CVE-2026-68146

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: ftrace: Add global mutex to serialize trace_parser access In ftrace, the trace_parser structure is allocated and initialized when a trace file is opened, and is subsequently used across write and release handlers to parse user input. The affected handler paths and their specific functions are: - Open paths: ftrace_regex_open(), ftrace_graph_open() - Write paths: ftrace_regex_write(), ftrace_graph_write() - Release paths: ftrace_regex_release(), ftrace_graph_release() If userspace opens a trace file descriptor and shares it across multiple threads, concurrent write calls will race on the parser's internal state, specifically the 'idx', 'cont', and 'buffer' fields, leading to corrupted input or undefined behavior. Fix this by adding a global mutex, parser_lock, to serialize all access to trace_parser across write and release paths, preventing concurrent corruption of parser state.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-08-10 13:20:00.470000

Last modified

2026-11-06 17:19:19.893000

View original CVE JSON

{
  "id": "CVE-2026-68146",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-08-10T13:20:00.470",
  "lastModified": "2026-11-06T17:19:19.893",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Add global mutex to serialize trace_parser access\n\nIn ftrace, the trace_parser structure is allocated and initialized when\na trace file is opened, and is subsequently used across write and release\nhandlers to parse user input.\n\nThe affected handler paths and their specific functions are:\n  - Open paths: ftrace_regex_open(), ftrace_graph_open()\n  - Write paths: ftrace_regex_write(), ftrace_graph_write()\n  - Release paths: ftrace_regex_release(), ftrace_graph_release()\n\nIf userspace opens a trace file descriptor and shares it across multiple\nthreads, concurrent write calls will race on the parser's internal state,\nspecifically the 'idx', 'cont', and 'buffer' fields, leading to corrupted\ninput or undefined behavior.\n\nFix this by adding a global mutex, parser_lock, to serialize all access\nto trace_parser across write and release paths, preventing concurrent\ncorruption of parser state."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "kernel/trace/ftrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "a29bc20ea5f0cb79c6287f2c6182c5eeb8e6c01f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "db76744d588086695371ecdd982694395628ba48",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "1474fe4453505b6be720b5bb94be1c927de3314a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "3d0dd138a06c782f8b755cd1b6f9909494514ce1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "90be137813e1a5bdfd671e40fe28004fb959d3e4",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "65bf73bee1a4f3722208ae46afc0fa5de76b9a0a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "e807c9193d9493c7a0d039158ebb955050a76df1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "689fd8b65d669b96d612ccc37d6fb87bf7ed6907",
              "lessThan": "7720b63bcef3f54c7fe288774b720a227d54a306",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "kernel/trace/ftrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "2.6.32",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "2.6.32",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.266",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.217",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.183",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.148",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.101",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.42",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.6",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-11-06T16:43:12.474480Z",
          "id": "CVE-2026-68146",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1474fe4453505b6be720b5bb94be1c927de3314a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3d0dd138a06c782f8b755cd1b6f9909494514ce1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/65bf73bee1a4f3722208ae46afc0fa5de76b9a0a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7720b63bcef3f54c7fe288774b720a227d54a306",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/90be137813e1a5bdfd671e40fe28004fb959d3e4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a29bc20ea5f0cb79c6287f2c6182c5eeb8e6c01f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/db76744d588086695371ecdd982694395628ba48",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e807c9193d9493c7a0d039158ebb955050a76df1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}