{"api_version":"1","generated_at":"2026-07-12T16:32:41+00:00","cve":"CVE-2026-53343","urls":{"html":"https://cve.report/CVE-2026-53343","api":"https://cve.report/api/cve/CVE-2026-53343.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53343","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53343"},"summary":{"title":"ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow\n\nCommit 44e9a3bb76e5 (\"ARM: 9430/1: entry: Do a dummy read from\nVMAP shadow\") added a dummy read from the KASAN VMAP stack shadow in\n__switch_to(). The read uses ldr, but the KASAN shadow address is\nbyte-granular and is not guaranteed to be word aligned.\n\nARMv5 faults unaligned word loads. With CONFIG_KASAN_VMALLOC and\nCONFIG_VMAP_STACK enabled, ARM926/VersatilePB crashes in __switch_to()\nwith an alignment exception before reaching init.\n\nUse ldrb for the dummy shadow access. The code only needs to fault in the\nshadow mapping if the stack shadow is missing, so a byte load is sufficient\nand matches the granularity of KASAN shadow memory.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-01 14:16:42","updated_at":"2026-07-01 14:16:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c2e3aadc8fef7da068490597fc5582f8f362aeb2","name":"https://git.kernel.org/stable/c/c2e3aadc8fef7da068490597fc5582f8f362aeb2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6","name":"https://git.kernel.org/stable/c/77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/517720913bd3c17a52cd55a740064f68455ab88e","name":"https://git.kernel.org/stable/c/517720913bd3c17a52cd55a740064f68455ab88e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c0b8c148a7754826156993ed6442d31536ec86b4","name":"https://git.kernel.org/stable/c/c0b8c148a7754826156993ed6442d31536ec86b4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c74990828d3c486ee44aaa68240eb3abff289d1c","name":"https://git.kernel.org/stable/c/c74990828d3c486ee44aaa68240eb3abff289d1c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a4dc9a0ac3326e79fb58fdaae724b92127709a9","name":"https://git.kernel.org/stable/c/2a4dc9a0ac3326e79fb58fdaae724b92127709a9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53343","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53343","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8fe148d39c127de3fb78dfa6da95a3608dfda454 c0b8c148a7754826156993ed6442d31536ec86b4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ef21187c0672a2b2cbec44f33bab9ec47d5c277c c2e3aadc8fef7da068490597fc5582f8f362aeb2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c86d26b4b089ca294b3b7d915a7da61edb77935f c74990828d3c486ee44aaa68240eb3abff289d1c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2 517720913bd3c17a52cd55a740064f68455ab88e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2 2a4dc9a0ac3326e79fb58fdaae724b92127709a9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2 77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.120 6.1.176 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.64 6.6.143 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.4 6.12.94 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.94 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.36 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.13 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53343","cve":"CVE-2026-53343","epss":"0.001610000","percentile":"0.055960000","score_date":"2026-07-04","updated_at":"2026-07-05 00:02:27"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm/kernel/entry-armv.S"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c0b8c148a7754826156993ed6442d31536ec86b4","status":"affected","version":"8fe148d39c127de3fb78dfa6da95a3608dfda454","versionType":"git"},{"lessThan":"c2e3aadc8fef7da068490597fc5582f8f362aeb2","status":"affected","version":"ef21187c0672a2b2cbec44f33bab9ec47d5c277c","versionType":"git"},{"lessThan":"c74990828d3c486ee44aaa68240eb3abff289d1c","status":"affected","version":"c86d26b4b089ca294b3b7d915a7da61edb77935f","versionType":"git"},{"lessThan":"517720913bd3c17a52cd55a740064f68455ab88e","status":"affected","version":"44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2","versionType":"git"},{"lessThan":"2a4dc9a0ac3326e79fb58fdaae724b92127709a9","status":"affected","version":"44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2","versionType":"git"},{"lessThan":"77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6","status":"affected","version":"44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2","versionType":"git"},{"lessThan":"6.1.176","status":"affected","version":"6.1.120","versionType":"semver"},{"lessThan":"6.6.143","status":"affected","version":"6.6.64","versionType":"semver"},{"lessThan":"6.12.94","status":"affected","version":"6.12.4","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm/kernel/entry-armv.S"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.13"},{"lessThan":"6.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.94","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.36","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"6.1.120","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"6.6.64","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.94","versionStartIncluding":"6.12.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.36","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.13","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow\n\nCommit 44e9a3bb76e5 (\"ARM: 9430/1: entry: Do a dummy read from\nVMAP shadow\") added a dummy read from the KASAN VMAP stack shadow in\n__switch_to(). The read uses ldr, but the KASAN shadow address is\nbyte-granular and is not guaranteed to be word aligned.\n\nARMv5 faults unaligned word loads. With CONFIG_KASAN_VMALLOC and\nCONFIG_VMAP_STACK enabled, ARM926/VersatilePB crashes in __switch_to()\nwith an alignment exception before reaching init.\n\nUse ldrb for the dummy shadow access. The code only needs to fault in the\nshadow mapping if the stack shadow is missing, so a byte load is sufficient\nand matches the granularity of KASAN shadow memory."}],"providerMetadata":{"dateUpdated":"2026-07-01T13:32:23.979Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c0b8c148a7754826156993ed6442d31536ec86b4"},{"url":"https://git.kernel.org/stable/c/c2e3aadc8fef7da068490597fc5582f8f362aeb2"},{"url":"https://git.kernel.org/stable/c/c74990828d3c486ee44aaa68240eb3abff289d1c"},{"url":"https://git.kernel.org/stable/c/517720913bd3c17a52cd55a740064f68455ab88e"},{"url":"https://git.kernel.org/stable/c/2a4dc9a0ac3326e79fb58fdaae724b92127709a9"},{"url":"https://git.kernel.org/stable/c/77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6"}],"title":"ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53343","datePublished":"2026-07-01T13:32:23.979Z","dateReserved":"2026-06-09T07:44:35.399Z","dateUpdated":"2026-07-01T13:32:23.979Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-01 14:16:42","lastModifiedDate":"2026-07-01 14:16:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53343","Ordinal":"1","Title":"ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow","CVE":"CVE-2026-53343","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53343","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow\n\nCommit 44e9a3bb76e5 (\"ARM: 9430/1: entry: Do a dummy read from\nVMAP shadow\") added a dummy read from the KASAN VMAP stack shadow in\n__switch_to(). The read uses ldr, but the KASAN shadow address is\nbyte-granular and is not guaranteed to be word aligned.\n\nARMv5 faults unaligned word loads. With CONFIG_KASAN_VMALLOC and\nCONFIG_VMAP_STACK enabled, ARM926/VersatilePB crashes in __switch_to()\nwith an alignment exception before reaching init.\n\nUse ldrb for the dummy shadow access. The code only needs to fault in the\nshadow mapping if the stack shadow is missing, so a byte load is sufficient\nand matches the granularity of KASAN shadow memory.","Type":"Description","Title":"ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow"}]}}}