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CVE-2026-89730— fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write

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： fpga: altera-cvp: 避免在尾部字节写入时发生越界读取 中的尾部字节处理路径在输入缓冲区中仅剩 1–3 个字节时，仍然会对一个 指针进行解引用。如果缓冲区恰好结束于页边界或分散列表（scatterlist）边界，可能会导致读取超出有效镜像数据范围，从而引发故障。 修复方法是：在写入最终字之前，将剩余的字节复制到一个零初始化的 变量中，以确保仅从输入缓冲区读取有效字节。

AI Predicted 5.0 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1595 · Active Scanning

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 34d1dc17ce978ae76e676d401b48fe9d004aa948< b138bc665e21d4422382ab43aebdf0a2b7bb9cb3 affected
34d1dc17ce978ae76e676d401b48fe9d004aa948< 827ec385458adeeda651de2b6f3537e386b1a8d9 affected
34d1dc17ce978ae76e676d401b48fe9d004aa948< 4dc1051939e499c838229af035464a5fc7671198 affected
34d1dc17ce978ae76e676d401b48fe9d004aa948< 9da70a43b5fea60d758137f7f0ccfe19356cb5bb affected
4.14 affected
< 4.14 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-2026-89730

Vulnerability Information
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Vulnerability Title
fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write The trailing byte path in altera_cvp_send_block() dereferences a u32 pointer even when only 1-3 bytes remain in the input buffer. If the buffer ends at a page or scatterlist boundary, this can read past the valid image data and fault. Copy the remaining bytes into a zero-initialized u32 before writing the final word so only valid bytes are read from the input buffer.
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 34d1dc17ce978ae76e676d401b48fe9d004aa948 ~ b138bc665e21d4422382ab43aebdf0a2b7bb9cb3 -
Linux Linux 4.14 -

II. Public POCs for CVE-2026-89730

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III. Intelligence Information for CVE-2026-89730

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Other References for CVE-2026-89730 (4)

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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