Vulnerability-Lookup

FKIE_CVE-2024-36016

Vulnerability from fkie_nvd - Published: 2024-05-29 19:15 - Updated: 2026-08-04 11:18

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix possible out-of-bounds in gsm0_receive() Assuming the following: - side A configures the n_gsm in basic option mode - side B sends the header of a basic option mode frame with data length 1 - side A switches to advanced option mode - side B sends 2 data bytes which exceeds gsm->len Reason: gsm->len is not used in advanced option mode. - side A switches to basic option mode - side B keeps sending until gsm0_receive() writes past gsm->buf Reason: Neither gsm->state nor gsm->len have been reset after reconfiguration. Fix this by changing gsm->count to gsm->len comparison from equal to less than. Also add upper limit checks against the constant MAX_MRU in gsm0_receive() and gsm1_receive() to harden against memory corruption of gsm->len and gsm->mru. All other checks remain as we still need to limit the data according to the user configuration and actual payload size.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/46f52c89a7e7d2691b97a9728e4591d071ca8abc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/47388e807f85948eefc403a8a5fdc5b406a65d5a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4c267110fc110390704cc065edb9817fdd10ff54	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/774d83b008eccb1c48c14dc5486e7aa255731350	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9513d4148950b05bc99fa7314dc883cc0e1605e5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b890d45aaf02b564e6cae2d2a590f9649330857d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f126ce7305fe88f49cdabc6db4168b9318898ea3	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/46f52c89a7e7d2691b97a9728e4591d071ca8abc	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/47388e807f85948eefc403a8a5fdc5b406a65d5a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/4c267110fc110390704cc065edb9817fdd10ff54	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/774d83b008eccb1c48c14dc5486e7aa255731350	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/9513d4148950b05bc99fa7314dc883cc0e1605e5	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/b890d45aaf02b564e6cae2d2a590f9649330857d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/f126ce7305fe88f49cdabc6db4168b9318898ea3	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/n_gsm.c"
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              "status": "unaffected",
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              "status": "unaffected",
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              "status": "unaffected",
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            },
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              "lessThanOrEqual": "6.2",
              "status": "unaffected",
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            },
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              "lessThanOrEqual": "6.7",
              "status": "unaffected",
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              "versionType": "custom"
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              "lessThanOrEqual": "6.9",
              "status": "unaffected",
              "version": "6.8.12",
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              "lessThanOrEqual": "6.10",
              "status": "unaffected",
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "configurations": [
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: n_gsm: fix possible out-of-bounds in gsm0_receive()\n\nAssuming the following:\n- side A configures the n_gsm in basic option mode\n- side B sends the header of a basic option mode frame with data length 1\n- side A switches to advanced option mode\n- side B sends 2 data bytes which exceeds gsm-\u003elen\n  Reason: gsm-\u003elen is not used in advanced option mode.\n- side A switches to basic option mode\n- side B keeps sending until gsm0_receive() writes past gsm-\u003ebuf\n  Reason: Neither gsm-\u003estate nor gsm-\u003elen have been reset after\n  reconfiguration.\n\nFix this by changing gsm-\u003ecount to gsm-\u003elen comparison from equal to less\nthan. Also add upper limit checks against the constant MAX_MRU in\ngsm0_receive() and gsm1_receive() to harden against memory corruption of\ngsm-\u003elen and gsm-\u003emru.\n\nAll other checks remain as we still need to limit the data according to the\nuser configuration and actual payload size."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: tty: n_gsm: corrige posibles fuera de los l\u00edmites en gsm0_receive() Suponiendo lo siguiente: - el lado A configura el n_gsm en modo de opci\u00f3n b\u00e1sica - el lado B env\u00eda el encabezado de un mensaje b\u00e1sico trama del modo de opci\u00f3n con longitud de datos 1 - el lado A cambia al modo de opci\u00f3n avanzada - el lado B env\u00eda 2 bytes de datos que exceden gsm-\u0026gt;len Motivo: gsm-\u0026gt;len no se usa en el modo de opci\u00f3n avanzada. - el lado A cambia al modo de opci\u00f3n b\u00e1sica - el lado B contin\u00faa enviando hasta que gsm0_receive() escribe m\u00e1s all\u00e1 de gsm-\u0026gt;buf Motivo: Ni gsm-\u0026gt;state ni gsm-\u0026gt;len se han restablecido despu\u00e9s de la reconfiguraci\u00f3n. Solucione este problema cambiando gsm-\u0026gt;count a gsm-\u0026gt;len comparaci\u00f3n de igual a menor que. Tambi\u00e9n agregue comprobaciones de l\u00edmite superior contra la constante MAX_MRU en gsm0_receive() y gsm1_receive() para proteger contra la corrupci\u00f3n de memoria de gsm-\u0026gt;len y gsm-\u0026gt;mru. Todas las dem\u00e1s comprobaciones permanecen, ya que todav\u00eda necesitamos limitar los datos seg\u00fan la configuraci\u00f3n del usuario y el tama\u00f1o real del payload."
    }
  ],
  "id": "CVE-2024-36016",
  "lastModified": "2026-08-04T11:18:22.827",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-36016",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-05-30T18:00:26.164343Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-29T19:15:48.297",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2024-36016 (GCVE-0-2024-36016)

