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CVE-2026-97515— i3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845

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： i3c: 主机: svc: 防止在 NPCM845 上因虚假从机起始（SLVSTART）导致的 IRQ 风暴 在 NPCM845 平台上，当 I3C 总线上的某个从机设备卡住并持续将 SDA 线拉低时，控制器会错误地报告一个主请求（Master Request, MR）带内中断事件。驱动程序通过发出 STOP 条件来尝试恢复总线状态以处理此问题。 然而，硬件特性标志 表明，发出 STOP 条件可能会错误地设置 SLVSTART 中断状态位。在主请求（MR）的情况下，这会形成

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.14% · P3

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 0430bf9bc1ac068c8b8c540eb93e5751872efc51< e9b139c4684ed8593a0b779ca02ea05f460b2eec affected
0430bf9bc1ac068c8b8c540eb93e5751872efc51< 1effa3adfe53cb2bb28bf5640a676b791d5ab405 affected
30748ce7e156f221fb91689b338a0d7df77b732a affected
f2985a1de6f53abbc42c7a696ee6ba8bdecc9426 affected
0541822045ae043d62c941ca31fa76871e436b5e affected
1ea4653cff35c29d1dd0b14ad9c8245e7318f337 affected
d231fb443d8d4042f0dd705b93beba8c916a7344 affected
5.15.185< 5.16 affected
… +8 more rows
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I. Basic Information for CVE-2026-97515

Vulnerability Information
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Vulnerability Title
i3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: i3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845 On NPCM845, when a target on the I3C bus gets stuck holding SDA low, the controller reports a false Master Request (MR) in-band interrupt event. The driver handles this by emitting a STOP condition to restore the bus. However, the hardware quirk SVC_I3C_QUIRK_FALSE_SLVSTART indicates that emitting a STOP condition may spuriously set the SLVSTART interrupt status bit. In the Master Request case, this creates a feedback loop: the STOP triggers a new SLVSTART event, the IRQ handler fires again, the controller still reports an MR type, another STOP is emitted, and the cycle repeats indefinitely, resulting in an IRQ storm that can lock up the CPU. Clear the SLVSTART status bit explicitly after emitting the STOP in the Master Request IBI handler when the SVC_I3C_QUIRK_FALSE_SLVSTART quirk is set. This breaks the feedback loop without affecting normal SLVSTART processing, which is already guarded in the top-level IRQ handler by checking that MSTATUS is in SLVREQ state.
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 0430bf9bc1ac068c8b8c540eb93e5751872efc51 ~ e9b139c4684ed8593a0b779ca02ea05f460b2eec -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-97515

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III. Intelligence Information for CVE-2026-97515

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Patches & Fixes for CVE-2026-97515 (2)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93282 8.1 HIGH ksmbd: fix maximum allowed access checks
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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