CVE-2026-64455 (GCVE-0-2026-64455)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-11-06 16:44
VLAI
Title
USB: chaoskey: Fix slab-use-after-free in chaoskey_release()
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: chaoskey: Fix slab-use-after-free in chaoskey_release() The chaoskey driver has a use-after-free bug in its release routine. If the user closes the device file after the USB device has been unplugged, a debugging log statement will try to access the usb_interface structure after it has been deallocated: BUG: KASAN: slab-use-after-free in dev_driver_string (drivers/base/core.c:2406) Read of size 8 at addr ffff888168e8a0b8 by task chaoskey_raw_re/10106 Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120) print_report (mm/kasan/report.c:378 mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:595) dev_driver_string (drivers/base/core.c:2406) __dynamic_dev_dbg (lib/dynamic_debug.c:906) chaoskey_release (drivers/usb/misc/chaoskey.c:323) __fput (fs/file_table.c:510) fput_close_sync (fs/file_table.c:615) __x64_sys_close (fs/open.c:1507 fs/open.c:1492 fs/open.c:1492) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) The driver's last reference to the interface structure is dropped in the chaoskey_free() routine, so the code must not use the interface -- even in a debugging statement -- after that routine returns. (Exception: If we know that another reference is held by someone else, such as the device core while the disconnect routine runs, there's no problem. Thanks to Johan Hovold for pointing this out.) Since the bad access is part of an unimportant debugging statement, we can fix the problem simply by removing the whole statement.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 16:38 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 66e3e591891da9899a8990792da080432531ffd4 , < fe7a0f4be283b40dd592540027279735120d0d6f (git)
Affected: 66e3e591891da9899a8990792da080432531ffd4 , < 5ec61fbef9ec5635c492ae63dfb5d13f2bdf1023 (git)
Affected: 66e3e591891da9899a8990792da080432531ffd4 , < f3e409476ad0703c54c14f245e4e143c8124e1bd (git)
Affected: 66e3e591891da9899a8990792da080432531ffd4 , < 6c82f88bc7a8458d5c60f9b354c4d32d233f0cac (git)
Affected: 66e3e591891da9899a8990792da080432531ffd4 , < 3ad5fbcced4e9c2b0fee3c1b76289a147fc35b89 (git)
Affected: 66e3e591891da9899a8990792da080432531ffd4 , < 2a52d55c86a429dac47886b8424e67f90b001e67 (git)
Affected: 66e3e591891da9899a8990792da080432531ffd4 , < 8f50613bff228272577893aa10a346a2f3063e49 (git)
Affected: 66e3e591891da9899a8990792da080432531ffd4 , < abf76d3239dee97b66e7241ad04811f1ce562e28 (git)
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Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: chaoskey: Fix slab-use-after-free in chaoskey_release()\n\nThe chaoskey driver has a use-after-free bug in its release routine.\nIf the user closes the device file after the USB device has been\nunplugged, a debugging log statement will try to access the\nusb_interface structure after it has been deallocated:\n\n\tBUG: KASAN: slab-use-after-free in dev_driver_string (drivers/base/core.c:2406)\n\tRead of size 8 at addr ffff888168e8a0b8 by task chaoskey_raw_re/10106\n\n\tHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n\tCall Trace:\n\t \u003cTASK\u003e\n\t dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)\n\t print_report (mm/kasan/report.c:378 mm/kasan/report.c:482)\n\t kasan_report (mm/kasan/report.c:595)\n\t dev_driver_string (drivers/base/core.c:2406)\n\t __dynamic_dev_dbg (lib/dynamic_debug.c:906)\n\t chaoskey_release (drivers/usb/misc/chaoskey.c:323)\n\t __fput (fs/file_table.c:510)\n\t fput_close_sync (fs/file_table.c:615)\n\t __x64_sys_close (fs/open.c:1507 fs/open.c:1492 fs/open.c:1492)\n\t do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\n\t entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nThe driver\u0027s last reference to the interface structure is dropped in\nthe chaoskey_free() routine, so the code must not use the interface --\neven in a debugging statement -- after that routine returns.\n(Exception: If we know that another reference is held by someone else,\nsuch as the device core while the disconnect routine runs, there\u0027s no\nproblem.  Thanks to Johan Hovold for pointing this out.)\n\nSince the bad access is part of an unimportant debugging statement,\nwe can fix the problem simply by removing the whole statement."
