Vulnerability-Lookup

FKIE_CVE-2023-54258

Vulnerability from fkie_nvd - Published: 2025-12-30 13:16 - Updated: 2026-08-04 11:16

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: cifs: fix potential oops in cifs_oplock_break With deferred close we can have closes that race with lease breaks, and so with the current checks for whether to send the lease response, oplock_response(), this can mean that an unmount (kill_sb) can occur just before we were checking if the tcon->ses is valid. See below: [Fri Aug 4 04:12:50 2023] RIP: 0010:cifs_oplock_break+0x1f7/0x5b0 [cifs] [Fri Aug 4 04:12:50 2023] Code: 7d a8 48 8b 7d c0 c0 e9 02 48 89 45 b8 41 89 cf e8 3e f5 ff ff 4c 89 f7 41 83 e7 01 e8 82 b3 03 f2 49 8b 45 50 48 85 c0 74 5e <48> 83 78 60 00 74 57 45 84 ff 75 52 48 8b 43 98 48 83 eb 68 48 39 [Fri Aug 4 04:12:50 2023] RSP: 0018:ffffb30607ddbdf8 EFLAGS: 00010206 [Fri Aug 4 04:12:50 2023] RAX: 632d223d32612022 RBX: ffff97136944b1e0 RCX: 0000000080100009 [Fri Aug 4 04:12:50 2023] RDX: 0000000000000001 RSI: 0000000080100009 RDI: ffff97136944b188 [Fri Aug 4 04:12:50 2023] RBP: ffffb30607ddbe58 R08: 0000000000000001 R09: ffffffffc08e0900 [Fri Aug 4 04:12:50 2023] R10: 0000000000000001 R11: 000000000000000f R12: ffff97136944b138 [Fri Aug 4 04:12:50 2023] R13: ffff97149147c000 R14: ffff97136944b188 R15: 0000000000000000 [Fri Aug 4 04:12:50 2023] FS: 0000000000000000(0000) GS:ffff9714f7c00000(0000) knlGS:0000000000000000 [Fri Aug 4 04:12:50 2023] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [Fri Aug 4 04:12:50 2023] CR2: 00007fd8de9c7590 CR3: 000000011228e000 CR4: 0000000000350ef0 [Fri Aug 4 04:12:50 2023] Call Trace: [Fri Aug 4 04:12:50 2023] <TASK> [Fri Aug 4 04:12:50 2023] process_one_work+0x225/0x3d0 [Fri Aug 4 04:12:50 2023] worker_thread+0x4d/0x3e0 [Fri Aug 4 04:12:50 2023] ? process_one_work+0x3d0/0x3d0 [Fri Aug 4 04:12:50 2023] kthread+0x12a/0x150 [Fri Aug 4 04:12:50 2023] ? set_kthread_struct+0x50/0x50 [Fri Aug 4 04:12:50 2023] ret_from_fork+0x22/0x30 [Fri Aug 4 04:12:50 2023] </TASK> To fix this change the ordering of the checks before sending the oplock_response to first check if the openFileList is empty.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5ee28bcfbaacf289eb25c662a2862542ea6ce6a7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6b67a6d2e50634fe127e656147c81915955e9f5e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b99f490ea87ebcca3a429fd8837067feb56a4c7c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e8f5f849ffce24490eb9449e98312b66c0dba76f

