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CVE-2026-98316— ALSA: bcd2000: Fix race between rawmidi and disconnect

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： ALSA: bcd2000：修复 rawmidi 与断开连接之间的竞态条件 尽管我们曾试图修复 bcd2000 驱动程序在 USB 断开连接时潜在的使用后释放（UAF）问题，但仍存在一个被忽略的情况：当 USB 断开连接处理期间，某个 rawmidi 触发回调已在运行时，进行中的函数（例如 bcd2000_midi_send()）仍可能访问 URB（USB 请求块），因为之前的 URB 空值检查与清理操作仅考虑了 URB 完成回调，而未涵盖并发的 rawmidi 操作。 为

AI Predicted 6.5 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 23

VendorProduct Version RangeStatus
Linux Linux 3c00004f134fc819f9d9e202c6a64acde0a1f8d0< 3b824930259d54f5047ce6b5c97bd20db2fc2b98 affected
6c07aad8a7c9ef8ebc4d03a964b882123a349a2e< c83d6b0a65f7b71bbabcc91c045dfbffdff6ae76 affected
eb482a06791d6168beb8c78cc904ac5a5ed96a55< 0a7ecf52cb59ed77ec525deb52c496ea8fba10b1 affected
7df3194bdb7479cad9199889655a566a2c0c1d1b< 812ca56867bec3065c2a27f1ff5ce04e2a8bf4f0 affected
b06ebc7fe25a6af4a9f6e4a3d4236a4178ad4b01< 9c8b6eff6e7505c128b615d9a1364ef66fa5c18e affected
459d3a64766f5ca2f1886daeaf24582831a5f5ab< 221253723dc58bb901c3f27a7659823e63fc598c affected
9af08677aa57debaca5b57c8045c52a83d3dd376 affected
5a77febac6faf6da40fbb4555f703eeb91b58130 affected
… +15 more rows
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I. Basic Information for CVE-2026-98316

Vulnerability Information
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Vulnerability Title
ALSA: bcd2000: Fix race between rawmidi and disconnect
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: bcd2000: Fix race between rawmidi and disconnect Although we tried to fix the potential UAF issues at USB disconnect on bcd2000 driver, there is still an overlooked case -- namely, when a rawmidi trigger callback has been already running at USB disconnect handling, the in-flight function (e.g. bcd2000_midi_send()) could still access the URB, because the previous URB NULL-check & clearance was considered only for the URB complete callbacks, but not about the parallel rawmidi operations. For addressing the race, this patch introduced a new spinlock that covers each rawmidi operation as well as the rawmidi handling in the complete callback. The URB is cleared with the lock, so it guarantees that the pending rawmidi task already finished or a NULL check is effective.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 3c00004f134fc819f9d9e202c6a64acde0a1f8d0 ~ 3b824930259d54f5047ce6b5c97bd20db2fc2b98 -
Linux Linux 7.3-rc1 -

II. Public POCs for CVE-2026-98316

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III. Intelligence Information for CVE-2026-98316

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Patches & Fixes for CVE-2026-98316 (6)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98305 7.8 HIGH net: dsa: mxl862xx: disable the stats poll on teardown
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98311 7.8 HIGH wifi: virt_wifi: don't transfer operstate before register
CVE-2026-98276 7.8 HIGH net: lock the socket in sock_gettstamp()
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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