FKIE_CVE-2026-98388

Vulnerability from fkie_nvd - Published: 2026-10-14 14:17 - Updated: 2026-10-19 10:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: exec: do_close_on_exec() before taking exec_update_lock do_close_on_exec() currently happens while holding the exec_update_lock, which is used in a lot of places that access process state to synchronize access checks. I recently added another such use of exec_update_lock, causing a regression. do_close_on_exec() can block waiting for a reply from a filesystem. That means a hung filesystem can block codepaths that use exec_update_lock; and it also means that a FUSE filesystem which attempts to inspect the calling process can deadlock. To avoid such problems, move do_close_on_exec() before the exec_update_lock is taken, but after the FD table has been copied if necessary. I have looked through all the calls between the old and new position of the do_close_on_exec() call; there seems to be no file descriptor table access in between.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/exec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "955973fff4a36d39a848b00cac1706863f568fe1",
              "status": "affected",
              "version": "ae1e630bcaac739f625822078edbaea98366930d",
              "versionType": "git"
            },
            {
              "lessThan": "550feab5b01000ab314868b62211fb3ddfd600e8",
              "status": "affected",
              "version": "d54f14655fd7d7b293698a8b6918563c4c0465e7",
              "versionType": "git"
            },
            {
              "lessThan": "5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38",
              "status": "affected",
              "version": "bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9",
              "versionType": "git"
            },
            {
              "lessThan": "3feb4020bfb7ccf0d347f27051639d25e19cd65d",
              "status": "affected",
              "version": "7456ae990a9738962b33146916fabca62ae3d4e0",
              "versionType": "git"
            },
            {
              "lessThan": "0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53",
              "status": "affected",
              "version": "4bfe8c481846cee52473a2f7d7b30ee8e6749fc4",
              "versionType": "git"
            },
            {
              "lessThan": "19ddef61ee0a49782a60f8f497e50597ad5de2da",
              "status": "affected",
              "version": "f9b4b03ccc9c69bf7f7298d4559906ebea7143b3",
              "versionType": "git"
            },
            {
              "lessThan": "63be3d8511bdafa095cd14a393cbf3c58dbbb928",
              "status": "affected",
              "version": "6650527444dadc63d84aa939d14ecba4fadb2f69",
              "versionType": "git"
            },
            {
              "lessThan": "e780259b54e618ceb4763fbc21314acf3565e813",
              "status": "affected",
              "version": "6650527444dadc63d84aa939d14ecba4fadb2f69",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c1cfd63326f5d09999134e9052c353faf738286e",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.271",
              "status": "affected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.222",
              "status": "affected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.189",
              "status": "affected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.158",
              "status": "affected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.111",
              "status": "affected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.53",
              "status": "affected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThan": "7.2",
              "status": "affected",
              "version": "7.1.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/exec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.2"
            },
            {
              "lessThan": "7.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexec: do_close_on_exec() before taking exec_update_lock\n\ndo_close_on_exec() currently happens while holding the exec_update_lock,\nwhich is used in a lot of places that access process state to\nsynchronize access checks.\nI recently added another such use of exec_update_lock, causing a\nregression.\n\ndo_close_on_exec() can block waiting for a reply from a filesystem.\nThat means a hung filesystem can block codepaths that use\nexec_update_lock; and it also means that a FUSE filesystem which\nattempts to inspect the calling process can deadlock.\n\nTo avoid such problems, move do_close_on_exec() before the\nexec_update_lock is taken, but after the FD table has been copied if\nnecessary.\n\nI have looked through all the calls between the old and new position of\nthe do_close_on_exec() call; there seems to be no file descriptor table\naccess in between."
    }
  ],
  "id": "CVE-2026-98388",
  "lastModified": "2026-10-19T10:18:42.120",
  "metrics": {},
  "published": "2026-10-14T14:17:49.617",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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