{"cve":{"cve_id":"CVE-2026-53288","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: Reserve an extra page for early kernel mapping\n\nThe final part of [data, end) segment may overflow into the next page of\ninit_pg_end[1] which is the gap page before early_init_stack[2]:\n\n[1]\ncrash_arm64_v9.0.1> vtop ffffffed00601000\nVIRTUAL           PHYSICAL\nffffffed00601000  83401000\n\nPAGE DIRECTORY: ffffffecffd62000\n   PGD: ffffffecffd62da0 => 10000000833fb003\n   PMD: ffffff80033fb018 => 10000000833fe003\n   PTE: ffffff80033fe008 => 68000083401f03\n  PAGE: 83401000\n\n     PTE        PHYSICAL  FLAGS\n68000083401f03  83401000  (VALID|SHARED|AF|NG|PXN|UXN)\n\n      PAGE       PHYSICAL      MAPPING       INDEX CNT FLAGS\nfffffffec00d0040 83401000                0        0  1 4000 reserved\n\n[2]\nffffffed002c8000 (r) __pi__data\nffffffed0054e000 (d) __pi___bss_start\nffffffed005f5000 (b) __pi_init_pg_dir\nffffffed005fe000 (b) __pi_init_pg_end\nffffffed005ff000 (B) early_init_stack\nffffffed00608000 (b) __pi__end\n\nFor 4K pages, the early kernel mapping may use 2MB block entries but the\nkernel segments are only 64KB aligned. Segment boundaries that fall\nwithin a 2MB block therefore require a PTE table so that different\nattributes can be applied on either side of the boundary.\n\nKERNEL_SEGMENT_COUNT still correctly counts the five permanent kernel\nVMAs registered by declare_kernel_vmas(). However, since commit\n5973a62efa34 (\"arm64: map [_text, _stext) virtual address range\nnon-executable+read-only\"), the early mapper also maps [_text, _stext)\nseparately from [_stext, _etext). This adds one more early-only split\nand can require one more page-table page than the existing\nEARLY_SEGMENT_EXTRA_PAGES allowance reserves.\n\nIncrease the 4K-page early mapping allowance by one page to cover that\nadditional split.\n\n[catalin.marinas@arm.com: rewrote part of the commit log]\n[catalin.marinas@arm.com: expanded the code comment]","published_at":"2026-06-26T19:40:48.528000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/a4ff33053da0a34b14abb5c96dc5a48379e26fce","https://git.kernel.org/stable/c/dcb89deed40ba55ff7020061712fdabf098cc2cc","https://git.kernel.org/stable/c/9fe9e3acaa14921b0cf0d6cc2de5b562499bf721","https://git.kernel.org/stable/c/4d8e74ad4585672489da6145b3328d415f50db82"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:52.348775Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"fdd380a5950503a07aaaf74536a0c2f223475eb0","version_start_inclusive":true,"version_end":"a4ff33053da0a34b14abb5c96dc5a48379e26fce","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:fdd380a5950503a07aaaf74536a0c2f223475eb0:a4ff33053da0a34b14abb5c96dc5a48379e26fce"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5973a62efa34c80c9a4e5eac1fca6f6209b902af","version_start_inclusive":true,"version_end":"dcb89deed40ba55ff7020061712fdabf098cc2cc","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5973a62efa34c80c9a4e5eac1fca6f6209b902af:dcb89deed40ba55ff7020061712fdabf098cc2cc"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5973a62efa34c80c9a4e5eac1fca6f6209b902af","version_start_inclusive":true,"version_end":"9fe9e3acaa14921b0cf0d6cc2de5b562499bf721","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5973a62efa34c80c9a4e5eac1fca6f6209b902af:9fe9e3acaa14921b0cf0d6cc2de5b562499bf721"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5973a62efa34c80c9a4e5eac1fca6f6209b902af","version_start_inclusive":true,"version_end":"4d8e74ad4585672489da6145b3328d415f50db82","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5973a62efa34c80c9a4e5eac1fca6f6209b902af:4d8e74ad4585672489da6145b3328d415f50db82"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"88025faf2aa08c7468d68d8cb31a53b55aae6ee0","version_start_inclusive":true,"version_end":"88025faf2aa08c7468d68d8cb31a53b55aae6ee0","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:88025faf2aa08c7468d68d8cb31a53b55aae6ee0:88025faf2aa08c7468d68d8cb31a53b55aae6ee0"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.54","version_start_inclusive":true,"version_end":"6.12.91","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6.12.54:6.12.91"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.17.4","version_start_inclusive":true,"version_end":"6.18","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6.17.4:6.18"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18","version_start_inclusive":true,"version_end":"6.18","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18:6.18"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.18","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.18"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/a4ff33053da0a34b14abb5c96dc5a48379e26fce","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/dcb89deed40ba55ff7020061712fdabf098cc2cc","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/9fe9e3acaa14921b0cf0d6cc2de5b562499bf721","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/4d8e74ad4585672489da6145b3328d415f50db82","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-26T19:40:48.528000Z","label":"CVE published","source":null}]}