          }
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        "lastModified": "2026-11-06T17:18:54.900",
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                "timestamp": "2026-11-06T16:38:50.828275Z",
                "version": "2.0.3"
              }
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        "published": "2026-07-25T10:17:30.537",
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          },
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            "url": "https://git.kernel.org/stable/c/5ec61fbef9ec5635c492ae63dfb5d13f2bdf1023"
          },
          {
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          },
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          },
          {
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            "url": "https://git.kernel.org/stable/c/abf76d3239dee97b66e7241ad04811f1ce562e28"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f3e409476ad0703c54c14f245e4e143c8124e1bd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/fe7a0f4be283b40dd592540027279735120d0d6f"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-05T22:04:58+00:00",
      "cve": "CVE-2026-64455",
      "id": "CVE-2026-64455",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_affected": "158",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: USB: chaoskey: Fix slab-use-after-free in chaoskey_release()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64455.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-64455",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-11-06T16:38:50.828275Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
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            "providerMetadata": {
              "dateUpdated": "2026-11-06T16:38:52.439Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/usb/misc/chaoskey.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
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                {
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                  "status": "affected",
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                  "versionType": "git"
                },
                {
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              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/usb/misc/chaoskey.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.1"
                },
                {
                  "lessThan": "4.1",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.261",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.212",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.178",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.145",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.96",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.18.*",
                  "status": "unaffected",
                  "version": "6.18.39",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.1.*",
                  "status": "unaffected",
                  "version": "7.1.4",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "7.2",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
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                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.261",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.212",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.178",
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                    {
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                    {
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                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.39",
                      "versionStartIncluding": "4.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.1.4",
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                      "vulnerable": true
                    },
                    {
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                      "versionEndExcluding": "7.2",
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                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: chaoskey: Fix slab-use-after-free in chaoskey_release()\n\nThe chaoskey driver has a use-after-free bug in its release routine.\nIf the user closes the device file after the USB device has been\nunplugged, a debugging log statement will try to access the\nusb_interface structure after it has been deallocated:\n\n\tBUG: KASAN: slab-use-after-free in dev_driver_string (drivers/base/core.c:2406)\n\tRead of size 8 at addr ffff888168e8a0b8 by task chaoskey_raw_re/10106\n\n\tHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n\tCall Trace:\n\t \u003cTASK\u003e\n\t dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)\n\t print_report (mm/kasan/report.c:378 mm/kasan/report.c:482)\n\t kasan_report (mm/kasan/report.c:595)\n\t dev_driver_string (drivers/base/core.c:2406)\n\t __dynamic_dev_dbg (lib/dynamic_debug.c:906)\n\t chaoskey_release (drivers/usb/misc/chaoskey.c:323)\n\t __fput (fs/file_table.c:510)\n\t fput_close_sync (fs/file_table.c:615)\n\t __x64_sys_close (fs/open.c:1507 fs/open.c:1492 fs/open.c:1492)\n\t do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\n\t entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nThe driver\u0027s last reference to the interface structure is dropped in\nthe chaoskey_free() routine, so the code must not use the interface --\neven in a debugging statement -- after that routine returns.\n(Exception: If we know that another reference is held by someone else,\nsuch as the device core while the disconnect routine runs, there\u0027s no\nproblem.  Thanks to Johan Hovold for pointing this out.)\n\nSince the bad access is part of an unimportant debugging statement,\nwe can fix the problem simply by removing the whole statement."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-17T04:55:59.518Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/fe7a0f4be283b40dd592540027279735120d0d6f"
            },
            {
              "url": "https://git.kernel.org/stable/c/5ec61fbef9ec5635c492ae63dfb5d13f2bdf1023"
            },
            {
              "url": "https://git.kernel.org/stable/c/f3e409476ad0703c54c14f245e4e143c8124e1bd"
            },
            {
              "url": "https://git.kernel.org/stable/c/6c82f88bc7a8458d5c60f9b354c4d32d233f0cac"
            },
            {
              "url": "https://git.kernel.org/stable/c/3ad5fbcced4e9c2b0fee3c1b76289a147fc35b89"
            },
            {
              "url": "https://git.kernel.org/stable/c/2a52d55c86a429dac47886b8424e67f90b001e67"
            },
            {
              "url": "https://git.kernel.org/stable/c/8f50613bff228272577893aa10a346a2f3063e49"
            },
            {
              "url": "https://git.kernel.org/stable/c/abf76d3239dee97b66e7241ad04811f1ce562e28"
            }
          ],
          "title": "USB: chaoskey: Fix slab-use-after-free in chaoskey_release()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-64455",
        "datePublished": "2026-07-25T08:51:23.952Z",
        "dateReserved": "2026-07-19T15:36:31.789Z",
        "dateUpdated": "2026-11-06T16:44:52.476Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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