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CVE-2022-49870 (GCVE-0-2022-49870)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-11 19:08
VLAI
Title
capabilities: fix undefined behavior in bit shift for CAP_TO_MASK
Summary
In the Linux kernel, the following vulnerability has been resolved: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN: shift-out-of-bounds in security/commoncap.c:1252:2 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c cap_task_prctl+0x561/0x6f0 security_task_prctl+0x5a/0xb0 __x64_sys_prctl+0x61/0x8f0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < 5b79fa628e2ab789e629a83cd211ef9b4c1a593e (git)
Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < 65b0bc7a0690861812ade523d19f82688ab819dc (git)
Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < dbaab08c8677d598244d21afb7818e44e1c5d826 (git)
Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < 5661f111a1616ac105ec8cec81bff99b60f847ac (git)
Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < fcbd2b336834bd24e1d9454ad5737856470c10d7 (git)
Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < 151dc8087b5609e53b069c068e3f3ee100efa586 (git)
Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < 27bdb134c043ff32c459d98f16550d0ffa0b3c34 (git)
Affected: e338d263a76af78fe8f38a72131188b58fceb591 , < 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13 (git)
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Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 4.9.334 , ≤ 4.9.* (semver)
Unaffected: 4.14.300 , ≤ 4.14.* (semver)
Unaffected: 4.19.267 , ≤ 4.19.* (semver)
Unaffected: 5.4.225 , ≤ 5.4.* (semver)
Unaffected: 5.10.155 , ≤ 5.10.* (semver)
Unaffected: 5.15.79 , ≤ 5.15.* (semver)
Unaffected: 6.0.9 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncapabilities: fix undefined behavior in bit shift for CAP_TO_MASK\n\nShifting signed 32-bit value by 31 bits is undefined, so changing\nsignificant bit to unsigned. The UBSAN warning calltrace like below:\n\nUBSAN: shift-out-of-bounds in security/commoncap.c:1252:2\nleft shift of 1 by 31 places cannot be represented in type \u0027int\u0027\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x7d/0xa5\n dump_stack+0x15/0x1b\n ubsan_epilogue+0xe/0x4e\n __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c\n cap_task_prctl+0x561/0x6f0\n security_task_prctl+0x5a/0xb0\n __x64_sys_prctl+0x61/0x8f0\n do_syscall_64+0x58/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n \u003c/TASK\u003e"
          },
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            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: capacidades: corregir comportamiento indefinido en el cambio de bits para CAP_TO_MASK El cambio de un valor con signo de 32 bits por 31 bits no est\u00e1 definido, por lo que se cambia el bit significativo a sin signo. El seguimiento de llamadas de advertencia de UBSAN como se muestra a continuaci\u00f3n: UBSAN: desplazamiento fuera de los l\u00edmites en security/commoncap.c:1252:2 El desplazamiento a la izquierda de 1 por 31 lugares no se puede representar en el tipo \u0027int\u0027 Seguimiento de llamadas: dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c cap_task_prctl+0x561/0x6f0 security_task_prctl+0x5a/0xb0 __x64_sys_prctl+0x61/0x8f0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd  "
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        "id": "CVE-2022-49870",
        "lastModified": "2026-06-17T05:19:22.170",
        "metrics": {
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                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-05-01T15:16:11.937",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/151dc8087b5609e53b069c068e3f3ee100efa586"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/27bdb134c043ff32c459d98f16550d0ffa0b3c34"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5661f111a1616ac105ec8cec81bff99b60f847ac"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5b79fa628e2ab789e629a83cd211ef9b4c1a593e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/65b0bc7a0690861812ade523d19f82688ab819dc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dbaab08c8677d598244d21afb7818e44e1c5d826"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/fcbd2b336834bd24e1d9454ad5737856470c10d7"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:29:09+00:00",
      "cve": "CVE-2022-49870",
      "id": "CVE-2022-49870",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49870.json",
      "version": "3"
    }
  }
}



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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.