{"id":"CVE-2026-43368","revision":"d16641955c7a405fb02c0ea081ebb5e3","records":[{"revision":"d16641955c7a405fb02c0ea081ebb5e3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43368","aliases":[],"title":"drm/i915: Fix potential overflow of shmem scatterlist length","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] \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)","state":0,"publishedAt":"2026-05-08T14:21:20.5+00:00","modifiedAt":"2026-10-19T19:16:27.757+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/gpu/drm/i915/gem/i915_gem_shmem.c\"\n ],\n \"versions\": [\n {\n \"version\": \"0b62af28f249b9c4036a05acfb053058dc02e2e2\",\n \"lessThan\": \"aeb7255531ba4a5c3a64938577170d08b78de399\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0b62af28f249b9c4036a05acfb053058dc02e2e2\",\n \"lessThan\": \"1c956f0fccc26fefcbb507516c49d1db41c40471\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0b62af28f249b9c4036a05acfb053058dc02e2e2\",\n \"lessThan\": \"eae4bf4107571283031db96ce132e951615e2ae4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0b62af28f249b9c4036a05acfb053058dc02e2e2\",\n \"lessThan\": \"21a301f12d18797bf889c15497f922edfdaece3a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0b62af28f249b9c4036a05acfb053058dc02e2e2\",\n \"lessThan\": \"029ae067431ab9d0fca479bdabe780fa436706ea\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/gpu/drm/i915/gem/i915_gem_shmem.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.5\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.5\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.130\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.78\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.19\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.9\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/aeb7255531ba4a5c3a64938577170d08b78de399","https://git.kernel.org/stable/c/1c956f0fccc26fefcbb507516c49d1db41c40471","https://git.kernel.org/stable/c/eae4bf4107571283031db96ce132e951615e2ae4","https://git.kernel.org/stable/c/21a301f12d18797bf889c15497f922edfdaece3a","https://git.kernel.org/stable/c/029ae067431ab9d0fca479bdabe780fa436706ea"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43368","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43368","identifiers":["CVE-2026-43368"]},"retained":false,"historicalAffected":[]}],"coverage":[]}