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CVE-2026-89728— i3c: renesas: Fix out-of-bounds access for newdevs mask

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： i3c: renesas: 修复 newdevs 掩码的越界访问 当软件发起 DAA（动态地址分配）时，控制器会通过 NRSPQP（正常响应队列端口寄存器）上报结果。 响应描述符中的数据长度字段（可通过 NRSPQP 寄存器访问）指示了 DAA 完成后剩余的设备数量。因此，当 I3C 总线为空时，该字段的值等于控制器支持的最大设备数（对于瑞萨 I3C 控制器为 8）。 通过调整计算新发现设备位掩码（newdevs mask）的条件，防止在 I3C 总线为空时发生越界访问

AI Predicted 5.5 Difficulty: Moderate

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux e7218986319b4e903dfb4642dcbd1087cf16aaec< 769f5a233efcf8587f70fb2244a202d88582c746 affected
e7218986319b4e903dfb4642dcbd1087cf16aaec< 50dec95c9d1f1f82819bc898ef2b60fa83fd4ccd affected
7.0 affected
< 7.0 unaffected
7.2.4≤ 7.2.* unaffected
7.3-rc1≤ * unaffected
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I. Basic Information for CVE-2026-89728

Vulnerability Information
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Vulnerability Title
i3c: renesas: Fix out-of-bounds access for newdevs mask
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: i3c: renesas: Fix out-of-bounds access for newdevs mask When software initiates DAA (Dynamic Address Assignment), the controller reports the result via the NRSPQP (Normal Response Queue Port Register). The data length field of the response descriptor, which is accessible through the NRSPQP register, indicates the number of devices remaining after DAA. Consequently, when the bus is empty, this field contains the maximum number of devices supported by the controller (8 for the Renesas I3C controller). Adjust the condition that computes the newly discovered devices bitmask to prevent an out-of-bounds when the I3C bus is empty.
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 e7218986319b4e903dfb4642dcbd1087cf16aaec ~ 769f5a233efcf8587f70fb2244a202d88582c746 -
Linux Linux 7.0 -

II. Public POCs for CVE-2026-89728

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III. Intelligence Information for CVE-2026-89728

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Other References for CVE-2026-89728 (2)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89491 ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin()
CVE-2026-89477 sctp: fix NULL deref on untransmitted RECONF completion
CVE-2026-89478 sctp: drop a chunk if its transport was removed
CVE-2026-89479 sctp: stop processing a packet once its association is deleted
CVE-2026-89480 nvme-tcp: reject a read that transferred too few bytes
CVE-2026-89482 nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89481 nvme-tcp: fix host memory disclosure on R2T for a read command
CVE-2026-89483 nvme: zero the discard fallback page
CVE-2026-89484 lockd: fix NULL dereference on lockowner allocation failure
CVE-2026-89485 lockd: pin next file across nlm_inspect_file lock-drop
CVE-2026-89486 ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user()
CVE-2026-89487 openvswitch: only skb_tx_error() a packet we are about to drop
CVE-2026-89488 openvswitch: Fix CT limit teardown use-after-free
CVE-2026-89489 openrisc: fix arbitrary kernel memory access via or1k_atomic syscall
CVE-2026-89500 ring-buffer: Make cpu_buffer::free_page a buffer_data_read_page
CVE-2026-89497 orangefs: skip leading spaces before parsing client debug masks
CVE-2026-89498 orangefs: fix double-free of trailer_buf on readdir copy failure
CVE-2026-89499 ring-buffer: Stop remote reader update when page swap fails
CVE-2026-89496 ocfs2: always run deallocs on copy-on-write completion
CVE-2026-89501 ring-buffer: Hold cpu_buffer::lock when resizing a subbuf

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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