CVE-2026-43109 (GCVE-0-2026-43109)
Vulnerability from cvelistv5
Published
2026-05-06 07:40
Modified
2026-05-17 15:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: x86: shadow stacks: proper error handling for mmap lock 김영민 reports that shstk_pop_sigframe() doesn't check for errors from mmap_read_lock_killable(), which is a silly oversight, and also shows that we haven't marked those functions with "__must_check", which would have immediately caught it. So let's fix both issues.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7fad2a432cd35bbf104d2d9d426e74902f22aa95
Version: 7fad2a432cd35bbf104d2d9d426e74902f22aa95
Version: 7fad2a432cd35bbf104d2d9d426e74902f22aa95
Version: 7fad2a432cd35bbf104d2d9d426e74902f22aa95
Version: 7fad2a432cd35bbf104d2d9d426e74902f22aa95
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/shstk.c",
            "include/linux/mmap_lock.h"
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86: shadow stacks: proper error handling for mmap lock\n\n\uae40\uc601\ubbfc reports that shstk_pop_sigframe() doesn\u0027t check for errors from\nmmap_read_lock_killable(), which is a silly oversight, and also shows\nthat we haven\u0027t marked those functions with \"__must_check\", which would\nhave immediately caught it.\n\nSo let\u0027s fix both issues."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-17T15:21:37.731Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6"
        },
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          "url": "https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0"
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      ],
      "title": "x86: shadow stacks: proper error handling for mmap lock",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43109",
    "datePublished": "2026-05-06T07:40:36.532Z",
    "dateReserved": "2026-05-01T14:12:55.986Z",
    "dateUpdated": "2026-05-17T15:21:37.731Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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