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CVE-2022-49413 (GCVE-0-2022-49413)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:12 – Updated: 2026-08-05 08:55
VLAI
Title
bfq: Update cgroup information before merging bio
Summary
In the Linux kernel, the following vulnerability has been resolved: bfq: Update cgroup information before merging bio When the process is migrated to a different cgroup (or in case of writeback just starts submitting bios associated with a different cgroup) bfq_merge_bio() can operate with stale cgroup information in bic. Thus the bio can be merged to a request from a different cgroup or it can result in merging of bfqqs for different cgroups or bfqqs of already dead cgroups and causing possible use-after-free issues. Fix the problem by updating cgroup information in bfq_merge_bio().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 18:16 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e21b7a0b988772e82e7147e1c659a5afe2ae003c , < da9f3025d595956410ceaab2bea01980d7775948 (git)
Affected: e21b7a0b988772e82e7147e1c659a5afe2ae003c , < b06691af08b41dfd81052a3362514d9827b44bb1 (git)
Affected: e21b7a0b988772e82e7147e1c659a5afe2ae003c , < e8821f45612f2e6d9adb9c6ba0fb4184f57692aa (git)
Affected: e21b7a0b988772e82e7147e1c659a5afe2ae003c , < d9165200c5627a2cf4408eefabdf0058bdf95e1a (git)
Affected: e21b7a0b988772e82e7147e1c659a5afe2ae003c , < 2a1077f17169a6059992a0bbdb330e0abad1e6d9 (git)
Affected: e21b7a0b988772e82e7147e1c659a5afe2ae003c , < ea591cd4eb270393810e7be01feb8fde6a34fbbe (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.121 , ≤ 5.10.* (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ea591cd4eb270393810e7be01feb8fde6a34fbbe"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:29:01+00:00",
      "cve": "CVE-2022-49413",
      "id": "CVE-2022-49413",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "166",
      "product_status:known_affected": "70",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bfq: Update cgroup information before merging bio",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49413.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-03T00:39:09Z",
      "cve": "CVE-2022-49413",
      "id": "CVE-2022-49413",
      "initial_release_date": "2025-02-27T03:07:19Z",
      "product_status:known_affected": "451",
      "product_status:known_not_affected": "200",
      "product_status:recommended": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49413",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49413.json",
      "version": "58"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-49413",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-02-27T18:16:22.832240Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-416",
                    "description": "CWE-416 Use After Free",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-02-27T18:16:24.044Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "block/bfq-iosched.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "da9f3025d595956410ceaab2bea01980d7775948",
                  "status": "affected",
                  "version": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
                  "versionType": "git"
                },
                {
                  "lessThan": "b06691af08b41dfd81052a3362514d9827b44bb1",
                  "status": "affected",
                  "version": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
                  "versionType": "git"
                },
                {
                  "lessThan": "e8821f45612f2e6d9adb9c6ba0fb4184f57692aa",
                  "status": "affected",
                  "version": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
                  "versionType": "git"
                },
                {
                  "lessThan": "d9165200c5627a2cf4408eefabdf0058bdf95e1a",
                  "status": "affected",
                  "version": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
                  "versionType": "git"
                },
                {
                  "lessThan": "2a1077f17169a6059992a0bbdb330e0abad1e6d9",
                  "status": "affected",
                  "version": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
                  "versionType": "git"
                },
                {
                  "lessThan": "ea591cd4eb270393810e7be01feb8fde6a34fbbe",
                  "status": "affected",
                  "version": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "block/bfq-iosched.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.12"
                },
                {
                  "lessThan": "4.12",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.198",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.121",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.46",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.17.*",
                  "status": "unaffected",
                  "version": "5.17.14",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.18.*",
                  "status": "unaffected",
                  "version": "5.18.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.19",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.198",
                      "versionStartIncluding": "4.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.121",
                      "versionStartIncluding": "4.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.46",
                      "versionStartIncluding": "4.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.17.14",
                      "versionStartIncluding": "4.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18.3",
                      "versionStartIncluding": "4.12",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.19",
                      "versionStartIncluding": "4.12",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbfq: Update cgroup information before merging bio\n\nWhen the process is migrated to a different cgroup (or in case of\nwriteback just starts submitting bios associated with a different\ncgroup) bfq_merge_bio() can operate with stale cgroup information in\nbic. Thus the bio can be merged to a request from a different cgroup or\nit can result in merging of bfqqs for different cgroups or bfqqs of\nalready dead cgroups and causing possible use-after-free issues. Fix the\nproblem by updating cgroup information in bfq_merge_bio()."
            }
          ],
          "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 - The bug is in BFQ\u0027s bio-merge path (bfq_bio_merge), reached only when a local process submits block I/O via write/fsync/etc. through submit_bio \u2192 blk_mq_submit_bio \u2192 blk_mq_sched_bio_merge; it is not reachable from network protocol parsers.\nAC:L - After a cgroup change (or writeback bios for a different cgroup), the bic retains stale cgroup/bfqq state and the next mergeable bio reliably uses it; an attacker who migrates within a delegated cgroup tree and issues I/O controls both sides, so success does not depend on uncontrolled conditions.\nPR:L - Any unprivileged local user can submit I/O into BFQ, and cgroup moves that desync bic state are achievable without real root via delegated cgroup subtrees (containers, systemd user sessions, Android app cgroups).\nUI:N - Exploitation requires only the attacker\u0027s own I/O and cgroup operations; no separate victim action is needed.\nS:U - Impact is confined to the host kernel\u0027s block/cgroup authority (local memory corruption / privilege escalation); it does not cross a VM, IOMMU, or other security boundary.\nC:H - The commit describes merging against bfqqs of already-dead cgroups, i.e. a use-after-free, which per scoring guidance enables attacker-controlled object reuse and arbitrary kernel read primitives.\nI:H - The same UAF on bfqq/bfqg structures enables heap spray and arbitrary write / control-flow hijacking in the kernel, not merely incorrect accounting.\nA:H - Use-after-free on freed BFQ cgroup queue structures can oops/panic the kernel (as shown by related BFQ cgroup UAF KASAN reports in the same fix series)."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:55:07.478Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/da9f3025d595956410ceaab2bea01980d7775948"
            },
            {
              "url": "https://git.kernel.org/stable/c/b06691af08b41dfd81052a3362514d9827b44bb1"
            },
            {
              "url": "https://git.kernel.org/stable/c/e8821f45612f2e6d9adb9c6ba0fb4184f57692aa"
            },
            {
              "url": "https://git.kernel.org/stable/c/d9165200c5627a2cf4408eefabdf0058bdf95e1a"
            },
            {
              "url": "https://git.kernel.org/stable/c/2a1077f17169a6059992a0bbdb330e0abad1e6d9"
            },
            {
              "url": "https://git.kernel.org/stable/c/ea591cd4eb270393810e7be01feb8fde6a34fbbe"
            }
          ],
          "title": "bfq: Update cgroup information before merging bio",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49413",
        "datePublished": "2025-02-26T02:12:34.604Z",
        "dateReserved": "2025-02-26T02:08:31.567Z",
        "dateUpdated": "2026-08-05T08:55:07.478Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.