Vulnerability from cvelistv5 – Published: 2024-05-29 18:46 – Updated: 2026-08-05 11:31

Title

tty: n_gsm: fix possible out-of-bounds in gsm0_receive()

Summary

Severity

7.8 (High)


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

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-30 18:00 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

10 references

URL	Tags
https://git.kernel.org/stable/c/9513d4148950b05bc…
https://git.kernel.org/stable/c/b229bc6c6ea9fe459…
https://git.kernel.org/stable/c/0fb736c9931e02dbc…
https://git.kernel.org/stable/c/4c267110fc1103907…
https://git.kernel.org/stable/c/46f52c89a7e7d2691…
https://git.kernel.org/stable/c/774d83b008eccb1c4…
https://git.kernel.org/stable/c/f126ce7305fe88f49…
https://git.kernel.org/stable/c/b890d45aaf02b564e…
https://git.kernel.org/stable/c/47388e807f85948ee…
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

6 products

Vendor	Product	Version
Linux	Linux	Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 9513d4148950b05bc99fa7314dc883cc0e1605e5 (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56 (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 0fb736c9931e02dbc7d9a75044c8e1c039e50f04 (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 4c267110fc110390704cc065edb9817fdd10ff54 (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 46f52c89a7e7d2691b97a9728e4591d071ca8abc (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 774d83b008eccb1c48c14dc5486e7aa255731350 (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < f126ce7305fe88f49cdabc6db4168b9318898ea3 (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < b890d45aaf02b564e6cae2d2a590f9649330857d (git) Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 47388e807f85948eefc403a8a5fdc5b406a65d5a (git)
Linux	Linux	Affected: 2.6.35 Unaffected: 0 , < 2.6.35 (semver) Unaffected: 4.19.316 , ≤ 4.19.* (semver) Unaffected: 5.4.278 , ≤ 5.4.* (semver) Unaffected: 5.10.219 , ≤ 5.10.* (semver) Unaffected: 5.15.161 , ≤ 5.15.* (semver) Unaffected: 6.1.93 , ≤ 6.1.* (semver) Unaffected: 6.6.33 , ≤ 6.6.* (semver) Unaffected: 6.8.12 , ≤ 6.8.* (semver) Unaffected: 6.9.3 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix)
linux	linux_kernel	Affected: e1eaea46bb40 , < b890d45aaf02 (custom) cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	Affected: e1eaea46bb40 , < 47388e807f85 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: 2.6.35 cpe:2.3:o:linux:linux_kernel:2.6.35:::::::*
linux	linux_kernel	Affected: e1eaea46bb40 , < f126ce7305fe (custom) Affected: e1eaea46bb40 , < 9513d4148950 (custom) Affected: e1eaea46bb40 , < b229bc6c6ea9 (custom) Affected: e1eaea46bb40 , < 0fb736c9931e (custom) Affected: e1eaea46bb40 , < 4c267110fc11 (custom) Affected: e1eaea46bb40 , ≤ 46f52c89a7e7 (custom) Affected: e1eaea46bb40 , < 774d83b008ec (custom) Unaffected: 0 , < 2.6.35 (custom) Unaffected: 4.19.316 , ≤ 4.20 (custom) Unaffected: 5.4.278 , ≤ 5.5 (custom) Unaffected: 5.10.219 , ≤ 5.11 (custom) Unaffected: 5.15.161 , ≤ 5.16 (custom) Unaffected: 6.1.93 , ≤ 6.2 (custom) Unaffected: 6.6.33 , ≤ 6.7 (custom) Unaffected: 6.8.12 , ≤ 6.9 (custom) Unaffected: 6.9.3 , ≤ 6.10 (custom) Unaffected: 6.10 , ≤ * (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*

