{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53343", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.399Z", "datePublished": "2026-07-01T13:32:23.979Z", "dateUpdated": "2026-07-01T13:32:23.979Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-01T13:32:23.979Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm/kernel/entry-armv.S"], "versions": [{"version": "8fe148d39c127de3fb78dfa6da95a3608dfda454", "lessThan": "c0b8c148a7754826156993ed6442d31536ec86b4", "status": "affected", "versionType": "git"}, {"version": "ef21187c0672a2b2cbec44f33bab9ec47d5c277c", "lessThan": "c2e3aadc8fef7da068490597fc5582f8f362aeb2", "status": "affected", "versionType": "git"}, {"version": "c86d26b4b089ca294b3b7d915a7da61edb77935f", "lessThan": "c74990828d3c486ee44aaa68240eb3abff289d1c", "status": "affected", "versionType": "git"}, {"version": "44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2", "lessThan": "517720913bd3c17a52cd55a740064f68455ab88e", "status": "affected", "versionType": "git"}, {"version": "44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2", "lessThan": "2a4dc9a0ac3326e79fb58fdaae724b92127709a9", "status": "affected", "versionType": "git"}, {"version": "44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2", "lessThan": "77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6", "status": "affected", "versionType": "git"}, {"version": "6.1.120", "lessThan": "6.1.176", "status": "affected", "versionType": "semver"}, {"version": "6.6.64", "lessThan": "6.6.143", "status": "affected", "versionType": "semver"}, {"version": "6.12.4", "lessThan": "6.12.94", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm/kernel/entry-armv.S"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.120", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.64", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.4", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.1"}]}]}], "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"}}}}

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