be a sanitised register, ensuring that
only the LEN field is actually stateful. This requires some creative
construction of the RES0 mask, as the sysreg generation script does
not yet generate RAZ/WI fields.
[maz: rewrote commit message, tidy up access_zcr_el2()]
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ZCR_EL2寄存器处理不当，可能导致L2客户机访问不应有的向量长度。以下版本受到影响：6.11版本。
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-2026-63941 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-63941 补丁与修复 (2)
CVE-2026-63941 其他参考 (1)
同批安全公告 · Linux · 2026-07-19 · 共 429 条
| CVE-2026-63795 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64089 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53398 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64142 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63888 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64037 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63887 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63886 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64035 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63800 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64122 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64033 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64150 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64113 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63808 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64025 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64102 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63993 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63994 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63984 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 429 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-63941
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