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CVE-2026-81007— ipmi: ipmb: validate write message length

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： ipmi: ipmb: 校验写入消息长度 在验证长度字节之前，先行读取了消息字段。 零长度或过短的写入操作可能读取到未初始化的栈字节。 若长度值小于 SMBus 头部大小，会导致块写入长度发生下溢（underflow）。 修复措施： 要求缓冲区非空，并满足 IPMB 请求的最小长度要求。 在解析消息前，先要求长度字节加上负载内容完整存在。

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 51bd6f291583684f495ea498984dfc22049d7fd2< 60939bcda6f3f104ef456fdbf3cc5733c0720fb1 affected
51bd6f291583684f495ea498984dfc22049d7fd2< 5719431ca2b5fa26560bb38f6202f8b97fa3bbb0 affected
51bd6f291583684f495ea498984dfc22049d7fd2< a84c6e3d188f2c6e674910929eb790634299d6d5 affected
51bd6f291583684f495ea498984dfc22049d7fd2< 53637506884dbd5c91a89b1a3547d99d80f8ed2c affected
5.3 affected
< 5.3 unaffected
6.12.109≤ 6.12.* unaffected
6.18.50≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-81007

Vulnerability Information
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Vulnerability Title
ipmi: ipmb: validate write message length
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: validate write message length ipmb_write() read message fields before validating the length byte. A zero or short write can read uninitialized stack bytes. A length smaller than the SMBus header underflows the block write length. Require a non-empty buffer and the minimum IPMB request length. Also require the length byte plus payload before parsing the message.
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 51bd6f291583684f495ea498984dfc22049d7fd2 ~ 60939bcda6f3f104ef456fdbf3cc5733c0720fb1 -
Linux Linux 5.3 -

II. Public POCs for CVE-2026-81007

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III. Intelligence Information for CVE-2026-81007

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Patches & Fixes for CVE-2026-81007 (4)

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

CVE-2026-89490 ocfs2: fix readdir position truncation on 32-bit kernels
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-2026-89491 ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin()
CVE-2026-89501 ring-buffer: Hold cpu_buffer::lock when resizing a subbuf
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-2026-89500 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-2026-89502 ring-buffer: Free cpu_buffer::free_page with subbuf_order

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-81007

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