Show details on NVD website

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                  "versionEndExcluding": "6.6.33",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.12",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9.3",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: n_gsm: fix possible out-of-bounds in gsm0_receive()\n\nAssuming the following:\n- side A configures the n_gsm in basic option mode\n- side B sends the header of a basic option mode frame with data length 1\n- side A switches to advanced option mode\n- side B sends 2 data bytes which exceeds gsm-\u003elen\n  Reason: gsm-\u003elen is not used in advanced option mode.\n- side A switches to basic option mode\n- side B keeps sending until gsm0_receive() writes past gsm-\u003ebuf\n  Reason: Neither gsm-\u003estate nor gsm-\u003elen have been reset after\n  reconfiguration.\n\nFix this by changing gsm-\u003ecount to gsm-\u003elen comparison from equal to less\nthan. Also add upper limit checks against the constant MAX_MRU in\ngsm0_receive() and gsm1_receive() to harden against memory corruption of\ngsm-\u003elen and gsm-\u003emru.\n\nAll other checks remain as we still need to limit the data according to the\nuser configuration and actual payload size."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation is entirely local \u2014 the attacker opens /dev/ptmx, attaches the N_GSM0710 line discipline via TIOCSETD, drives mode switches with the GSMIOC_SETCONF ioctl, and feeds the malicious byte stream by writing to the pty master. No network or physical access is involved.\nAC:L - The attacker controls both sides of the pty pair, so the exact sequence (fill count in advanced mode, reconfigure to basic mode, keep writing) is deterministic and requires no race or unpredictable memory state. A tested proof of concept was attached to the upstream bug report (bugzilla 218708).\nPR:L - Across most of the affected range (2.6.35 through 6.5, and stable trees prior to the Aug-2023 backport of 67c37756898a), attaching N_GSM0710 required no privileges whatsoever, and GSMIOC_SETCONF has no capability check at all \u2014 so a plain unprivileged local account with a pty is sufficient.\nUI:N - The attacker performs every step \u2014 ldisc attach, reconfiguration, and data injection \u2014 without any action by another user or victim process.\nS:U - The heap corruption occurs in kernel memory belonging to the same security authority as the kernel itself; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The desynced count/len are also used by gsm_fcs_add_block() and dlci-\u003edata(dlci, gsm-\u003ebuf, gsm-\u003elen), producing out-of-bounds reads whose contents are delivered into DLCI tty buffers the attacker can read back, and the heap overflow primitive can be leveraged for broader kernel memory disclosure.\nI:H - This is an unbounded linear heap buffer overflow past a 1501-byte kmalloc\u0027d object with fully attacker-controlled bytes and attacker-chosen length, giving control over adjacent kmalloc-2k slab objects \u2014 a strong primitive for arbitrary write and control-flow hijacking.\nA:H - Overwriting arbitrary amounts of adjacent slab memory reliably corrupts kernel data structures and slab metadata, causing oops or panic; the reporter observed memory corruption in practice."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:31:37.096Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9513d4148950b05bc99fa7314dc883cc0e1605e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56"
        },
        {
          "url": "https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c267110fc110390704cc065edb9817fdd10ff54"
        },
        {
          "url": "https://git.kernel.org/stable/c/46f52c89a7e7d2691b97a9728e4591d071ca8abc"
        },
        {
          "url": "https://git.kernel.org/stable/c/774d83b008eccb1c48c14dc5486e7aa255731350"
        },
        {
          "url": "https://git.kernel.org/stable/c/f126ce7305fe88f49cdabc6db4168b9318898ea3"
        },
        {
          "url": "https://git.kernel.org/stable/c/b890d45aaf02b564e6cae2d2a590f9649330857d"
        },
        {
          "url": "https://git.kernel.org/stable/c/47388e807f85948eefc403a8a5fdc5b406a65d5a"
        }
      ],
      "title": "tty: n_gsm: fix possible out-of-bounds in gsm0_receive()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-36016",
    "datePublished": "2024-05-29T18:46:34.778Z",
    "dateReserved": "2024-05-17T13:50:33.154Z",
    "dateUpdated": "2026-08-05T11:31:37.096Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

Vulnerability timeline

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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.
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