{"id":52890,"date":"2026-05-11T04:10:37","date_gmt":"2026-05-11T04:10:37","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=52890"},"modified":"2026-05-11T04:10:37","modified_gmt":"2026-05-11T04:10:37","slug":"drmi915-fix-potential-overflow-of-shmem-scatterlist-length","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=52890","title":{"rendered":"drm\/i915: Fix potential overflow of shmem scatterlist length_CVE-2026-43368"},"content":{"rendered":"

{“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] \\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)”,”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,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Linux”,”version”:”0b62af28f249b9c4036a05acfb053058dc02e2e2″,”vendor”:”Linux”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"

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