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b99f490ea87ebcca3a429fd8837067feb56a4c7c",
              "status": "affected",
              "version": "63fb45ddc491895c4b36664e0c2c3b548545ae93",
              "versionType": "git"
            },
            {
              "lessThan": "5ee28bcfbaacf289eb25c662a2862542ea6ce6a7",
              "status": "affected",
              "version": "1bf709b9625001eefdd41048c5f4c7544ee33394",
              "versionType": "git"
            },
            {
              "lessThan": "6b67a6d2e50634fe127e656147c81915955e9f5e",
              "status": "affected",
              "version": "3b4c15171c3ce9120c81f5564b9367d8d0f4219c",
              "versionType": "git"
            },
            {
              "lessThan": "e8f5f849ffce24490eb9449e98312b66c0dba76f",
              "status": "affected",
              "version": "da787d5b74983f7525d1eb4b9c0b4aff2821511a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cff7fb969edaeff2bc80c8a8f7cf7b0c8df32da7",
              "versionType": "git"
            },
            {
              "lessThan": "6.4",
              "status": "affected",
              "version": "6.3.13",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5.15.128",
              "status": "affected",
              "version": "5.15.121",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.47",
              "status": "affected",
              "version": "6.1.39",
              "versionType": "semver"
            },
            {
              "lessThan": "6.4.12",
              "status": "affected",
              "version": "6.4.4",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix potential oops in cifs_oplock_break\n\nWith deferred close we can have closes that race with lease breaks,\nand so with the current checks for whether to send the lease response,\noplock_response(), this can mean that an unmount (kill_sb) can occur\njust before we were checking if the tcon-\u003eses is valid.  See below:\n\n[Fri Aug  4 04:12:50 2023] RIP: 0010:cifs_oplock_break+0x1f7/0x5b0 [cifs]\n[Fri Aug  4 04:12:50 2023] Code: 7d a8 48 8b 7d c0 c0 e9 02 48 89 45 b8 41 89 cf e8 3e f5 ff ff 4c 89 f7 41 83 e7 01 e8 82 b3 03 f2 49 8b 45 50 48 85 c0 74 5e \u003c48\u003e 83 78 60 00 74 57 45 84 ff 75 52 48 8b 43 98 48 83 eb 68 48 39\n[Fri Aug  4 04:12:50 2023] RSP: 0018:ffffb30607ddbdf8 EFLAGS: 00010206\n[Fri Aug  4 04:12:50 2023] RAX: 632d223d32612022 RBX: ffff97136944b1e0 RCX: 0000000080100009\n[Fri Aug  4 04:12:50 2023] RDX: 0000000000000001 RSI: 0000000080100009 RDI: ffff97136944b188\n[Fri Aug  4 04:12:50 2023] RBP: ffffb30607ddbe58 R08: 0000000000000001 R09: ffffffffc08e0900\n[Fri Aug  4 04:12:50 2023] R10: 0000000000000001 R11: 000000000000000f R12: ffff97136944b138\n[Fri Aug  4 04:12:50 2023] R13: ffff97149147c000 R14: ffff97136944b188 R15: 0000000000000000\n[Fri Aug  4 04:12:50 2023] FS:  0000000000000000(0000) GS:ffff9714f7c00000(0000) knlGS:0000000000000000\n[Fri Aug  4 04:12:50 2023] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[Fri Aug  4 04:12:50 2023] CR2: 00007fd8de9c7590 CR3: 000000011228e000 CR4: 0000000000350ef0\n[Fri Aug  4 04:12:50 2023] Call Trace:\n[Fri Aug  4 04:12:50 2023]  \u003cTASK\u003e\n[Fri Aug  4 04:12:50 2023]  process_one_work+0x225/0x3d0\n[Fri Aug  4 04:12:50 2023]  worker_thread+0x4d/0x3e0\n[Fri Aug  4 04:12:50 2023]  ? process_one_work+0x3d0/0x3d0\n[Fri Aug  4 04:12:50 2023]  kthread+0x12a/0x150\n[Fri Aug  4 04:12:50 2023]  ? set_kthread_struct+0x50/0x50\n[Fri Aug  4 04:12:50 2023]  ret_from_fork+0x22/0x30\n[Fri Aug  4 04:12:50 2023]  \u003c/TASK\u003e\n\nTo fix this change the ordering of the checks before sending the oplock_response\nto first check if the openFileList is empty."