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CVE-2024-50072 (GCVE-0-2024-50072)

Vulnerability from cvelistv5 – Published: 2024-10-29 00:50 – Updated: 2026-05-23 15:54
VLAI
Title
x86/bugs: Use code segment selector for VERW operand
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Use code segment selector for VERW operand Robert Gill reported below #GP in 32-bit mode when dosemu software was executing vm86() system call: general protection fault: 0000 [#1] PREEMPT SMP CPU: 4 PID: 4610 Comm: dosemu.bin Not tainted 6.6.21-gentoo-x86 #1 Hardware name: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 10/30/2010 EIP: restore_all_switch_stack+0xbe/0xcf EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046 CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0 Call Trace: show_regs+0x70/0x78 die_addr+0x29/0x70 exc_general_protection+0x13c/0x348 exc_bounds+0x98/0x98 handle_exception+0x14d/0x14d exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf This only happens in 32-bit mode when VERW based mitigations like MDS/RFDS are enabled. This is because segment registers with an arbitrary user value can result in #GP when executing VERW. Intel SDM vol. 2C documents the following behavior for VERW instruction: #GP(0) - If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit. CLEAR_CPU_BUFFERS macro executes VERW instruction before returning to user space. Use %cs selector to reference VERW operand. This ensures VERW will not #GP for an arbitrary user %ds. [ mingo: Fixed the SOB chain. ]
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: 50f021f0b985629accf10481a6e89af8b9700583 , < bfd1d223d80cb29a210caa1bd5e21f0816d58f02 (git)
Affected: d54de9f2a127090f2017184e8257795b487d5312 , < ada431c6c31a2c8c37991c46089af5caa23a9c6e (git)
Affected: 2e3087505ddb8ba2d3d4c81306cca11e868fcdb9 , < 38c5fe74f3bef98f75d16effa49836d50c9b6097 (git)
Affected: ca13d8cd8dac25558da4ee8df4dc70e8e7f9d762 , < 481b477ab63c7245715a3e57ba79eb87c2dc0d02 (git)
Affected: a0e2dab44d22b913b4c228c8b52b2a104434b0b3 , < bc576fbaf82deded606e69a00efe9752136bf91d (git)
Affected: a0e2dab44d22b913b4c228c8b52b2a104434b0b3 , < e4d2102018542e3ae5e297bc6e229303abff8a0f (git)
Affected: 51eca9f1fd047b500137d021f882d93f03280118 (git)
Affected: 5.10.215 , < 5.10.229 (semver)
Affected: 5.15.154 , < 5.15.171 (semver)
Affected: 6.1.81 , < 6.1.116 (semver)
Affected: 6.6.21 , < 6.6.58 (semver)
Affected: 6.7.9 , < 6.8 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 5.10.229 , ≤ 5.10.* (semver)
Unaffected: 5.15.171 , ≤ 5.15.* (semver)
Unaffected: 6.1.116 , ≤ 6.1.* (semver)
Unaffected: 6.6.58 , ≤ 6.6.* (semver)
Unaffected: 6.11.5 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/bugs: Usar selector de segmento de c\u00f3digo para el operando VERW Robert Gill inform\u00f3 lo siguiente: #GP en modo de 32 bits cuando el software dosemu estaba ejecutando la llamada al sistema vm86(): error de protecci\u00f3n general: 0000 [#1] PREEMPT SMP CPU: 4 PID: 4610 Comm: dosemu.bin No contaminado 6.6.21-gentoo-x86 #1 Nombre del hardware: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 30/10/2010 EIP: restore_all_switch_stack+0xbe/0xcf EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046 CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0 Seguimiento de llamadas: show_regs+0x70/0x78 die_addr+0x29/0x70 exc_general_protection+0x13c/0x348 exc_bounds+0x98/0x98 handle_exception+0x14d/0x14d exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf Esto solo sucede en el modo de 32 bits cuando se habilitan las mitigaciones basadas en VERW como MDS/RFDS. Esto se debe a que los registros de segmento con un valor de usuario arbitrario pueden generar #GP al ejecutar VERW. Intel SDM vol. 2C documenta el siguiente comportamiento para la instrucci\u00f3n VERW: #GP(0) - Si la direcci\u00f3n efectiva de un operando de memoria est\u00e1 fuera del l\u00edmite de segmento CS, DS, ES, FS o GS. La macro CLEAR_CPU_BUFFERS ejecuta la instrucci\u00f3n VERW antes de regresar al espacio de usuario. Use el selector %cs para hacer referencia al operando VERW. Esto garantiza que VERW no genere #GP para un usuario arbitrario %ds. [ mingo: Se corrigi\u00f3 la cadena SOB. ]"
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      "id": "CVE-2024-50072",
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              "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",
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                    "versionType": "semver"
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                "vendor": "Linux",
                "versions": [
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                    "version": "6.8"
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                  {
                    "lessThan": "6.8",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.229",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.171",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.116",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.58",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.11.*",
                    "status": "unaffected",
