CVE-2026-45924 (GCVE-0-2026-45924)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:17 – Updated: 2026-05-27 12:17
VLAI
Title
ksmbd: call ksmbd_vfs_kern_path_end_removing() on some error paths
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: call ksmbd_vfs_kern_path_end_removing() on some error paths There are two places where ksmbd_vfs_kern_path_end_removing() needs to be called in order to balance what the corresponding successful call to ksmbd_vfs_kern_path_start_removing() has done, i.e. drop inode locks and put the taken references. Otherwise there might be potential deadlocks and unbalanced locks which are caught like: BUG: workqueue leaked lock or atomic: kworker/5:21/0x00000000/7596 last function: handle_ksmbd_work 2 locks held by kworker/5:21/7596: #0: ffff8881051ae448 (sb_writers#3){.+.+}-{0:0}, at: ksmbd_vfs_kern_path_locked+0x142/0x660 #1: ffff888130e966c0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: ksmbd_vfs_kern_path_locked+0x17d/0x660 CPU: 5 PID: 7596 Comm: kworker/5:21 Not tainted 6.1.162-00456-gc29b353f383b #138 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014 Workqueue: ksmbd-io handle_ksmbd_work Call Trace: <TASK> dump_stack_lvl+0x44/0x5b process_one_work.cold+0x57/0x5c worker_thread+0x82/0x600 kthread+0x153/0x190 ret_from_fork+0x22/0x30 </TASK> Found by Linux Verification Center (linuxtesting.org).
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9d5012ffe14120f978ee34aef4df3d6cb026b7c4 , < 8e3a3192ef78d8302916408d62813b1fddfc8972 (git)
Affected: ac98d54630d5b52e3f684d872f0d82c06c418ea9 , < f221baa80e5959a0c08a7e34abbf2a4d3cf0e1c2 (git)
Affected: 1e858a7a51c7b8b009d8f246de7ceb7743b44a71 , < cf29329a13df79c198b45dfc92577638d30b56fa (git)
Affected: 814cfdb6358d9b84fcbec9918c8f938cc096a43a , < 34d6691933682f0516259a31b39d2cebcedec0a5 (git)
Affected: d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694 , < 0c578e8065c4b08d5635a4cbc0f6321df9d20f79 (git)
Affected: d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694 , < 4c38600feb81c670edb82e49d201d3d2d00cd4c3 (git)
Affected: d5fc1400a34b4ea5e8f2ce296ea12bf8c8421694 , < a09dc10d1353f0e92c21eae2a79af1c2b1ddcde8 (git)
Affected: a7dddd62578c2eb6cb28b8835556a121b5157323 (git)
Affected: a726fef6d7d4cfc365d3434e3916dbfe78991a33 (git)
Affected: 5.15.190 , < 5.15.203 (semver)
Affected: 6.1.149 , < 6.1.167 (semver)
Affected: 6.6.103 , < 6.6.130 (semver)
Affected: 6.12.43 , < 6.12.78 (semver)
Affected: 6.15.11 , < 6.16 (semver)
Affected: 6.16.2 , < 6.17 (semver)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: call ksmbd_vfs_kern_path_end_removing() on some error paths\n\nThere are two places where ksmbd_vfs_kern_path_end_removing() needs to be\ncalled in order to balance what the corresponding successful call to\nksmbd_vfs_kern_path_start_removing() has done, i.e. drop inode locks and\nput the taken references.  Otherwise there might be potential deadlocks\nand unbalanced locks which are caught like:\n\nBUG: workqueue leaked lock or atomic: kworker/5:21/0x00000000/7596\n     last function: handle_ksmbd_work\n2 locks held by kworker/5:21/7596:\n #0: ffff8881051ae448 (sb_writers#3){.+.+}-{0:0}, at: ksmbd_vfs_kern_path_locked+0x142/0x660\n #1: ffff888130e966c0 (\u0026type-\u003ei_mutex_dir_key#3/1){+.+.}-{4:4}, at: ksmbd_vfs_kern_path_locked+0x17d/0x660\nCPU: 5 PID: 7596 Comm: kworker/5:21 Not tainted 6.1.162-00456-gc29b353f383b #138\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\nWorkqueue: ksmbd-io handle_ksmbd_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x44/0x5b\n process_one_work.cold+0x57/0x5c\n worker_thread+0x82/0x600\n kthread+0x153/0x190\n ret_from_fork+0x22/0x30\n \u003c/TASK\u003e\n\nFound by Linux Verification Center (linuxtesting.org)."
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: call ksmbd_vfs_kern_path_end_removing() on some error paths\n\nThere are two places where ksmbd_vfs_kern_path_end_removing() needs to be\ncalled in order to balance what the corresponding successful call to\nksmbd_vfs_kern_path_start_removing() has done, i.e. drop inode locks and\nput the taken references.  Otherwise there might be potential deadlocks\nand unbalanced locks which are caught like:\n\nBUG: workqueue leaked lock or atomic: kworker/5:21/0x00000000/7596\n     last function: handle_ksmbd_work\n2 locks held by kworker/5:21/7596:\n #0: ffff8881051ae448 (sb_writers#3){.+.+}-{0:0}, at: ksmbd_vfs_kern_path_locked+0x142/0x660\n #1: ffff888130e966c0 (\u0026type-\u003ei_mutex_dir_key#3/1){+.+.}-{4:4}, at: ksmbd_vfs_kern_path_locked+0x17d/0x660\nCPU: 5 PID: 7596 Comm: kworker/5:21 Not tainted 6.1.162-00456-gc29b353f383b #138\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\nWorkqueue: ksmbd-io handle_ksmbd_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x44/0x5b\n process_one_work.cold+0x57/0x5c\n worker_thread+0x82/0x600\n kthread+0x153/0x190\n ret_from_fork+0x22/0x30\n \u003c/TASK\u003e\n\nFound by Linux Verification Center (linuxtesting.org)."
          }
        ],
        "id": "CVE-2026-45924",
        "lastModified": "2026-06-24T17:21:38.327",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-05-27T14:17:07.413",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0c578e8065c4b08d5635a4cbc0f6321df9d20f79"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/34d6691933682f0516259a31b39d2cebcedec0a5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4c38600feb81c670edb82e49d201d3d2d00cd4c3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8e3a3192ef78d8302916408d62813b1fddfc8972"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a09dc10d1353f0e92c21eae2a79af1c2b1ddcde8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cf29329a13df79c198b45dfc92577638d30b56fa"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f221baa80e5959a0c08a7e34abbf2a4d3cf0e1c2"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Undergoing Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-667"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:40:05+00:00",
      "cve": "CVE-2026-45924",
      "id": "CVE-2026-45924",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ksmbd: call ksmbd_vfs_kern_path_end_removing() on some error paths",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45924.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-27T16:59:52Z",
      "cve": "CVE-2026-45924",
      "id": "CVE-2026-45924",
      "initial_release_date": "2026-05-28T03:56:06Z",
      "product_status:known_affected": "114",
      "product_status:known_not_affected": "187",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-45924",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45924.json",
      "version": "5"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.