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncifs: corrige un posible oops en cifs_oplock_break\n\nCon el cierre diferido podemos tener cierres que compiten con las interrupciones de arrendamiento, y as\u00ed, con las comprobaciones actuales para determinar si enviar la respuesta de arrendamiento, oplock_response(), esto puede significar que un desmontaje (kill_sb) puede ocurrir justo antes de que estuvi\u00e9ramos comprobando si tcon-\u0026gt;ses es v\u00e1lido. V\u00e9ase a continuaci\u00f3n:\n\n[Fri Aug  4 04:12:50 2023] RIP: 0010:cifs_oplock_break+0x1f7/0x5b0 [cifs]\n[Fri Aug  4 04:12:50 2023] Code: 7d a8 48 8b 7d c0 c0 e9 02 48 89 45 b8 41 89 cf e8 3e f5 ff ff 4c 89 f7 41 83 e7 01 e8 82 b3 03 f2 49 8b 45 50 48 85 c0 74 5e \u0026lt;48\u0026gt; 83 78 60 00 74 57 45 84 ff 75 52 48 8b 43 98 48 83 eb 68 48 39\n[Fri Aug  4 04:12:50 2023] RSP: 0018:ffffb30607ddbdf8 EFLAGS: 00010206\n[Fri Aug  4 04:12:50 2023] RAX: 632d223d32612022 RBX: ffff97136944b1e0 RCX: 0000000080100009\n[Fri Aug  4 04:12:50 2023] RDX: 0000000000000001 RSI: 0000000080100009 RDI: ffff97136944b188\n[Fri Aug  4 04:12:50 2023] RBP: ffffb30607ddbe58 R08: 0000000000000001 R09: ffffffffc08e0900\n[Fri Aug  4 04:12:50 2023] R10: 0000000000000001 R11: 000000000000000f R12: ffff97136944b138\n[Fri Aug  4 04:12:50 2023] R13: ffff97149147c000 R14: ffff97136944b188 R15: 0000000000000000\n[Fri Aug  4 04:12:50 2023] FS:  0000000000000000(0000) GS:ffff9714f7c00000(0000) knlGS:0000000000000000\n[Fri Aug  4 04:12:50 2023] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[Fri Aug  4 04:12:50 2023] CR2: 00007fd8de9c7590 CR3: 000000011228e000 CR4: 0000000000350ef0\n[Fri Aug  4 04:12:50 2023] Call Trace:\n[Fri Aug  4 04:12:50 2023]  \n[Fri Aug  4 04:12:50 2023]  process_one_work+0x225/0x3d0\n[Fri Aug  4 04:12:50 2023]  worker_thread+0x4d/0x3e0\n[Fri Aug  4 04:12:50 2023]  ? process_one_work+0x3d0/0x3d0\n[Fri Aug  4 04:12:50 2023]  kthread+0x12a/0x150\n[Fri Aug  4 04:12:50 2023]  ? set_kthread_struct+0x50/0x50\n[Fri Aug  4 04:12:50 2023]  ret_from_fork+0x22/0x30\n[Fri Aug  4 04:12:50 2023]  \n\nPara solucionar esto, cambie el orden de las comprobaciones antes de enviar la oplock_response para comprobar primero si la openFileList est\u00e1 vac\u00eda."
    }
  ],
  "id": "CVE-2023-54258",
  "lastModified": "2026-08-04T11:16:38.623",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-12-30T13:16:14.560",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ee28bcfbaacf289eb25c662a2862542ea6ce6a7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6b67a6d2e50634fe127e656147c81915955e9f5e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b99f490ea87ebcca3a429fd8837067feb56a4c7c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e8f5f849ffce24490eb9449e98312b66c0dba76f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}

