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CVE-2026-89724— media: vicodec: fix out-of-bounds write in FWHT encoder

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： 媒体子系统：vicodec：修复 FWHT 编码器中的越界写入 根据压缩描述符 来确定编码器 CAPTURE 缓冲区的大小，其 的值为 3： 。 会对每个组件编码一个平面；对于不可压缩的平面， 会走 路径，将平面数据原样拷贝。 对于具有 4 个组件的像素格式，所有四个平面均为全分辨率（ ）。如果一帧数据强制所有平面都通过未编码的回退路径处理，则实际写入的字节数为： 字节， 这会超出平面预期的 大小，可能导致相邻的内核堆内存被破坏。 修复方案： 将 从 3 增加到 4，以匹配

AI Predicted 7.5 Difficulty: Moderate

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 16ecf6dff97ce0194a7126e26159492668d47a7e< 84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7 affected
16ecf6dff97ce0194a7126e26159492668d47a7e< 8c14472431e27f13661d0db9d837156eaced0ecb affected
16ecf6dff97ce0194a7126e26159492668d47a7e< b95315ffc66b39856396c1043618bb4e4d5785ba affected
16ecf6dff97ce0194a7126e26159492668d47a7e< cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9 affected
5.0 affected
< 5.0 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-2026-89724

Vulnerability Information
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Vulnerability Title
media: vicodec: fix out-of-bounds write in FWHT encoder
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: vicodec: fix out-of-bounds write in FWHT encoder vidioc_s_fmt_vid_out() sizes the encoder CAPTURE buffer from the compressed descriptor pixfmt_fwht, whose sizeimage_mult is 3: coded_w * coded_h * 3 + sizeof(struct fwht_cframe_hdr). fwht_encode_frame() encodes one plane per component, and an incompressible plane takes the FWHT_FRAME_UNENCODED path in encode_plane(), copying the plane verbatim. For a 4-component pixel format all four planes are full resolution (width_div == height_div == 1), so a frame that forces every plane through the unencoded fallback writes sizeof(struct fwht_cframe_hdr) + 4 * coded_w * coded_h bytes, overrunning the plane by coded_w * coded_h, which can result in corruption of adjacent kernel heap memory. Bump pixfmt_fwht.sizeimage_mult from 3 to 4, matching the largest components_num among the supported raw formats, so the capture buffer is always large enough for the unencoded fallback.
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 16ecf6dff97ce0194a7126e26159492668d47a7e ~ 84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7 -
Linux Linux 5.0 -

II. Public POCs for CVE-2026-89724

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III. Intelligence Information for CVE-2026-89724

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Other References for CVE-2026-89724 (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

V. Comments for CVE-2026-89724

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