CVE-2025-39710 (GCVE-0-2025-39710)

Vulnerability from cvelistv5 – Published: 2025-09-05 17:21 – Updated: 2026-08-05 12:04
VLAI
Title
media: venus: Add a check for packet size after reading from shared memory
Summary
In the Linux kernel, the following vulnerability has been resolved: media: venus: Add a check for packet size after reading from shared memory Add a check to ensure that the packet size does not exceed the number of available words after reading the packet header from shared memory. This ensures that the size provided by the firmware is safe to process and prevent potential out-of-bounds memory access.
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
Linux Linux Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < 0520c89f6280d2b60ab537d5743601185ee7d8ab (git)
Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < f5b7a943055a4a106d40a03bacd940e28cc1955f (git)
Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < ef09b96665f16f3f0bac4e111160e6f24f1f8791 (git)
Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < 7638bae4539dcebc3f68fda74ac35d73618ec440 (git)
Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < ba567c2e52fbcf0e20502746bdaa79e911c2e8cf (git)
Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < 2d8cea8310a245730816a1fd0c9fa4a5a3bdc68c (git)
Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < f0cbd9386f974d310a0d20a02e4a1323e95ea654 (git)
Affected: d96d3f30c0f2f564f6922bf4ccdf4464992e31fb , < 49befc830daa743e051a65468c05c2ff9e8580e6 (git)
Create a notification for this product.
Linux Linux Affected: 4.13
Unaffected: 0 , < 4.13 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC CN 4100 Affected: 0 , < V5.0 (custom)
Create a notification for this product.
Show details on NVD website
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              "value": "AV:L - The vulnerable path is reached through the Venus V4L2 device node (`/dev/videoN`) \u2014 a local process opens the codec, drives a session with ioctls, and the resulting firmware HFI responses are parsed in the ISR thread. The driver is not bound to any network stack, so exploitation requires local access to the media device.\nAC:L - The condition is simply an HFI message whose header `size` field disagrees with the queue-derived word count, which the message producer fully controls (compromised/misbehaving Venus firmware, the `rd_idx == qsize` wrap edge case, or a shared-memory TOCTOU with the co-processor); no unpredictable memory layout or victim state is required, and the message queue can be pumped repeatedly.\nPR:L - An unprivileged local user needs only access to the venus video device node (video group on Qualcomm Linux boards/Chromebooks, the mediacodec sandbox on Android) to instantiate a session and cause `SESSION_INIT_DONE`/`SYS_INIT_DONE` messages to be parsed; no CAP_SYS_ADMIN or root is involved.\nUI:N - Once a codec session exists, the malformed packet is consumed automatically by `venus_isr_thread()` on the firmware interrupt. No action by any other user is needed.\nS:U - The out-of-bounds access occurs in kernel memory and the impacted component is the same kernel that contains the vulnerable driver; no VM, IOMMU, or sandbox authority boundary is crossed.\nC:H - `hfi_parser()` and `event_seq_changed()` walk up to `hdr-\u003esize` (a full u32, ~4 GB) past the 12 KB `pkt_buf` inside `struct venus_hfi_device`, reading adjacent kernel heap; the harvested bytes are stored into `core-\u003ecaps` (formats, profile/level, capability ranges) and event data that userspace can read back via `VIDIOC_ENUM_FMT`, `QUERY_EXT_CTRL`, and V4L2 events, giving a practical kernel-memory disclosure primitive.\nI:H - The unbounded parse writes attacker-influenced out-of-bounds data into persistent driver state \u2014 codec capability arrays, profile/level tables, and `hfi_buffer_requirements` \u2014 which later drive buffer sizing and control ranges, corrupting kernel state in a way that can cascade into further memory corruption.\nA:H - An oversized `hdr-\u003esize` makes the parser walk far beyond the slab-allocated `venus_hfi_device` into unmapped memory, producing a kernel oops/panic in the interrupt thread; it can be triggered repeatedly by any process able to open the codec device."
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    "datePublished": "2025-09-05T17:21:17.243Z",
    "dateReserved": "2025-04-16T07:20:57.116Z",
    "dateUpdated": "2026-08-05T12:04:45.237Z",
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      "date": "2026-08-11",
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This\\nensures that the size provided by the firmware is safe to process and\\nprevent potential out-of-bounds memory 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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:29:01+00:00",
      "cve": "CVE-2025-39710",
      "id": "CVE-2025-39710",
      "initial_release_date": "2025-09-05T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: media: venus: Add a check for packet size after reading from shared memory",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39710.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T00:41:27Z",
      "cve": "CVE-2025-39710",
      "id": "CVE-2025-39710",
      "initial_release_date": "2025-09-05T23:22:55Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "557",
      "product_status:known_not_affected": "99",
      "product_status:recommended": "500",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-39710",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39710.json",
      "version": "56"
    }
  }
}



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Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.