CVE-2025-23157 (GCVE-0-2025-23157)
Vulnerability from cvelistv5
Published
2025-05-01 12:55
Modified
2026-08-05 11:57
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: media: venus: hfi_parser: add check to avoid out of bound access There is a possibility that init_codecs is invoked multiple times during manipulated payload from video firmware. In such case, if codecs_count can get incremented to value more than MAX_CODEC_NUM, there can be OOB access. Reset the count so that it always starts from beginning.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
Version: 1a73374a04e555103e5369429a30999114001dda
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: venus: hfi_parser: add check to avoid out of bound access\n\nThere is a possibility that init_codecs is invoked multiple times during\nmanipulated payload from video firmware. In such case, if codecs_count\ncan get incremented to value more than MAX_CODEC_NUM, there can be OOB\naccess. Reset the count so that it always starts from beginning."
        }
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "lang": "en",
              "value": "AV:L - The vulnerable parser is reached through the local V4L2 device nodes (/dev/video*) \u2014 session-init parsing on V1 hardware and core-init parsing after a driver-triggered firmware re-init \u2014 plus the HFI shared-memory queue from the on-die video co-processor; there is no network or physical-bus reachability.\nAC:L - No race and no dependence on uncontrolled memory layout: the attacker either supplies a payload with repeated CODEC_SUPPORTED properties (fully attacker-chosen index and value) or, on HFI_VERSION_1XX where codecs_count is never reset, simply loops session init/deinit until the counter exceeds MAX_CODEC_NUM; the driver is enabled in standard arm64/Android/embedded Qualcomm configurations.\nPR:L - Triggering the session-init parse path only requires opening the venus decoder/encoder node and issuing REQBUFS/STREAMON, which any local user in the video group (desktop uaccess ACL) or any Android app with normal mediacodec access can do \u2014 no root or capability is needed.\nUI:N - The attacker\u0027s own process drives the ioctl sequence and the firmware message handling runs asynchronously in the driver\u0027s IRQ/worker context; no victim action is involved.\nS:U - The out-of-bounds accesses corrupt and disclose kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Overflowing into codecs_count makes venus_caps_by_codec() iterate far past core-\u003ecaps[], and the out-of-bounds hfi_plat_caps contents (formats, profile/levels, capability min/max) are handed back to userspace via V4L2 format and control enumeration, giving a broad kernel memory disclosure; the write primitive further enables leveraged reads.\nI:H - This is an out-of-bounds write with an attacker-controlled index (up to megabytes past a ~30 KB allocation) and attacker-selected power-of-two values, corrupting kernel pointers (core-\u003eroot, core-\u003eocs) and adjacent heap objects \u2014 a classic primitive for control-flow hijack.\nA:H - Corrupting codecs_count to a huge value causes an immediate unbounded scan of kernel memory, and clobbering the adjacent dentry/of_changeset pointers leads to an oops or panic on next use."
            }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/e5133a0b25463674903fdc0528e0a29b7267130e"
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          "url": "https://git.kernel.org/stable/c/2b8b9ea4e26a501eb220ea189e42b4527e65bdfa"
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        {
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        {
          "url": "https://git.kernel.org/stable/c/26bbedd06d85770581fda5d78e78539bb088fad1"
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    "cveId": "CVE-2025-23157",
    "datePublished": "2025-05-01T12:55:43.193Z",
    "dateReserved": "2025-01-11T14:28:41.514Z",
    "dateUpdated": "2026-08-05T11:57:08.273Z",
    "state": "PUBLISHED"
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