TI-2026-64145 Aliases CVE-2026-97515 GHSA-jcmj-p262-2c6x

i3c: master: svc: Prevent IRQ storm from false SLVSTART on NPCM845

LOW 22Published 2026-09-24 · Updated 2026-10-21

Key facts

Attack vector: —
Privileges required: —
User interaction: —
Attack complexity: —
Impact type: —
Confidentiality · integrity · availability: —
Fix status: Fixed

No CVSS vector from any source. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.0016 5th percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.12.114, 5.16, 6.2 +4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.12.31 to before 6.12.114; 5.15.185 to before 5.16; 6.1.141 to before 6.2; 6.6.93 to before 6.7; 6.14.9 to before 6.15	6.12.114, 5.16, 6.2, 6.7, 6.15	Patch available	CNA
Linux	Linux	6.15 and later	6.12.114, 6.18.53, 7.2	Patch available	CNA

Linux VendorLinux Affected 6.12.31 to before 6.12.114; 5.15.185 to before 5.16; 6.1.141 to before 6.2; 6.6.93 to before 6.7; 6.14.9 to before 6.15 Fixed in 6.12.114, 5.16, 6.2, 6.7, 6.15 Patch available CNA
Linux VendorLinux Affected 6.15 and later Fixed in 6.12.114, 6.18.53, 7.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	—	—	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.12.114, 5.16, 6.2, 6.7, 6.15
Fix · CNA Linux (Linux) Fixed in 6.12.114, 6.18.53, 7.2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 7 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat OpenShift Container Platform 4
Red Hat OpenShift Container Platform 5

Timeline

2026-10-02 Threatist record created from CVE-2026-97515
2026-10-03 Alias added: GHSA-jcmj-p262-2c6x
2026-10-21 Fix available: Linux/Linux@335f72b1f9bbcf0f4cc5a505443b15f1af563b4f, Linux/[email protected] · CNA
2026-10-21 1 new reference · CNA
2026-11-06 Affected versions changed · Red Hat

References

Other 3

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4

See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences