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CVE-2026-89945— ASoC: cs35l34: drain threaded IRQ before runtime suspend

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 内核中，以下漏洞已修复： ASoC: cs35l34：在运行时挂起前排空（drain）线程化中断 当前会将编解码器（codec）切换至 状态，拉低复位（reset low），并在未先静默（quiesce）由 注册的线程化中断的情况下，直接关闭设备电源。这导致了一个时间窗口，在此窗口内， 仍可能在挂起后继续执行，而此时硬件访问已被移除。 一个正在运行的系统可能在运行时电源管理（Runtime PM）期间触发此问题，而驱动此时可能仍有关键的故障中断（fault IRQs）未被屏蔽。如果线程化中断处理函数在该

AI Predicted 7.5 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1680 · Local Storage Discovery

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c1124c09e1035cabdbc17d4538ae6f922086fec9< 3be8380fb14d602cd833e5852e6d83c1e7eb1ceb affected
c1124c09e1035cabdbc17d4538ae6f922086fec9< 96982734e765c13c3db02067e1d5784682085f5c affected
c1124c09e1035cabdbc17d4538ae6f922086fec9< 5b063739619990d5de0c94c85d6e5be14e7cbdfe affected
c1124c09e1035cabdbc17d4538ae6f922086fec9< f4bfd755c52dfa7584e6c9374206b71b8895c997 affected
c1124c09e1035cabdbc17d4538ae6f922086fec9< 4fe8a91a9266f1321c2d31ce67940a4e8b93559e affected
c1124c09e1035cabdbc17d4538ae6f922086fec9< 5a4fe7a87841af23ba80bae31b80355b16926cf4 affected
c1124c09e1035cabdbc17d4538ae6f922086fec9< 07a86575edc308e66b6c8873ed4a93ef3a063e55 affected
c1124c09e1035cabdbc17d4538ae6f922086fec9< 4105a4c0678b2808fc8046b60321b4f1cc7dae75 affected
… +10 more rows
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I. Basic Information for CVE-2026-89945

Vulnerability Information
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Vulnerability Title
ASoC: cs35l34: drain threaded IRQ before runtime suspend
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: cs35l34: drain threaded IRQ before runtime suspend cs35l34_runtime_suspend() currently switches the codec into regcache_cache_only(true), asserts reset low, and powers the device off without first quiescing the threaded IRQ registered by devm_request_threaded_irq(). That leaves a window where cs35l34_irq_thread() can still run after suspend has removed live hardware access. A running system can reach this during runtime PM while the driver still has critical fault IRQs unmasked. If the threaded handler runs in that window, it reads volatile INT_STATUS_1..4 after cache_only has been enabled, ignores the regmap_read() failures, and can still execute the PROT_RELEASE_CTL release sequence or the BST fault power-down writes. Use disable_irq() before entering cache_only/reset-low/power-off so any in-flight threaded handler is drained and no new IRQ thread can run while the device is suspended. Re-enable the IRQ only after runtime_resume() has restored live register access with regcache_sync(). Since probe only logs request_threaded_irq() failures and keeps going, track whether the IRQ was actually installed before disabling or re-enabling it.
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 c1124c09e1035cabdbc17d4538ae6f922086fec9 ~ 3be8380fb14d602cd833e5852e6d83c1e7eb1ceb -
Linux Linux 4.10 -

II. Public POCs for CVE-2026-89945

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III. Intelligence Information for CVE-2026-89945

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Other References for CVE-2026-89945 (8)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89945

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