{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8fe148d39c127de3fb78dfa6da95a3608dfda454"
            },
            {
              "fixed": "c0b8c148a7754826156993ed6442d31536ec86b4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "ef21187c0672a2b2cbec44f33bab9ec47d5c277c"
            },
            {
              "fixed": "c2e3aadc8fef7da068490597fc5582f8f362aeb2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "c86d26b4b089ca294b3b7d915a7da61edb77935f"
            },
            {
              "fixed": "c74990828d3c486ee44aaa68240eb3abff289d1c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "44e9a3bb76e5f2eecd374c8176b2c5163c8bb2e2"
            },
            {
              "fixed": "517720913bd3c17a52cd55a740064f68455ab88e"
            },
            {
              "fixed": "2a4dc9a0ac3326e79fb58fdaae724b92127709a9"
            },
            {
              "fixed": "77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.120"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.64"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.12.4"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53343.json"
  },
  "details": "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.",
  "id": "CVE-2026-53343",
  "modified": "2026-07-25T03:56:20.058777565Z",
  "published": "2026-07-01T13:32:23.979Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a4dc9a0ac3326e79fb58fdaae724b92127709a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/517720913bd3c17a52cd55a740064f68455ab88e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77a1f6883dc6e837bb2cb30b9b02e2f94338e2c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0b8c148a7754826156993ed6442d31536ec86b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2e3aadc8fef7da068490597fc5582f8f362aeb2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c74990828d3c486ee44aaa68240eb3abff289d1c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53343.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53343"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow"
}