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CVE-2022-49611 (GCVE-0-2022-49611)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-05-23 15:22
VLAI
Title
x86/speculation: Fill RSB on vmexit for IBRS
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/speculation: Fill RSB on vmexit for IBRS Prevent RSB underflow/poisoning attacks with RSB. While at it, add a bunch of comments to attempt to document the current state of tribal knowledge about RSB attacks and what exactly is being mitigated.
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: b9cdaaf0a3becc52e8b4662fef28c452c4f009b4 , < 3d323b99ff5c8c57005184056d65f6af5b0479d8 (git)
Affected: 117cc7a908c83697b0b737d15ae1eb5943afe35b , < f744b88dfc201bf8092833ec70b23c720188b527 (git)
Affected: 117cc7a908c83697b0b737d15ae1eb5943afe35b , < 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0 (git)
Affected: 117cc7a908c83697b0b737d15ae1eb5943afe35b , < 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153 (git)
Affected: 117cc7a908c83697b0b737d15ae1eb5943afe35b , < 8d5cff499a6d740c91ff37963907e0e983c37f0f (git)
Affected: 117cc7a908c83697b0b737d15ae1eb5943afe35b , < 8c38306e2e9257af4af2819aa287a4711ff36329 (git)
Affected: 117cc7a908c83697b0b737d15ae1eb5943afe35b , < 9756bba28470722dacb79ffce554336dd1f6a6cd (git)
Affected: 68d1f7a3f1a35639a563bbad768d5df885b4ff05 (git)
Affected: 20e080e2752d108388d386ecc0b33d7797dfb18f (git)
Affected: eebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4 (git)
Affected: c1ddd99a029636e234a800f28790a60d6ac0318f (git)
Affected: 4.14.14 , < 4.14.297 (semver)
Affected: 3.2.101 , < 3.3 (semver)
Affected: 3.16.56 , < 3.17 (semver)
Affected: 4.4.113 , < 4.5 (semver)
Affected: 4.9.77 , < 4.10 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 4.14.297 , ≤ 4.14.* (semver)
Unaffected: 4.19.266 , ≤ 4.19.* (semver)
Unaffected: 5.4.217 , ≤ 5.4.* (semver)
Unaffected: 5.10.133 , ≤ 5.10.* (semver)
Unaffected: 5.15.57 , ≤ 5.15.* (semver)
Unaffected: 5.18.14 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (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\nx86/speculation: Fill RSB on vmexit for IBRS\n\nPrevent RSB underflow/poisoning attacks with RSB.  While at it, add a\nbunch of comments to attempt to document the current state of tribal\nknowledge about RSB attacks and what exactly is being mitigated."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/speculation: Fill RSB on vmexit for IBRS Prevenir ataques de envenenamiento/subdesbordamiento de RSB con RSB. Mientras tanto, agregue una serie de comentarios para intentar documentar el estado actual del conocimiento tribal sobre los ataques RSB y qu\u00e9 se est\u00e1 mitigando exactamente."
          }
        ],
        "id": "CVE-2022-49611",
        "lastModified": "2026-06-17T05:18:37.537",
        "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": "2025-02-26T07:01:36.553",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/17a9fc4a7b91f8599223631bb6ae6416bc0de1c0"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/3d323b99ff5c8c57005184056d65f6af5b0479d8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4d7f72b6e1bc630bec7e4cd51814bc2b092bf153"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8c38306e2e9257af4af2819aa287a4711ff36329"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8d5cff499a6d740c91ff37963907e0e983c37f0f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9756bba28470722dacb79ffce554336dd1f6a6cd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f744b88dfc201bf8092833ec70b23c720188b527"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:13:11+00:00",
      "cve": "CVE-2022-49611",
      "id": "CVE-2022-49611",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "415",
      "product_status:known_affected": "166",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: x86/speculation: Fill RSB on vmexit for IBRS",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49611.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:27:01Z",
      "cve": "CVE-2022-49611",
      "id": "CVE-2022-49611",
      "initial_release_date": "2025-02-27T03:04:14Z",
      "product_status:known_not_affected": "308",
      "product_status:recommended": "305",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49611",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49611.json",
      "version": "51"
    }
  }
}



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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.