CVE-2026-31402— 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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未验证LOCK响应大小，可能导致堆缓冲区溢出。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f9fcb4441f6c02bb20c2eb340101e27dfe23607c |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2665887a69437a8a4f552f69509eecfb73d4aa19 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c9452c0797c95cf2378170df96cf4f4b3bca7eff |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8afb437ea1f70cacb4bbdf11771fb5c4d720b965 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< dad0c3c0a8e5d1d6eb0fc455694ce3e25e6c57d0 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0f0e2a54a31a7f9ad2915db99156114872317388 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ae8498337dfdfda71bdd0b807c9a23a126011d76 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5133b61aaf437e5f25b1b396b14242a6bb0508e2 |
affected | ||
| … +10 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-31402 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
nfsd: fix heap overflow in NFSv4.0 LOCK replay cache
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
nfsd: fix heap overflow in NFSv4.0 LOCK replay cache
The NFSv4.0 replay cache uses a fixed 112-byte inline buffer
(rp_ibuf[NFSD4_REPLAY_ISIZE]) to store encoded operation responses.
This size was calculated based on OPEN responses and does not account
for LOCK denied responses, which include the conflicting lock owner as
a variable-length field up to 1024 bytes (NFS4_OPAQUE_LIMIT).
When a LOCK operation is denied due to a conflict with an existing lock
that has a large owner, nfsd4_encode_operation() copies the full encoded
response into the undersized replay buffer via read_bytes_from_xdr_buf()
with no bounds check. This results in a slab-out-of-bounds write of up
to 944 bytes past the end of the buffer, corrupting adjacent heap memory.
This can be triggered remotely by an unauthenticated attacker with two
cooperating NFSv4.0 clients: one sets a lock with a large owner string,
then the other requests a conflicting lock to provoke the denial.
We could fix this by increasing NFSD4_REPLAY_ISIZE to allow for a full
opaque, but that would increase the size of every stateowner, when most
lockowners are not that large.
Instead, fix this by checking the encoded response length against
NFSD4_REPLAY_ISIZE before copying into the replay buffer. If the
response is too large, set rp_buflen to 0 to skip caching the replay
payload. The status is still cached, and the client already received the
correct response on the original request.
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未验证LOCK响应大小，可能导致堆缓冲区溢出。
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-2026-31402 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-2026-31402 的情报信息
请登录查看更多情报信息。
CVE-2026-31402 补丁与修复 (1)
同批安全公告 · Linux · 2026-04-03 · 共 71 条
| CVE-2026-23450 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23428 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23455 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23425 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23461 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23462 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23457 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23459 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23456 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31393 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31392 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31396 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23432 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31401 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23458 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23437 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23444 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23449 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23445 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 71 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-31402
暂无评论