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CVE-2026-98204— Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()

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： 输入子系统：rmi_smbus - 修复 rmi_smb_write_block() 中的越界读取问题 在 rmi_smb_write_block() 函数中将写入数据分块为 SMBus 块时，循环使用原始总长度（len）而非剩余长度（cur_len）来计算块长度（block_len）。 当 len 大于 32 字节（SMB_MAX_COUNT）时，block_len 在每次迭代中始终保持为 32，即使在最后一个部分块中剩余字节数不足 32 字节的情况下也是如此。这导致

AI Predicted 6.5 Difficulty: Easy EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 82264d0cf7aef2247563c031ff2ab96579d5d0cc< d01337c0892d1509500c727edf81380777c2dd0f affected
82264d0cf7aef2247563c031ff2ab96579d5d0cc< 7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8 affected
82264d0cf7aef2247563c031ff2ab96579d5d0cc< 29fbcf5834f0a7f74bfd017c07da2411b35a4e2a affected
82264d0cf7aef2247563c031ff2ab96579d5d0cc< 50dd585bee7669eb165e5defcc35d17f3822cfbb affected
82264d0cf7aef2247563c031ff2ab96579d5d0cc< e022538e13dd1c82af5ec25ac28f12ca0ab26160 affected
82264d0cf7aef2247563c031ff2ab96579d5d0cc< dc05ec97b8299e48e31367a9bc412c7e9c0e2b42 affected
82264d0cf7aef2247563c031ff2ab96579d5d0cc< 9f0ce5e162eed8b68345abe839c59768bc60f99a affected
82264d0cf7aef2247563c031ff2ab96579d5d0cc< 51cfe54f815ae175c7d1126b983d4d7c89715004 affected
… +10 more rows
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I. Basic Information for CVE-2026-98204

Vulnerability Information
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Vulnerability Title
Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block() When chunking writes into SMBus blocks in rmi_smb_write_block(), the loop calculates block_len using the original total length (len) instead of the remaining length (cur_len). If len is greater than 32 bytes (SMB_MAX_COUNT), block_len remains 32 for every iteration, even on the final partial chunk where fewer than 32 bytes remain. This causes smb_block_write() to read 32 bytes from the advanced data buffer pointer, reading past the end of the input buffer. Fix this by calculating block_len using cur_len and advancing the buffer and address pointers by block_len.
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 82264d0cf7aef2247563c031ff2ab96579d5d0cc ~ d01337c0892d1509500c727edf81380777c2dd0f -
Linux Linux 4.10 -

II. Public POCs for CVE-2026-98204

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III. Intelligence Information for CVE-2026-98204

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Patches & Fixes for CVE-2026-98204 (8)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98324 7.8 HIGH dmaengine: pxa: fix double counting of the hw descriptors
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list
CVE-2026-98254 7.8 HIGH swiotlb: use the adjusted address for the highmem page lookup

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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