GHSA-RM7M-CQFW-43RF
Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-11 09:30In the Linux kernel, the following vulnerability has been resolved:
drm/i915: Fix potential overflow of shmem scatterlist length
When a scatterlists table of a GEM shmem object of size 4 GB or more is populated with pages allocated from a folio, unsigned int .length attribute of a scatterlist may get overflowed if total byte length of pages allocated to that single scatterlist happens to reach or cross the 4GB limit. As a consequence, users of the object may suffer from hitting unexpected, premature end of the object's backing pages.
[278.780187] ------------[ cut here ]------------ [278.780377] WARNING: CPU: 1 PID: 2326 at drivers/gpu/drm/i915/i915_mm.c:55 remap_sg+0x199/0x1d0 [i915] ... [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) [278.780656] Tainted: [S]=CPU_OUT_OF_SPEC, [U]=USER [278.780658] Hardware name: Intel Corporation Meteor Lake Client Platform/MTL-P LP5x T3 RVP, BIOS MTLPFWI1.R00.3471.D91.2401310918 01/31/2024 [278.780659] RIP: 0010:remap_sg+0x199/0x1d0 [i915] ... [278.780786] Call Trace: [278.780787] [278.780788] ? __apply_to_page_range+0x3e6/0x910 [278.780795] ? __pfx_remap_sg+0x10/0x10 [i915] [278.780906] apply_to_page_range+0x14/0x30 [278.780908] remap_io_sg+0x14d/0x260 [i915] [278.781013] vm_fault_cpu+0xd2/0x330 [i915] [278.781137] __do_fault+0x3a/0x1b0 [278.781140] do_fault+0x322/0x640 [278.781143] __handle_mm_fault+0x938/0xfd0 [278.781150] handle_mm_fault+0x12c/0x300 [278.781152] ? lock_mm_and_find_vma+0x4b/0x760 [278.781155] do_user_addr_fault+0x2d6/0x8e0 [278.781160] exc_page_fault+0x96/0x2c0 [278.781165] asm_exc_page_fault+0x27/0x30 ...
That issue was apprehended by the author of a change that introduced it, and potential risk even annotated with a comment, but then never addressed.
When adding folio pages to a scatterlist table, take care of byte length of any single scatterlist not exceeding max_segment.
(cherry picked from commit 06249b4e691a75694c014a61708c007fb5755f60)
{
"affected": [],
"aliases": [
"CVE-2026-43368"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-08T15:16:47Z",
"severity": "HIGH"
},
"details": "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\u0027s 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] \u003cTASK\u003e\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)",
"id": "GHSA-rm7m-cqfw-43rf",
"modified": "2026-05-11T09:30:30Z",
"published": "2026-05-08T15:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43368"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/029ae067431ab9d0fca479bdabe780fa436706ea"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1c956f0fccc26fefcbb507516c49d1db41c40471"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/21a301f12d18797bf889c15497f922edfdaece3a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aeb7255531ba4a5c3a64938577170d08b78de399"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eae4bf4107571283031db96ce132e951615e2ae4"
}
],
"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
| 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.