CVE-2026-98123— Linux内核sctp软锁死漏洞
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，以下漏洞已得到修复： sctp：修复因未对齐 ASCONF-ACK 参数遍历导致的软锁死（soft lockup）问题 函数使用 来遍历 ASCONF-ACK 参数，该函数以 为单位进行步进（即按 4 字节对齐填充长度）；而消费者函数 则以原始长度（无填充）进行遍历。当存在一个长度为奇数的参数时，会导致两种遍历方式不同步，从而使消费者在错误偏移处解析攻击者可控的数据。 当这些被错误解析的数据返回的长度值为零时， 中基于 的 while 循环将无法前进，在中断上下文（softirq conte
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ba54cad229977f4fae6355dbdaf117088414fdd0 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 7d8e7ab6a0665888beee91f7ad77ac805963c4fd |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5fbc6a778d5fce7628821236972596acb18e1065 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4548d843e7b29f6d150d8caae4e64015fa226b0c |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< abf59d7f6fff23227256e8199aca5ade45758f8b |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3be02999ab9131a4b96eb1eda4ca48b1cea80f03 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 7ba84e2971d208a2d6413a334ec28a8a32cdce0f |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2cb0b0b1ed69430bf73740377ea0a1c44c50db63 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-98123 基础信息
漏洞信息
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Vulnerability Title
sctp: fix soft lockup from unpadded ASCONF-ACK parameter iteration
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: fix soft lockup from unpadded ASCONF-ACK parameter iteration
sctp_verify_asconf() walks ASCONF-ACK parameters with
sctp_walk_params(), which advances by SCTP_PAD4(length), while the
consumer sctp_get_asconf_response() iterates the same parameters
advancing by the raw length, without padding. A single odd-length
parameter desynchronises the two walks and makes the consumer
interpret attacker-controlled bytes at a misaligned offset.
When those bytes yield a length of zero, the while loop over
asconf_ack_len makes no progress, spinning forever in softirq
context, and the watchdog reports a soft lockup. All reads stay
within the received skb, so the lockup is a pure remote denial of
service. A remote peer can trigger it with a crafted ASCONF-ACK on
an ADD-IP enabled association with an outstanding ASCONF (RFC 5061
section 4.1.2 requires the chunk to be authenticated, but the
predefined empty key id 0 allows the peer to compute the same
association HMAC from publicly exchanged parameters, so the gate
does not help).
The SCTP_PARAM_ERR_CAUSE case of sctp_verify_asconf() also performs
no length check, letting a parameter without a complete error
header reach the consumer, which reads errhdr.cause past the end of
the parameter, an out-of-bounds read.
Reject SCTP_PARAM_ERR_CAUSE parameters shorter than
sizeof(struct sctp_addip_param) + sizeof(struct sctp_errhdr) at the
verifier, and advance the consumer iterator with the same padding
rule as the verifier to keep the two walks in lockstep. The verifier
change guarantees a complete error header in every ERR_CAUSE
parameter the consumer can see, so the consumer's asconf_ack_len
check is dropped and it returns err_param->cause directly. The
consumer padding fix is still required because odd lengths remain
valid for SCTP_PARAM_ERR_CAUSE per RFC 5061.
The issue was found by ZeroHive, a vulnerability hunting agent at
Tencent Yunding Lab.
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-2026-98123 的公开POC
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CVE-2026-98123 补丁与修复 (8)
同批安全公告 · Linux · 2026-09-25 · 共 372 条
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt：srpt_alloc_rw_ctxs() 未释放计数器修复 |
| CVE-2026-97555 | 8.8 HIGH | smb客户端：修复DACL所有者/组重写中的堆溢出漏洞 |
| CVE-2026-97957 | 8.8 HIGH | hinic 邮箱段缓冲区溢出漏洞 |
| CVE-2026-97527 | 8.8 HIGH | qla2xxx SCSI驱动程序 NVMe未解决上下文列表竞争条件漏洞 |
| CVE-2026-97528 | 8.8 HIGH | QLogic qla2xxx驱动LS拒绝错误NVMe内存泄漏漏洞 |
| CVE-2026-98115 | 8.8 HIGH | ksmbd 注销期间会话安全排空漏洞 |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat：内核页表分裂页表分配漏洞 |
| CVE-2026-98069 | 8.1 HIGH | Net/RDS rds_conn_shutdown() 快速路径锁获取漏洞 |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en 驱动 bnxt_rx_ring_reset 缓冲区分配失败漏洞 |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: 修复因SW TPA ID绑定问题导致的崩溃漏洞 |
| CVE-2026-98130 | 8.1 HIGH | SCTP定时器启动竞争条件漏洞 |
| CVE-2026-98070 | 8.1 HIGH | Linux RDS 模块远程代码执行漏洞 |
| CVE-2026-98122 | 7.8 HIGH | Linux内核vxlan mdb远程源删除后使用漏洞 |
| CVE-2026-97575 | 7.8 HIGH | v4l2-ctrls AV1瓦片计数验证漏洞 |
| CVE-2026-97576 | 7.8 HIGH | V4L2-ctrls HEVC 瓦片计数验证漏洞 |
| CVE-2026-97941 | 7.8 HIGH | Linux 内核 slab 内存分配器竞态条件漏洞 |
| CVE-2026-98112 | 7.8 HIGH | ksmbd 网络接口事件中监听器任务生命周期修复漏洞 |
| CVE-2026-98116 | 7.8 HIGH | ALSA: PCM内存映射与缓冲区重新分配序列化以修复页面UAF漏洞 |
| CVE-2026-97580 | 7.8 HIGH | rkvdec HEVC解析数组越界漏洞 |
| CVE-2026-97940 | 7.8 HIGH | IPv6 修复 fib6 遍历器在 seq 停止时存在 UAF 漏洞 |
显示前 20 条，共 372 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-98123
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