CVE-2026-52995— 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 2.6.30版本存在安全漏洞，该漏洞源于net/rds中对per-item info buffer未进行清零处理，可能导致本地非特权用户通过RDS套接字泄露内核栈数据。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | ec16227e14141e4fd7ae76354c09dadfe2449d9e< 81651e9d7dea1c048d2952f57632a042931d7b43 |
affected |
ec16227e14141e4fd7ae76354c09dadfe2449d9e< 0797b2e6901827694aa9c34c4c72118c8c97fba1 |
affected | ||
ec16227e14141e4fd7ae76354c09dadfe2449d9e< 5e67cc262afb384e835c3327e9d954eeaedc6a87 |
affected | ||
ec16227e14141e4fd7ae76354c09dadfe2449d9e< b6ba93a7b71ed443c9843eb12d27ed86f1e52694 |
affected | ||
ec16227e14141e4fd7ae76354c09dadfe2449d9e< c7cb9eed8215a790f052f49cdccf577720d2bb62 |
affected | ||
ec16227e14141e4fd7ae76354c09dadfe2449d9e< 91ce1bb6e4194dc2321748f68145359dcf86e350 |
affected | ||
ec16227e14141e4fd7ae76354c09dadfe2449d9e< 912ba2e5704fdb8bc5decda96dfc1a57838f0099 |
affected | ||
ec16227e14141e4fd7ae76354c09dadfe2449d9e< c88eb7e8d8397a8c1db59c425332c5a30b2a1682 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-52995 基础信息
漏洞信息
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Vulnerability Title
net/rds: zero per-item info buffer before handing it to visitors
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/rds: zero per-item info buffer before handing it to visitors
rds_for_each_conn_info() and rds_walk_conn_path_info() both hand a
caller-allocated on-stack u64 buffer to a per-connection visitor and
then copy the full item_len bytes back to user space via
rds_info_copy() regardless of how much of the buffer the visitor
actually wrote.
rds_ib_conn_info_visitor() and rds6_ib_conn_info_visitor() only
write a subset of their output struct when the underlying
rds_connection is not in state RDS_CONN_UP (src/dst addr, tos, sl
and the two GIDs via explicit memsets). Several u32 fields
(max_send_wr, max_recv_wr, max_send_sge, rdma_mr_max, rdma_mr_size,
cache_allocs) and the 2-byte alignment hole between sl and
cache_allocs remain as whatever stack contents preceded the visitor
call and are then memcpy_to_user()'d out to user space.
struct rds_info_rdma_connection and struct rds6_info_rdma_connection
are the only rds_info_* structs in include/uapi/linux/rds.h that are
not marked __attribute__((packed)), so they have a real alignment
hole. The other info visitors (rds_conn_info_visitor,
rds6_conn_info_visitor, rds_tcp_tc_info, ...) write all fields of
their packed output struct today and are not known to be vulnerable,
but a future visitor that adds a conditional write-path would have
the same bug.
Reproduction on a kernel built without CONFIG_INIT_STACK_ALL_ZERO=y:
a local unprivileged user opens AF_RDS, sets SO_RDS_TRANSPORT=IB,
binds to a local address on an RDMA-capable netdev (rxe soft-RoCE on
any netdev is sufficient), sendto()'s any peer on the same subnet
(fails cleanly but installs an rds_connection in the global hash in
RDS_CONN_CONNECTING), then calls getsockopt(SOL_RDS,
RDS_INFO_IB_CONNECTIONS). The returned 68-byte item contains 26
bytes of stack garbage including kernel text/data pointers:
0..7 0a 63 00 01 0a 63 00 02 src=10.99.0.1 dst=10.99.0.2
8..39 00 ... gids (memset-zeroed)
40..47 e0 92 a3 81 ff ff ff ff kernel pointer (max_send_wr)
48..55 7f 37 b5 81 ff ff ff ff kernel pointer (rdma_mr_max)
56..59 01 00 08 00 rdma_mr_size (garbage)
60..61 00 00 tos, sl
62..63 00 00 alignment padding
64..67 18 00 00 00 cache_allocs (garbage)
Fix by zeroing the per-item buffer in both rds_for_each_conn_info()
and rds_walk_conn_path_info() before invoking the visitor. This
covers the IPv4/IPv6 IB visitors and hardens all current and future
visitors against the same class of bug.
No functional change for visitors that fully populate their output.
Changes in v2:
- retarget at the net tree (subject prefix "[PATCH net v2]",
net/rds: prefix in the title)
- pick up Reviewed-by tags from Sharath Srinivasan and
Allison Henderson
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
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 2.6.30版本存在安全漏洞，该漏洞源于net/rds中对per-item info buffer未进行清零处理，可能导致本地非特权用户通过RDS套接字泄露内核栈数据。
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-2026-52995 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-52995 补丁与修复 (8)
同批安全公告 · Linux · 2026-06-24 · 共 219 条
| CVE-2026-53049 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52993 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52989 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52986 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52982 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53002 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53006 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53045 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53086 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53046 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52955 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53010 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53088 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52914 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53055 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52924 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52931 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52999 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53043 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-52958 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 219 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-52995
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