CVE-2026-98314— ALSA pcm 设置计时器私有数据前未注册
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： ALSA: pcm：在注册 PCM 计时器之前设置 timer->private_data snd_pcm_timer_init() 调用 snd_device_register() 将新的 struct snd_timer 链接到全局计时器列表中，此时该计时器仍保留 hw.c_resolution = snd_pcm_timer_resolution（以及 hw.start/hw.stop），而 timer->private_data = substream 的赋值操作仅
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 27f167e117eca310661fbcbacb352ea08face067 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 555d168bd98daa46daccc68c908201388c834293 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8c869d5cf5affb20994bdbb60e7d46d65c91b55f |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 686c7a6af1eea8d2a919303e4c6bbec3de79dbdc |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< e1eee8f16628f8b6bcae0a366fd6a2dd65e71edd |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< d63f5a9f8121fb43c798056d7dd34c58f47185d7 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0b349249d572633d7c8cdeb917623d1676a2b7c3 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1e713f9bb2ac583521f06b0eb4e22440b1e3d078 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-98314 基础信息
漏洞信息
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Vulnerability Title
ALSA: pcm: set timer->private_data before registering the PCM timer
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: pcm: set timer->private_data before registering the PCM timer
snd_pcm_timer_init() calls snd_device_register() to link the new
struct snd_timer into the global timer list while it still carries
hw.c_resolution = snd_pcm_timer_resolution (and hw.start/hw.stop),
and only afterwards sets timer->private_data = substream.
Once the timer is on the list under register_mutex, a concurrent
reader can already reach it through the same mutex and invoke these
callbacks. /proc/asound/timers does this via c_resolution(), and
snd_timer_open()+snd_timer_start() reach start()/stop() the same way.
All three dereference timer->private_data, which for this brief
window is NULL, giving a NULL-pointer dereference:
substream = timer->private_data;
return substream->runtime ? ... // substream is NULL
Move the private_data/private_free assignment before
snd_device_register() so the timer is never visible on the list
without its private_data set. On the snd_device_register() failure
path, private_free() (snd_pcm_timer_free()) can now run, but it only
does substream->timer = NULL, which is already NULL at that point
since substream->timer is set to the new timer just once, after a
successful registration -- so the failure path stays safe.
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-2026-98314 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-98314 补丁与修复 (8)
同批安全公告 · Linux · 2026-10-06 · 共 208 条
| CVE-2026-98323 | 9.8 CRITICAL | RDMA/siw 分片头拷贝边界漏洞 |
| CVE-2026-98365 | 9.8 CRITICAL | RDMA/rxe mr_check_range() 整数溢出导致越界访问漏洞 |
| CVE-2026-98282 | 8.8 HIGH | PowerPC IOMMU iommu_tce_check_ioba 溢出验证修复 |
| CVE-2026-98283 | 8.8 HIGH | KVM: PPC Book3S HV tlbie_all_lpid 使用后释放漏洞 |
| CVE-2026-98339 | 8.8 HIGH | cfg80211 移除过时条目时过滤BSS类型漏洞 |
| CVE-2026-98171 | 8.8 HIGH | smb 客户端修复复合 PDU 中 next_buffer UAF 及 NextCommand 越界漏洞 |
| CVE-2026-98261 | 8.1 HIGH | CIFS 服务器 cifs_chan_skip_or_disable() 函数中的使用后释放漏洞 |
| CVE-2026-98357 | 8.1 HIGH | IB/isert 释放连接前等待控制PDU完成漏洞 |
| CVE-2026-98239 | 8.1 HIGH | lan743x 网卡 RX 校验和使用后释放漏洞 |
| CVE-2026-98305 | 7.8 HIGH | mxl862xx 网络驱动在 teardown 时禁用统计轮询 |
| CVE-2026-98341 | 7.8 HIGH | WiFi: cfg80211驱动扫描请求释放漏洞 |
| CVE-2026-98320 | 7.8 HIGH | netfilter flowtable 在流释放前持有 ct 引用漏洞 |
| CVE-2026-98228 | 7.8 HIGH | MIPS EQE4 系统内核配置错误 |
| CVE-2026-98229 | 7.8 HIGH | Linux内核xfrm安全路径重置前保存输入状态数据 |
| CVE-2026-98318 | 7.8 HIGH | SMB客户端修复相对原生符号链接目标验证漏洞 |
| CVE-2026-98315 | 7.8 HIGH | NTFS运行列表更新缺少锁保护 |
| CVE-2026-98311 | 7.8 HIGH | virt_wifi 未注册前转移 operstate 漏洞 |
| CVE-2026-98276 | 7.8 HIGH | Linux 内核 sock_gettstamp 函数锁机制漏洞 |
| CVE-2026-98258 | 7.8 HIGH | Linux内核posix-cpu-timers释放过期列表定时器漏洞 |
| CVE-2026-98260 | 7.8 HIGH | exec 清理 POSIX 定时器漏洞 |
显示前 20 条，共 208 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-98314
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