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CVE-2026-89946— ASoC: cs35l33: 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.

在 Linux 内核中，以下漏洞已得到修复： ASoC: cs35l33：在运行时挂起之前排空（drain）线程化中断（threaded IRQ） 当前在将编解码器置为 并断电之前，未先静默（quiesce）由 注册的线程化中断。这就留下一个时间窗口，使得在挂起已关闭实时寄存器访问之后， 仍可能继续运行。 一个正在运行的系统可能会在运行时电源管理（runtime PM）期间到达此状态，此时驱动仍有关键故障中断处于未屏蔽（unmasked）状态。如果线程化处理器在该窗口内运行，它会在 启用后读取易失性的 寄存器，忽略

AI Predicted 5.3 Difficulty: Hard EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1595 · Active Scanning

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< d07799302721d381aef834fac8a11d196894eccb affected
3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< 5b5311427e54d9c0d07178ee42df68ba44c2d5ca affected
3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< a04722542c76ce861031384480825afded8cc4f4 affected
3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< 614c2616ea677abfbed917a92bdc5141efff3536 affected
3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< 6ae98918240585eb2ad32b097c4810f4e2dabe88 affected
3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< 6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2 affected
3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< 84cf6acd01a1ec8f30276578a039216327af782e affected
3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8< e074c12c428c633e079154301207a6079a208583 affected
… +10 more rows
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I. Basic Information for CVE-2026-89946

Vulnerability Information
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Vulnerability Title
ASoC: cs35l33: 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: cs35l33: drain threaded IRQ before runtime suspend cs35l33_runtime_suspend() currently switches the codec into regcache_cache_only(true) and powers it down without first quiescing the threaded IRQ registered by devm_request_threaded_irq(). That leaves a window where cs35l33_irq_thread() can still run after suspend has closed off live register 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_1/2 after cache_only has been enabled, ignores the regmap_read() failures, and can still drive the AMP_SHORT_RLS, CAL_ERR_RLS, OTE_RLS, and OTW_RLS release paths. Use disable_irq() before entering cache_only/power-off so any in-flight threaded handler is drained and no new IRQ thread can run during the suspended state. Re-enable the IRQ only after runtime_resume() has restored live register access with regcache_sync(). Since probe only warns if devm_request_threaded_irq() fails, 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 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 ~ d07799302721d381aef834fac8a11d196894eccb -
Linux Linux 4.8 -

II. Public POCs for CVE-2026-89946

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III. Intelligence Information for CVE-2026-89946

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Other References for CVE-2026-89946 (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-2026-89946

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