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CVE-2026-68228 (GCVE-0-2026-68228)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:00 – Updated: 2026-08-17 05:01
VLAI
Title
media: chips-media: wave5: Move src_buf Removal to finish_encode
Summary
In the Linux kernel, the following vulnerability has been resolved: media: chips-media: wave5: Move src_buf Removal to finish_encode During encoder processing, there is a case where the IRQ response could return the buffer back to userspace via v4l2_m2m_buf_done call. In this time, userspace could queue up this same buffer before start_encode removes the index from the ready queue. This would then lead to a case where the buffer in the ready queue could be a self loop due to the WRITE_ONCE(prev->next, new) call in __list_add. When __list_del is finally called, the loop is already made so nothing points back to ready queue list head and pointers are poisoned. A buffer should not be marked as DONE before the buffer is removed from m2m ready queue. Move removal entirely to finish_encode.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9707a6254a8a6b978bde811a44fe07d86c229d1c , < 1ee2b2b189ddc7b23c8eee1145de42b8bd19fb06 (git)
Affected: 9707a6254a8a6b978bde811a44fe07d86c229d1c , < f24ca8b53fe15db40957bdaa40c9aa68e1557bbe (git)
Affected: 9707a6254a8a6b978bde811a44fe07d86c229d1c , < d681227ce43bfd74b6eb69beecd9b0bec1fd8b48 (git)
Affected: 9707a6254a8a6b978bde811a44fe07d86c229d1c , < b20157147089a9c16a38c7810e2fe6f2df8e3277 (git)
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Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c"
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              "value": "AV:L - The flaw is reached only through V4L2 ioctls (REQBUFS/QBUF/DQBUF/STREAMON) on the local Wave5 encoder device node /dev/videoX; no network or remote input path exists.\nAC:L - Although a race, the attacker controls both sides: it drives the QBUF timing against the encode-completion IRQ and can retry on every encoded frame in a tight loop until the window is hit, so triggering is reliable.\nPR:L - An unprivileged local process that can open the encoder video node (normal on Android/embedded TI platforms where media apps hold access, or any user in the video group) can drive the full encode sequence; no capabilities are checked.\nUI:N - The attacking process performs all encode setup and buffer queueing itself; no action by another user or victim is needed.\nS:U - Corruption is confined to kernel memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The m2m ready-queue list corruption plus a vb2 buffer simultaneously owned by userspace and the driver yields dangling/poisoned kernel pointers and buffer state confusion that can be leveraged to read kernel memory contents.\nI:H - Doubly-linked list corruption gives an attacker-influenced write through list_add/list_del on a self-looped node, and a freed-then-reused buffer object, both of which are classic primitives for controlled kernel memory modification.\nA:H - The self-loop and subsequent __list_del leave the ready queue head detached with poisoned pointers, causing LIST_POISON dereference oops, unterminated list traversal, or a use-after-free crash that takes down the kernel."
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        "dateUpdated": "2026-08-17T05:01:16.349Z",
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    "datePublished": "2026-08-10T12:00:50.892Z",
    "dateReserved": "2026-07-30T09:28:09.376Z",
    "dateUpdated": "2026-08-17T05:01:16.349Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-31T11:19:15+00:00",
      "cve": "CVE-2026-68228",
      "id": "CVE-2026-68228",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: media: chips-media: wave5: Move src_buf Removal to finish_encode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68228.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-18T23:47:54Z",
      "cve": "CVE-2026-68228",
      "id": "CVE-2026-68228",
      "initial_release_date": "2026-08-18T23:47:54Z",
      "product_status:known_affected": "65",
      "product_status:known_not_affected": "231",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68228",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68228.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.