CVE-2026-80561— libceph 多个不安全解码远程代码执行漏洞
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。
在 Linux 内核中，已修复以下漏洞： libceph：修复 decode_locker() 中的多处不安全解码操作 中的 包含三处不安全的解码操作，使得恶意或已受控的 OSD 能够触发 slab 越界读取： 1. 在 的 字段处调用 时，前面缺少边界检查。当 接受 后，若 ，则会读取超出已验证缓冲区边界 9 字节（即 ）。 2. 在读取 头部之后执行的 是一个未检查的指针推进。恶意 OSD 可以将指针 移动到 之后，导致后续所有 检查相对于错误的边界通过。 3. 前面同样缺少边界检查，而紧随其后的 也没有上限控
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | d4ed4a530562881cc5225050e42d96034f405aae< 1ed45c8d96498725eb54f740172f9068d8673906 |
affected |
d4ed4a530562881cc5225050e42d96034f405aae< 6265103e78f0ee7e2518de9cf938b94bee9700a0 |
affected | ||
d4ed4a530562881cc5225050e42d96034f405aae< 3c3716dc06a34e4ca7f743f5fcfa07fbc5a11070 |
affected | ||
d4ed4a530562881cc5225050e42d96034f405aae< fa4aa86fff0c56799c2e3f51a88879053285f4a9 |
affected | ||
d4ed4a530562881cc5225050e42d96034f405aae< dbfd83f722a78446ec18a476ef7a38e52240b50a |
affected | ||
d4ed4a530562881cc5225050e42d96034f405aae< d1bba38574d095f191557d397d9633f08cd966b1 |
affected | ||
d4ed4a530562881cc5225050e42d96034f405aae< 51c8d238fe7236de627ab1a1433694552a904136 |
affected | ||
d4ed4a530562881cc5225050e42d96034f405aae< 437b6551cfcc235eea1d735a874f9d421f555e17 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-80561 基础信息
漏洞信息
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Vulnerability Title
libceph: fix multiple unsafe decodes in decode_locker()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
libceph: fix multiple unsafe decodes in decode_locker()
decode_locker() in cls_lock_client.c contains three unsafe decode
operations that allow a malicious or compromised OSD to trigger
slab-out-of-bounds reads:
1. ceph_decode_copy() at the locker_id_t name field has no preceding
bounds check. With p == end after ceph_start_decoding() accepts
struct_len=0, this reads sizeof(ceph_entity_name) = 9 bytes past
the validated buffer boundary.
2. *p += sizeof(struct ceph_timespec) after the locker_info_t header
is an unchecked pointer advance. A malicious OSD can position p
past end, causing all subsequent _safe checks to pass against a
bogus boundary.
3. len = ceph_decode_32(p) has no preceding bounds check, and the
immediately following *p += len is uncapped. A malicious OSD can
send len=0xffffffff, advancing p gigabytes past end and escaping
the decode window entirely.
Fix all three by replacing bare operations with their safe variants:
ceph_decode_copy -> ceph_decode_copy_safe
*p += sizeof(...) -> ceph_decode_skip_n
ceph_decode_32(p) -> ceph_decode_32_safe
*p += len -> ceph_decode_skip_n
A new label is added to return -EINVAL on any bounds violation.
-EINVAL is appropriate here: the data received from the OSD
is structurally malformed, which is an invalid argument to the decode
contract regardless of whether the caller or the wire is at fault.
Attacker model: a malicious or compromised OSD in a multi-tenant Ceph
deployment can trigger this against any kernel client that issues the
lock.get_info class method (e.g. during RBD exclusive lock acquisition)
without any further privileges beyond OSD session establishment.
[ idryomov: use ceph_decode_skip_string() to skip description, trim
changelog ]
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
受影响产品
二、漏洞 CVE-2026-80561 的公开POC
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|---|
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CVE-2026-80561 补丁与修复 (8)
同批安全公告 · Linux · 2026-08-26 · 共 92 条
| CVE-2026-80589 | 9.8 CRITICAL | 磁盘块：释放未添加磁盘时停止超时定时器 |
| CVE-2026-74752 | 9.8 CRITICAL | SCTP协议Cookie AUTH状态校验前使用漏洞 |
| CVE-2026-80519 | 9.8 CRITICAL | OpenVPN 加密回调清理漏洞 |
| CVE-2026-74746 | 9.8 CRITICAL | Netfilter 流表 GC 可见元组发布顺序漏洞 |
| CVE-2026-80528 | 9.8 CRITICAL | Ceph 文件回收竞态漏洞 |
| CVE-2026-74744 | 9.8 CRITICAL | Linux内核ipvlan模块继承headroom/tailroom |
| CVE-2026-74743 | 9.8 CRITICAL | macvlan 继承底层设备头部尾部空间 |
| CVE-2026-80558 | 9.8 CRITICAL | Ceph libceph 模块 OSID 索引缺陷 |
| CVE-2026-80586 | 9.8 CRITICAL | Linux内核 MPTCP 模块异常尺寸处理缺陷 |
| CVE-2026-80557 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74737 | 9.8 CRITICAL | TI AM65 CPSW 驱动端口ID提取错误 |
| CVE-2026-80587 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-80585 | 9.4 CRITICAL | Linux 内核 MPTCP 快开子流标记错误 |
| CVE-2026-74751 | 9.4 CRITICAL | RISC-V ZBB strnlen越界读取 |
| CVE-2026-80554 | 9.3 CRITICAL | Linux s390/vfio_ccw 通道程序段数限制 |
| CVE-2026-80551 | 9.3 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-80576 | 8.8 HIGH | AMD GPU 驱动拒绝超大IB |
| CVE-2026-80553 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-80552 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-80547 | 8.8 HIGH | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2026-80561
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