drm/i915: Fix potential overflow of shmem scatterlist length_CVE-2026-43368

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: Fix potential overflow of shmem scatterlist length\n\nWhen a scatterlists table of a GEM shmem object of size 4 GB or more is\npopulated with pages allocated from a folio, unsigned int .length\nattribute of a scatterlist may get overflowed if total byte length of\npages allocated to that single scatterlist happens to reach or cross the\n4GB limit.  As a consequence, users of the object may suffer from hitting\nunexpected, premature end of the object's backing pages.\n\n[278.780187] ------------[ cut here ]------------\n[278.780377] WARNING: CPU: 1 PID: 2326 at drivers/gpu/drm/i915/i915_mm.c:55 remap_sg+0x199/0x1d0 [i915]\n...\n[278.780654] CPU: 1 UID: 0 PID: 2326 Comm: gem_mmap_offset Tainted: G S   U              6.17.0-rc1-CI_DRM_16981-ged823aaa0607+ #1 PREEMPT(voluntary)\n[278.780656] Tainted: [S]=CPU_OUT_OF_SPEC, [U]=USER\n[278.780658] Hardware name: Intel Corporation Meteor Lake Client Platform/MTL-P LP5x T3 RVP, BIOS MTLPFWI1.R00.3471.D91.2401310918 01/31/2024\n[278.780659] RIP: 0010:remap_sg+0x199/0x1d0 [i915]\n...\n[278.780786] Call Trace:\n[278.780787]  <TASK>\n[278.780788]  ? __apply_to_page_range+0x3e6/0x910\n[278.780795]  ? __pfx_remap_sg+0x10/0x10 [i915]\n[278.780906]  apply_to_page_range+0x14/0x30\n[278.780908]  remap_io_sg+0x14d/0x260 [i915]\n[278.781013]  vm_fault_cpu+0xd2/0x330 [i915]\n[278.781137]  __do_fault+0x3a/0x1b0\n[278.781140]  do_fault+0x322/0x640\n[278.781143]  __handle_mm_fault+0x938/0xfd0\n[278.781150]  handle_mm_fault+0x12c/0x300\n[278.781152]  ? lock_mm_and_find_vma+0x4b/0x760\n[278.781155]  do_user_addr_fault+0x2d6/0x8e0\n[278.781160]  exc_page_fault+0x96/0x2c0\n[278.781165]  asm_exc_page_fault+0x27/0x30\n...\n\nThat issue was apprehended by the author of a change that introduced it,\nand potential risk even annotated with a comment, but then never addressed.\n\nWhen adding folio pages to a scatterlist table, take care of byte length\nof any single scatterlist not exceeding max_segment.\n\n(cherry picked from commit 06249b4e691a75694c014a61708c007fb5755f60)",
    "published": "2026-05-08T14:21:20.500Z",
    "modified": "2026-05-11T06:33:46.567Z",
    "type": "cve",
    "title": "drm/i915: Fix potential overflow of shmem scatterlist length",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/aeb7255531ba4a5c3a64938577170d08b78de399\nhttps://git.kernel.org/stable/c/1c956f0fccc26fefcbb507516c49d1db41c40471\nhttps://git.kernel.org/stable/c/eae4bf4107571283031db96ce132e951615e2ae4\nhttps://git.kernel.org/stable/c/21a301f12d18797bf889c15497f922edfdaece3a\nhttps://git.kernel.org/stable/c/029ae067431ab9d0fca479bdabe780fa436706ea",
    "id": "CVE-2026-43368",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 0b62af28f249b9c4036a05acfb053058dc02e2e2\nLinux Linux 0b62af28f249b9c4036a05acfb053058dc02e2e2\nLinux Linux 0b62af28f249b9c4036a05acfb053058dc02e2e2\nLinux Linux 0b62af28f249b9c4036a05acfb053058dc02e2e2\nLinux Linux 0b62af28f249b9c4036a05acfb053058dc02e2e2\nLinux Linux 6.5",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
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            "privilegesRequired": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "0b62af28f249b9c4036a05acfb053058dc02e2e2",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
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    "ai_score": 0
}