CVE-2024-46713 (GCVE-0-2024-46713)

Vulnerability from cvelistv5 – Published: 2024-09-13 14:49 – Updated: 2026-08-05 11:38
VLAI
Title
perf/aux: Fix AUX buffer serialization
Summary
In the Linux kernel, the following vulnerability has been resolved: perf/aux: Fix AUX buffer serialization Ole reported that event->mmap_mutex is strictly insufficient to serialize the AUX buffer, add a per RB mutex to fully serialize it. Note that in the lock order comment the perf_event::mmap_mutex order was already wrong, that is, it nesting under mmap_lock is not new with this patch.
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: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 14:58 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 45bfb2e50471abbbfd83d40d28c986078b0d24ff , < 7882923f1cb88dc1a17f2bf0c81b1fc80d44db82 (git)
Affected: 45bfb2e50471abbbfd83d40d28c986078b0d24ff , < 52d13d224fdf1299c8b642807fa1ea14d693f5ff (git)
Affected: 45bfb2e50471abbbfd83d40d28c986078b0d24ff , < 9dc7ad2b67772cfb94ceb3b0c9c4023c2463215d (git)
Affected: 45bfb2e50471abbbfd83d40d28c986078b0d24ff , < c4b69bee3f4ef76809288fe6827bc14d4ae788ef (git)
Affected: 45bfb2e50471abbbfd83d40d28c986078b0d24ff , < b9b6882e243b653d379abbeaa64a500182aba370 (git)
Affected: 45bfb2e50471abbbfd83d40d28c986078b0d24ff , < 2ab9d830262c132ab5db2f571003d80850d56b2a (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.167 , ≤ 5.15.* (semver)
Unaffected: 6.1.110 , ≤ 6.1.* (semver)
Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: perf/aux: Se corrige la serializaci\u00f3n del b\u00fafer AUX. Ole inform\u00f3 que event-\u0026gt;mmap_mutex es estrictamente insuficiente para serializar el b\u00fafer AUX, agregue un mutex por RB para serializarlo por completo. Tenga en cuenta que en el comentario de orden de bloqueo, el orden perf_event::mmap_mutex ya estaba mal, es decir, su anidaci\u00f3n bajo mmap_lock no es nueva con este parche."
          }
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          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
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    },
    "redhat_vex": {
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      "current_release_date": "2026-09-13T09:01:15+00:00",
      "cve": "CVE-2024-46713",
      "id": "CVE-2024-46713",
      "initial_release_date": "2024-09-13T00:00:00+00:00",
      "product_status:fixed": "280",
      "product_status:known_affected": "112",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: perf/aux: Fix AUX buffer serialization",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-46713.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-03T16:40:03Z",
      "cve": "CVE-2024-46713",
      "id": "CVE-2024-46713",
      "initial_release_date": "2024-09-14T02:50:42Z",
      "product_status:known_affected": "803",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "389",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-46713",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-46713.json",
      "version": "65"
    },
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              "dateUpdated": "2025-11-03T22:16:42.290Z",
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            },
            "references": [
              {
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              },
              {
                "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"
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            ],
            "title": "CVE Program Container"
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                    "id": "CVE-2024-46713",
                    "options": [
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                      },
                      {
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                      },
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                      }
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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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                  "value": "AV:L - The bug is triggered purely through the local perf_event_open(2) syscall plus mmap/munmap on the resulting file descriptor; there is no network or remote path to the perf AUX buffer code.\nAC:L - The attacker controls both sides of the race, spawning two threads that concurrently mmap and close the same shared AUX buffer (linked via PERF_EVENT_IOC_SET_OUTPUT), and can retry freely, so triggering the unserialized window is reliable.\nPR:L - An unprivileged local user can open an AUX-capable per-task perf event (e.g. self-tracing) under common perf_event_paranoid settings and set up the shared ring buffer; no real root or init-namespace admin capability is required.\nUI:N - The attacker performs all syscalls itself; no victim action or interaction is needed to trigger the race.\nS:U - The corruption stays within the kernel\u0027s own security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The race yields a use-after-free of freed AUX kernel heap pages, which can be reallocated and read back, giving an attacker control over freed object contents and enabling kernel memory disclosure.\nI:H - The UAF/double-free on AUX pages and rb refcount corruption provides a write primitive over reclaimed kernel heap memory, exploitable via heap grooming for arbitrary writes and control-flow hijacking.\nA:H - The use-after-free and refcount underflow reliably corrupt kernel memory, causing oops/panic and full denial of service even when not fully weaponized."
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}



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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

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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.



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.