CVE-2026-80628— Linux内核 ALSA seq 并发控制漏洞
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： ALSA: seq: oss: 使用 q->lock 串行化 readq 的复位状态 在重置 、 和 时未使用 ，尽管正常的读取者和生产者路径会在该自旋锁下对这些环形缓冲区状态进行串行化访问。因此，复位操作可能与 或 发生竞争条件，导致队列中残留陈旧记录、丢失新入队的记录，或在唤醒后报告错误的就绪状态。KCSAN 报告了 与 之间的数据竞争。 修复方案： 在清空环形缓冲区并重置 时获取 。将入队逻辑提取到一个由调用方加锁的辅助函数中，使得 在相同的锁保护下更新其抑制状态
可能的 ATT&CK 技术 1 AI
T1015影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 287d506d4e0865918cec82bb1361f283a08c979b |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 43e10709b1ba288bcbabb9b9cb6e518b2a5d8506 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 49ce92d207820f588b0406add82f053decfbe5d9 |
affected | ||
2.6.12 |
affected | ||
< 2.6.12 |
unaffected | ||
6.18.40≤ 6.18.* |
unaffected | ||
7.1.5≤ 7.1.* |
unaffected | ||
7.2≤ * |
unaffected |
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一、 漏洞 CVE-2026-80628 基础信息
漏洞信息
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Vulnerability Title
ALSA: seq: oss: Serialize readq reset state with q->lock
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: seq: oss: Serialize readq reset state with q->lock
snd_seq_oss_readq_clear() resets qlen, head, and tail without
q->lock even though the normal reader and producer paths serialize the
same ring state under that spinlock. A reset can therefore race
snd_seq_oss_readq_free() or snd_seq_oss_readq_put_event() and leave
stale records in the queue, drop freshly queued ones, or report the
wrong readiness after wakeup. KCSAN reports a data race between
snd_seq_oss_readq_clear() and snd_seq_oss_readq_free().
Take q->lock while clearing the ring and resetting input_time. Factor
the enqueue logic into a caller-locked helper so
snd_seq_oss_readq_put_timestamp() updates its suppression state under
the same lock instead of racing the reset path.
The buggy scenario involves two paths, with each column showing the
order within that path:
reset path: locked readq updater:
1. snd_seq_oss_reset() or 1. A reader or callback producer
release reaches takes q->lock on the same queue.
snd_seq_oss_readq_clear().
2. snd_seq_oss_readq_clear() 2. The updater tests or modifies
resets qlen, head, tail, qlen, head, and tail.
and input_time.
3. snd_seq_oss_readq_clear() 3. The updater completes its
wakes sleepers on read-modify-write sequence.
q->midi_sleep.
4. Without q->lock, the reset 4. The resulting ring state drives
can overlap the locked later reads and readiness.
update.
KCSAN reports:
BUG: KCSAN: data-race in snd_seq_oss_readq_clear /
snd_seq_oss_readq_free
write to 0xffff8881069fe608 of 4 bytes by task 120516 on cpu 0:
snd_seq_oss_readq_free+0x6c/0x80
snd_seq_oss_read+0xcb/0x250
odev_read+0x38/0x60
vfs_read+0xff/0x600
ksys_read+0xb4/0x140
__x64_sys_read+0x46/0x60
do_syscall_64+0xbb/0x2f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
read to 0xffff8881069fe608 of 4 bytes by task 120517 on cpu 1:
snd_seq_oss_readq_clear+0x1f/0x90
snd_seq_oss_reset+0xa7/0xf0
snd_seq_oss_ioctl+0x6f6/0x7e0
odev_ioctl+0x56/0xc0
__x64_sys_ioctl+0xd1/0x120
do_syscall_64+0xbb/0x2f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
value changed: 0x00000001 -> 0x00000000
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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-2026-80628 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-80628 补丁与修复 (3)
同批安全公告 · Linux · 2026-08-28 · 共 135 条
| CVE-2026-80634 | 9.8 CRITICAL | Netfilter flowtable 整数下溢漏洞 |
| CVE-2026-80694 | 9.8 CRITICAL | MTK网络驱动 mtk_eth_soc 缺陷 |
| CVE-2026-80681 | 9.8 CRITICAL | Linux Kernel 内核 Vxlan 远程代码执行漏洞 |
| CVE-2026-80674 | 9.8 CRITICAL | NTFS 文件系统属性列表验证与校验器增强 |
| CVE-2026-80673 | 9.8 CRITICAL | NTFS 属性查找中前瞻条目越界读取漏洞 |
| CVE-2026-80668 | 9.8 CRITICAL | Netfilter nf_conntrack 期望回收机制更新 |
| CVE-2026-80630 | 9.8 CRITICAL | Linux 内核 net/sched 模块内存损坏漏洞 |
| CVE-2026-80617 | 9.8 CRITICAL | Linux 内核 airoha 驱动堆缓冲区溢出漏洞 |
| CVE-2026-80612 | 9.8 CRITICAL | Linux 内核 lwtunnel 封装前丢弃元数据 |
| CVE-2026-80714 | 9.8 CRITICAL | IPVS 同步连接标志处理缺陷 |
| CVE-2026-80609 | 9.8 CRITICAL | qede 驱动 cqe 越界检查修复 |
| CVE-2026-80600 | 9.8 CRITICAL | batman-adv 数据转发 缓冲区溢出漏洞 |
| CVE-2026-80693 | 9.3 CRITICAL | iDPF 中断向量寄存器数组填充越界 |
| CVE-2026-80684 | 9.3 CRITICAL | KVM s390 PCI AIBV 分配失败空指针解引用 |
| CVE-2026-80671 | 9.3 CRITICAL | Linux内核 perf sched 缓冲区溢出漏洞 |
| CVE-2026-80603 | 9.1 CRITICAL | Linux内核 netfilter IRC模块越界读取漏洞 |
| CVE-2026-80670 | 9.1 CRITICAL | Linux 内核 perf 工具 CPU 拓扑解析修复 |
| CVE-2026-80721 | 8.8 HIGH | Linux Bluetooth ISO 悬空引用漏洞 |
| CVE-2026-80722 | 8.8 HIGH | Wi-Fi mac80211 参数校验漏洞 |
| CVE-2026-80724 | 8.8 HIGH | Linux内核 ptp 模块只读映射可写漏洞 |
显示前 20 条，共 135 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-80628
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