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CVE-2026-46090— ALSA: aloop: Fix peer runtime UAF during format-change stop

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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ALSA aloop驱动在格式变更停止时未正确处理peer runtime的UAF问题，可能导致并发关闭时访问已释放的runtime。

CVSS 7.8 · High EPSS 0.10% · P1

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 597603d615d2b19a9e451d8cfac24372856a522d< 83bd62fa9620ac98d5d694bde14c50f98c8e7189 affected
597603d615d2b19a9e451d8cfac24372856a522d< 345c24b2bcf0923dfae1ab41497351c68214ff76 affected
597603d615d2b19a9e451d8cfac24372856a522d< 03f52a9c170431e8f10e156b9dc0dae80b3e9198 affected
597603d615d2b19a9e451d8cfac24372856a522d< bdd9503c3d222d2735b56c7a8b4422ccf3de6e5c affected
597603d615d2b19a9e451d8cfac24372856a522d< 5d45e34bf001344e2966dabca1897561bbc9e913 affected
597603d615d2b19a9e451d8cfac24372856a522d< e5c33cdc6f402eab8abd36ecf436b22c9d3a8aff affected
2.6.37 affected
< 2.6.37 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-46090

Vulnerability Information
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Vulnerability Title
ALSA: aloop: Fix peer runtime UAF during format-change stop
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Fix peer runtime UAF during format-change stop loopback_check_format() may stop the capture side when playback starts with parameters that no longer match a running capture stream. Commit 826af7fa62e3 ("ALSA: aloop: Fix racy access at PCM trigger") moved the peer lookup under cable->lock, but the actual snd_pcm_stop() still runs after dropping that lock. A concurrent close can clear the capture entry from cable->streams[] and detach or free its runtime while the playback trigger path still holds a stale peer substream pointer. Keep a per-cable count of in-flight peer stops before dropping cable->lock, and make free_cable() wait for those stops before detaching the runtime. This preserves the existing behavior while making the peer runtime lifetime explicit.
Source: 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
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ALSA aloop驱动在格式变更停止时未正确处理peer runtime的UAF问题，可能导致并发关闭时访问已释放的runtime。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 597603d615d2b19a9e451d8cfac24372856a522d ~ 83bd62fa9620ac98d5d694bde14c50f98c8e7189 -
Linux Linux 2.6.37 -

II. Public POCs for CVE-2026-46090

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III. Intelligence Information for CVE-2026-46090

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Patches & Fixes for CVE-2026-46090 (5)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45951 7.8 HIGH bpf: Fix a potential use-after-free of BTF object
CVE-2026-45929 7.8 HIGH ovpn: fix possible use-after-free in ovpn_net_xmit
CVE-2026-46006 7.8 HIGH drm/nouveau: fix u32 overflow in pushbuf reloc bounds check
CVE-2026-46058 7.8 HIGH media: amphion: Fix race between m2m job_abort and device_run
CVE-2026-46062 7.8 HIGH ntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-45878 7.8 HIGH drm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-45956 7.8 HIGH drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46090

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