CVE-2026-98388 (GCVE-0-2026-98388)

Vulnerability from cvelistv5 – Published: 2026-10-14 13:25 – Updated: 2026-10-19 09:18
VLAI
Title
exec: do_close_on_exec() before taking exec_update_lock
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6843 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ae1e630bcaac739f625822078edbaea98366930d , < 955973fff4a36d39a848b00cac1706863f568fe1 (git)
Affected: d54f14655fd7d7b293698a8b6918563c4c0465e7 , < 550feab5b01000ab314868b62211fb3ddfd600e8 (git)
Affected: bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 , < 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38 (git)
Affected: 7456ae990a9738962b33146916fabca62ae3d4e0 , < 3feb4020bfb7ccf0d347f27051639d25e19cd65d (git)
Affected: 4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 , < 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53 (git)
Affected: f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 , < 19ddef61ee0a49782a60f8f497e50597ad5de2da (git)
Affected: 6650527444dadc63d84aa939d14ecba4fadb2f69 , < 63be3d8511bdafa095cd14a393cbf3c58dbbb928 (git)
Affected: 6650527444dadc63d84aa939d14ecba4fadb2f69 , < e780259b54e618ceb4763fbc21314acf3565e813 (git)
Affected: c1cfd63326f5d09999134e9052c353faf738286e (git)
Affected: 5.10.261 , < 5.10.271 (semver)
Affected: 5.15.212 , < 5.15.222 (semver)
Affected: 6.1.178 , < 6.1.189 (semver)
Affected: 6.6.145 , < 6.6.158 (semver)
Affected: 6.12.97 , < 6.12.111 (semver)
Affected: 6.18.40 , < 6.18.53 (semver)
Affected: 7.1.4 , < 7.2 (semver)
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Linux Linux Affected: 7.2
Unaffected: 0 , < 7.2 (semver)
Unaffected: 5.10.271 , ≤ 5.10.* (semver)
Unaffected: 5.15.222 , ≤ 5.15.* (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "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",
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          },
          {
            "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"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-18T08:29:11+00:00",
      "cve": "CVE-2026-98388",
      "id": "CVE-2026-98388",
      "initial_release_date": "2026-10-14T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "263",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: exec: do_close_on_exec() before taking exec_update_lock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98388.json",
      "version": "3"
    }
  }
}



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