CVE-2026-74524— RISC-V内存热移除越界页表遍历漏洞
可能的 ATT&CK 技术 1AI
T1564 · Hide Artifacts影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c75a74f4ba19c904c0ae1e011ae2568449409ae4< 1da6d832eda02d908df11a30ba6a856b98a3dd76 | affected |
c75a74f4ba19c904c0ae1e011ae2568449409ae4< 54e07a158f7aea2754849d3a5a4cba1ac338ae7e | affected | ||
c75a74f4ba19c904c0ae1e011ae2568449409ae4< 1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2 | affected | ||
c75a74f4ba19c904c0ae1e011ae2568449409ae4< a0188cc133696627857d16054e43f9ebc7efc821 | affected | ||
6.11 | affected | ||
< 6.11 | unaffected | ||
6.12.103≤ 6.12.* | unaffected | ||
6.18.44≤ 6.18.* | unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2026-74524 基础信息
漏洞信息
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Vulnerability Title
riscv: mm: Fix out-of-bounds page-table walk during memory hot-remove
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: riscv: mm: Fix out-of-bounds page-table walk during memory hot-remove remove_pud_mapping() and remove_p4d_mapping() obtain a child table base with pud_offset(p4dp, 0) and p4d_offset(pgd, 0), then add the index for addr. RISC-V folds page-table levels at runtime. When a level is folded, its offset helper returns the parent entry itself, but the index can still be nonzero. Adding it walks past the parent table. Sv48 folds P4D, while Sv39 folds both P4D and PUD, so memory hot-remove can descend into unrelated memory and pass an invalid page to __free_pages(). This can trigger: kernel BUG at include/linux/mm.h:1810! VM_BUG_ON_PAGE(page_ref_count(page) == 0) arch_remove_memory+0x1e/0x5c try_remove_memory+0x15e/0x200 remove_memory+0x24/0x3c Only add the index when the corresponding page-table level is enabled, matching p4d_offset() and pud_offset().
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-74524 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-74524 补丁与修复 (4)
同批安全公告 · Linux · 2026-08-15 · 共 846 条
| CVE-2026-74475 | 10.0 CRITICAL | vxlan 短路由中 neigh_ha_snapshot() 使用错误 |
| CVE-2026-72421 | 10.0 CRITICAL | IPv4 fib 本地/主表忽略错误路由 |
| CVE-2026-74279 | 10.0 CRITICAL | Cavium CPT DMA清理使用错误循环索引 |
| CVE-2026-74280 | 10.0 CRITICAL | Marvell OCTEONTX 驱动 DMA清理循环索引错误漏洞 |
| CVE-2026-74309 | 10.0 CRITICAL | vdpa/octeon_ep 中断处理程序 IRQ 到环映射错误 |
| CVE-2026-72408 | 10.0 CRITICAL | Geneve GRO提示处理缺陷 |
| CVE-2026-72407 | 10.0 CRITICAL | Geneve 内核模块 inner network offset 验证漏洞 |
| CVE-2026-72493 | 9.9 CRITICAL | net: 在 enqueue_to_backlog() 中序列化 netif_running() 检查 |
| CVE-2026-74433 | 9.8 CRITICAL | rxrpc rxgk_issue_challenge() Use-After-Free 漏洞 |
| CVE-2026-72208 | 9.8 CRITICAL | NTFS 文件系统 EA 条目访问越界漏洞 |
| CVE-2026-72065 | 9.8 CRITICAL | mana 驱动网卡包长度验证漏洞 |
| CVE-2026-72064 | 9.8 CRITICAL | Mana驱动同步页面池RX碎片 |
| CVE-2026-72317 | 9.8 CRITICAL | SUNRPC 跨 TLS 连接工作线程固定 rpc_clnt 漏洞 |
| CVE-2026-74427 | 9.8 CRITICAL | AFS 网络命名空间销毁预分配充电器漏洞 |
| CVE-2026-72137 | 9.8 CRITICAL | Linux xfrm nat_keepalive发送错误时双重释放漏洞 |
| CVE-2026-72429 | 9.8 CRITICAL | IPv6 ioam: dst_entry类型混淆漏洞 |
| CVE-2026-74428 | 9.8 CRITICAL | rxrpc rxrpc_recvmsg()双重解锁漏洞 |
| CVE-2026-72139 | 9.8 CRITICAL | Linux tcp_connect RCU宽限期后释放md5sig_info导致内存错误漏洞 |
| CVE-2026-72436 | 9.8 CRITICAL | Netfilter ipset 哈希类型锁读竞争漏洞 |
| CVE-2026-72046 | 9.8 CRITICAL | gve: header-split 和 HW-GRO 导致头缓冲区损坏漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2026-74524
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