GHSA-8652-HHJR-7FH7
Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-28 09:31In the Linux kernel, the following vulnerability has been resolved:
accel/ethosu: fix OOB write in ethosu_gem_cmdstream_copy_and_validate()
The command stream parsing loop increments the index variable a second time when a 64-bit command word is encountered (bit 14 set), but does not re-check the loop bound before writing the second word:
for (i = 0; i < size / 4; i++) {
bocmds[i] = cmds[0];
if (cmd & 0x4000) {
i++;
bocmds[i] = cmds[1]; /* unchecked */
}
}
The buffer bocmds is backed by a DMA allocation of exactly size bytes from drm_gem_dma_create(ddev, size), giving valid indices [0, size/4-1].
When i == size/4 - 1 on entry to an iteration and bit 14 of cmds[0] is set, bocmds[size/4-1] is written in bounds, i is then incremented to size/4, and bocmds[size/4] writes four bytes past the end of the allocation.
Userspace controls both the buffer contents and the size argument via the ioctl, making this a userspace-triggerable heap out-of-bounds write.
Fix by checking the incremented index against the buffer bound before the second write and returning -EINVAL if the buffer is too small to contain the extended command.
{
"affected": [],
"aliases": [
"CVE-2026-53173"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-25T09:16:34Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ethosu: fix OOB write in ethosu_gem_cmdstream_copy_and_validate()\n\nThe command stream parsing loop increments the index variable a second\ntime when a 64-bit command word is encountered (bit 14 set), but does\nnot re-check the loop bound before writing the second word:\n\n for (i = 0; i \u003c size / 4; i++) {\n bocmds[i] = cmds[0];\n if (cmd \u0026 0x4000) {\n i++;\n bocmds[i] = cmds[1]; /* unchecked */\n }\n }\n\nThe buffer bocmds is backed by a DMA allocation of exactly size bytes\nfrom drm_gem_dma_create(ddev, size), giving valid indices [0, size/4-1].\n\nWhen i == size/4 - 1 on entry to an iteration and bit 14 of cmds[0] is\nset, bocmds[size/4-1] is written in bounds, i is then incremented to\nsize/4, and bocmds[size/4] writes four bytes past the end of the\nallocation.\n\nUserspace controls both the buffer contents and the size argument via\nthe ioctl, making this a userspace-triggerable heap out-of-bounds write.\n\nFix by checking the incremented index against the buffer bound before\nthe second write and returning -EINVAL if the buffer is too small to\ncontain the extended command.",
"id": "GHSA-8652-hhjr-7fh7",
"modified": "2026-06-28T09:31:43Z",
"published": "2026-06-25T09:31:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53173"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c0837b9cf6eabbad8b8cbddaff1a46a6d0a2e29d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/db6cb3e35cebf487f9a78ebd4cfa4b83708ff40d"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
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