CVE-2023-54258 (GCVE-0-2023-54258)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-08-05 09:18

Title

cifs: fix potential oops in cifs_oplock_break

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/b99f490ea87ebcca3…
https://git.kernel.org/stable/c/5ee28bcfbaacf289e…
https://git.kernel.org/stable/c/6b67a6d2e50634fe1…
https://git.kernel.org/stable/c/e8f5f849ffce24490…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 63fb45ddc491895c4b36664e0c2c3b548545ae93 , < b99f490ea87ebcca3a429fd8837067feb56a4c7c (git) Affected: 1bf709b9625001eefdd41048c5f4c7544ee33394 , < 5ee28bcfbaacf289eb25c662a2862542ea6ce6a7 (git) Affected: 3b4c15171c3ce9120c81f5564b9367d8d0f4219c , < 6b67a6d2e50634fe127e656147c81915955e9f5e (git) Affected: da787d5b74983f7525d1eb4b9c0b4aff2821511a , < e8f5f849ffce24490eb9449e98312b66c0dba76f (git) Affected: cff7fb969edaeff2bc80c8a8f7cf7b0c8df32da7 (git) Affected: 6.3.13 , < 6.4 (semver)
Linux	Linux	Affected: 5.15.121 , < 5.15.128 (semver) Affected: 6.1.39 , < 6.1.47 (semver) Affected: 6.4.4 , < 6.4.12 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b99f490ea87ebcca3a429fd8837067feb56a4c7c",
              "status": "affected",
              "version": "63fb45ddc491895c4b36664e0c2c3b548545ae93",
              "versionType": "git"
            },
            {
              "lessThan": "5ee28bcfbaacf289eb25c662a2862542ea6ce6a7",
              "status": "affected",
              "version": "1bf709b9625001eefdd41048c5f4c7544ee33394",
              "versionType": "git"
            },
            {
              "lessThan": "6b67a6d2e50634fe127e656147c81915955e9f5e",
              "status": "affected",
              "version": "3b4c15171c3ce9120c81f5564b9367d8d0f4219c",
              "versionType": "git"
            },
            {
              "lessThan": "e8f5f849ffce24490eb9449e98312b66c0dba76f",
              "status": "affected",
              "version": "da787d5b74983f7525d1eb4b9c0b4aff2821511a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cff7fb969edaeff2bc80c8a8f7cf7b0c8df32da7",
              "versionType": "git"
            },
            {
              "lessThan": "6.4",
              "status": "affected",
              "version": "6.3.13",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5.15.128",
              "status": "affected",
              "version": "5.15.121",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.47",
              "status": "affected",
              "version": "6.1.39",
              "versionType": "semver"
            },
            {
              "lessThan": "6.4.12",
              "status": "affected",
              "version": "6.4.4",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.128",
                  "versionStartIncluding": "5.15.121",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.47",
                  "versionStartIncluding": "6.1.39",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.12",
                  "versionStartIncluding": "6.4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.3.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix potential oops in cifs_oplock_break\n\nWith deferred close we can have closes that race with lease breaks,\nand so with the current checks for whether to send the lease response,\noplock_response(), this can mean that an unmount (kill_sb) can occur\njust before we were checking if the tcon-\u003eses is valid.  See below:\n\n[Fri Aug  4 04:12:50 2023] RIP: 0010:cifs_oplock_break+0x1f7/0x5b0 [cifs]\n[Fri Aug  4 04:12:50 2023] Code: 7d a8 48 8b 7d c0 c0 e9 02 48 89 45 b8 41 89 cf e8 3e f5 ff ff 4c 89 f7 41 83 e7 01 e8 82 b3 03 f2 49 8b 45 50 48 85 c0 74 5e \u003c48\u003e 83 78 60 00 74 57 45 84 ff 75 52 48 8b 43 98 48 83 eb 68 48 39\n[Fri Aug  4 04:12:50 2023] RSP: 0018:ffffb30607ddbdf8 EFLAGS: 00010206\n[Fri Aug  4 04:12:50 2023] RAX: 632d223d32612022 RBX: ffff97136944b1e0 RCX: 0000000080100009\n[Fri Aug  4 04:12:50 2023] RDX: 0000000000000001 RSI: 0000000080100009 RDI: ffff97136944b188\n[Fri Aug  4 04:12:50 2023] RBP: ffffb30607ddbe58 R08: 0000000000000001 R09: ffffffffc08e0900\n[Fri Aug  4 04:12:50 2023] R10: 0000000000000001 R11: 000000000000000f R12: ffff97136944b138\n[Fri Aug  4 