{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7fad2a432cd35bbf104d2d9d426e74902f22aa95"
            },
            {
              "fixed": "c79cf42321600e931933e11f94aba8b245d4cd66"
            },
            {
              "fixed": "1a30468eff661937d978495644d2e5ebfeef5ce6"
            },
            {
              "fixed": "c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"
            },
            {
              "fixed": "262b6d38a81d51b135db81e1f30c13d30e38feee"
            },
            {
              "fixed": "52f657e34d7b21b47434d9d8b26fa7f6778b63a0"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.6.0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43109.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86: shadow stacks: proper error handling for mmap lock\n\n김영민 reports that shstk_pop_sigframe() doesn't check for errors from\nmmap_read_lock_killable(), which is a silly oversight, and also shows\nthat we haven't marked those functions with \"__must_check\", which would\nhave immediately caught it.\n\nSo let's fix both issues.",
  "id": "CVE-2026-43109",
  "modified": "2026-07-15T01:49:17.028181138Z",
  "published": "2026-05-06T07:40:36.532Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43109.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43109"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "x86: shadow stacks: proper error handling for mmap lock"
}