                    "version": "6.11.5",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.12",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
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            "nodes": [
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                "negate": false,
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/bugs: Use code segment selector for VERW operand\n\nRobert Gill reported below #GP in 32-bit mode when dosemu software was\nexecuting vm86() system call:\n\n  general protection fault: 0000 [#1] PREEMPT SMP\n  CPU: 4 PID: 4610 Comm: dosemu.bin Not tainted 6.6.21-gentoo-x86 #1\n  Hardware name: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 10/30/2010\n  EIP: restore_all_switch_stack+0xbe/0xcf\n  EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000\n  ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc\n  DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046\n  CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0\n  Call Trace:\n   show_regs+0x70/0x78\n   die_addr+0x29/0x70\n   exc_general_protection+0x13c/0x348\n   exc_bounds+0x98/0x98\n   handle_exception+0x14d/0x14d\n   exc_bounds+0x98/0x98\n   restore_all_switch_stack+0xbe/0xcf\n   exc_bounds+0x98/0x98\n   restore_all_switch_stack+0xbe/0xcf\n\nThis only happens in 32-bit mode when VERW based mitigations like MDS/RFDS\nare enabled. This is because segment registers with an arbitrary user value\ncan result in #GP when executing VERW. Intel SDM vol. 2C documents the\nfollowing behavior for VERW instruction:\n\n  #GP(0) - If a memory operand effective address is outside the CS, DS, ES,\n\t   FS, or GS segment limit.\n\nCLEAR_CPU_BUFFERS macro executes VERW instruction before returning to user\nspace. Use %cs selector to reference VERW operand. This ensures VERW will\nnot #GP for an arbitrary user %ds.\n\n[ mingo: Fixed the SOB chain. ]"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/bugs: Usar selector de segmento de c\u00f3digo para el operando VERW Robert Gill inform\u00f3 lo siguiente: #GP en modo de 32 bits cuando el software dosemu estaba ejecutando la llamada al sistema vm86(): error de protecci\u00f3n general: 0000 [#1] PREEMPT SMP CPU: 4 PID: 4610 Comm: dosemu.bin No contaminado 6.6.21-gentoo-x86 #1 Nombre del hardware: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 30/10/2010 EIP: restore_all_switch_stack+0xbe/0xcf EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046 CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0 Seguimiento de llamadas: show_regs+0x70/0x78 die_addr+0x29/0x70 exc_general_protection+0x13c/0x348 exc_bounds+0x98/0x98 handle_exception+0x14d/0x14d exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf Esto solo sucede en el modo de 32 bits cuando se habilitan las mitigaciones basadas en VERW como MDS/RFDS. Esto se debe a que los registros de segmento con un valor de usuario arbitrario pueden generar #GP al ejecutar VERW. Intel SDM vol. 2C documenta el siguiente comportamiento para la instrucci\u00f3n VERW: #GP(0) - Si la direcci\u00f3n efectiva de un operando de memoria est\u00e1 fuera del l\u00edmite de segmento CS, DS, ES, FS o GS. La macro CLEAR_CPU_BUFFERS ejecuta la instrucci\u00f3n VERW antes de regresar al espacio de usuario. Use el selector %cs para hacer referencia al operando VERW. Esto garantiza que VERW no genere #GP para un usuario arbitrario %ds. [ mingo: Se corrigi\u00f3 la cadena SOB. ]"
          }
        ],
        "id": "CVE-2024-50072",
        "lastModified": "2026-06-17T08:03:30.740",
        "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": "2024-10-29T01:15:04.393",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/38c5fe74f3bef98f75d16effa49836d50c9b6097"
          },
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            "tags": [
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          },
          {
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          },
          {
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            "tags": [
              "Patch"
            ],
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          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:01:08+00:00",
      "cve": "CVE-2024-50072",
      "id": "CVE-2024-50072",
      "initial_release_date": "2024-10-29T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: x86/bugs: Use code segment selector for VERW operand",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-50072.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T13:51:54Z",
      "cve": "CVE-2024-50072",
      "id": "CVE-2024-50072",
      "initial_release_date": "2024-10-29T04:15:54Z",
      "product_status:known_not_affected": "561",
      "product_status:recommended": "6",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-50072",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-50072.json",
      "version": "31"
    }
  }
}



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Taxonomy of the tags.





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

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.


Detection rules are retrieved from Rulezet.


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.