04:12:50 2023] R13: ffff97149147c000 R14: ffff97136944b188 R15: 0000000000000000\n[Fri Aug  4 04:12:50 2023] FS:  0000000000000000(0000) GS:ffff9714f7c00000(0000) knlGS:0000000000000000\n[Fri Aug  4 04:12:50 2023] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[Fri Aug  4 04:12:50 2023] CR2: 00007fd8de9c7590 CR3: 000000011228e000 CR4: 0000000000350ef0\n[Fri Aug  4 04:12:50 2023] Call Trace:\n[Fri Aug  4 04:12:50 2023]  \u003cTASK\u003e\n[Fri Aug  4 04:12:50 2023]  process_one_work+0x225/0x3d0\n[Fri Aug  4 04:12:50 2023]  worker_thread+0x4d/0x3e0\n[Fri Aug  4 04:12:50 2023]  ? process_one_work+0x3d0/0x3d0\n[Fri Aug  4 04:12:50 2023]  kthread+0x12a/0x150\n[Fri Aug  4 04:12:50 2023]  ? set_kthread_struct+0x50/0x50\n[Fri Aug  4 04:12:50 2023]  ret_from_fork+0x22/0x30\n[Fri Aug  4 04:12:50 2023]  \u003c/TASK\u003e\n\nTo fix this change the ordering of the checks before sending the oplock_response\nto first check if the openFileList is empty."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The oplock/lease break is an unsolicited SMB2 notification packet received from the remote server and processed by the cifs demultiplex thread (`is_oplock_break` \u2192 `cifs_queue_oplock_break`), so a malicious/compromised SMB server or an MITM on a non-signed connection triggers the vulnerable work item purely over the network. This matches the treatment of other cifs client bugs driven by server-supplied data, including the identical CVE-2025-38527 in this same function.\nAC:L - The remote server controls the triggering side entirely and can send lease/oplock breaks continuously, and the same break drives `cifs_close_deferred_file()` on the other side; with the last handle the `kfree(tcon)` occurs synchronously inside `_cifsFileInfo_put()` rather than through a narrow window, and unmounts occur automatically in common autofs/automount deployments.\nPR:N - The attacker is the SMB server (or an MITM) and needs no credentials or privileges on the victim client; the client\u0027s own handling of a server-sent break notification is what enters the vulnerable path.\nUI:N - Against an already-mounted share the attack needs no victim action \u2014 the server sends break notifications on its own schedule and the teardown side is reached via deferred-close plus automatic/idle unmount rather than an interactive step.\nS:U - The use-after-free is in kernel memory and its impact stays within the kernel\u0027s own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The freed `struct cifs_tcon` is dereferenced through a four-level pointer chain (`tcon-\u003eses-\u003eserver-\u003eops`) read from reallocated slab contents, which after heap grooming yields an arbitrary kernel read primitive; the oops itself shows the freed object already refilled with unrelated heap data.\nI:H - The stale pointer terminates in an indirect call `tcon-\u003eses-\u003eserver-\u003eops-\u003eoplock_response(tcon, ...)` where every pointer in the chain and the first argument come from freed, reallocatable memory, giving a control-flow hijack primitive and thus arbitrary kernel code execution.\nA:H - Even unexploited, the bug produces an immediate kernel oops (general protection fault from the non-canonical `ses` pointer in the reported trace), and it can be re-triggered repeatedly by the remote server."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:18:36.889Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b99f490ea87ebcca3a429fd8837067feb56a4c7c"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ee28bcfbaacf289eb25c662a2862542ea6ce6a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b67a6d2e50634fe127e656147c81915955e9f5e"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8f5f849ffce24490eb9449e98312b66c0dba76f"
        }
      ],
      "title": "cifs: fix potential oops in cifs_oplock_break",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54258",
    "datePublished": "2025-12-30T12:15:52.855Z",
    "dateReserved": "2025-12-30T12:06:44.516Z",
    "dateUpdated": "2026-08-05T09:18:36.889Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

FKIE_CVE-2023-54258

CVE-2023-54258 (GCVE-0-2023-54258)

Tags

Sightings

Nomenclature

Related by attack behaviour