CVE-2024-44968 (GCVE-0-2024-44968)

Vulnerability from cvelistv5 – Published: 2024-09-04 18:56 – Updated: 2026-05-11 20:32
VLAI
Title
tick/broadcast: Move per CPU pointer access into the atomic section
Summary
In the Linux kernel, the following vulnerability has been resolved: tick/broadcast: Move per CPU pointer access into the atomic section The recent fix for making the take over of the broadcast timer more reliable retrieves a per CPU pointer in preemptible context. This went unnoticed as compilers hoist the access into the non-preemptible region where the pointer is actually used. But of course it's valid that the compiler keeps it at the place where the code puts it which rightfully triggers: BUG: using smp_processor_id() in preemptible [00000000] code: caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Move it to the actual usage site which is in a non-preemptible region.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:39 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dfe19aa91378972f10530635ad83b2d77f481044 , < f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 (git)
Affected: 457a1c87d454455d671a3045cf0b56157be110a1 , < f91fb47ecacc178a83a77eeebd25cbaec18c01d6 (git)
Affected: 9ef7190228145f959d9bc0ddca40ecf76bb413b0 , < 668c6c4a7e9e9f081c06b70f30104fb7013437ed (git)
Affected: d3b165c10473aa6fc6141bb5b1f6e5b50c1fb774 , < 541a900d245536d4809cb1aa322c3fcc2cdb58a6 (git)
Affected: 408bfb6b0a7f22e971ce6b600aec448769e580a8 , < 7b3ec186ba93e333e9efe7254e7e31c1828e5d2d (git)
Affected: 3a58c590f6bd1d20eb1e76c5cea31c36cc032339 , < b9d604933d5fd72dd37f24e1dc35f778297d745a (git)
Affected: 2cdab4b4bf77369961f706cdeb7d040db10c5217 , < 7dd12f85f150010ef7518201c63fa7e395f5c3e9 (git)
Affected: f7d43dd206e7e18c182f200e67a8db8c209907fa , < 6881e75237a84093d0986f56223db3724619f26e (git)
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Linux Linux Affected: 6.1.103 , < 6.1.105 (semver)
Affected: 6.6.44 , < 6.6.46 (semver)
Affected: 6.10.3 , < 6.10.5 (semver)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntick/broadcast: Move per CPU pointer access into the atomic section\n\nThe recent fix for making the take over of the broadcast timer more\nreliable retrieves a per CPU pointer in preemptible context.\n\nThis went unnoticed as compilers hoist the access into the non-preemptible\nregion where the pointer is actually used. But of course it\u0027s valid that\nthe compiler keeps it at the place where the code puts it which rightfully\ntriggers:\n\n  BUG: using smp_processor_id() in preemptible [00000000] code:\n       caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0\n\nMove it to the actual usage site which is in a non-preemptible region."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tick/broadcast: mover el acceso al puntero por CPU a la secci\u00f3n at\u00f3mica La soluci\u00f3n reciente para hacer que la toma de control del temporizador de difusi\u00f3n sea m\u00e1s fiable recupera un puntero por CPU en un contexto preemptible. Esto pas\u00f3 desapercibido ya que los compiladores elevan el acceso a la regi\u00f3n no preemptible donde realmente se usa el puntero. Pero, por supuesto, es v\u00e1lido que el compilador lo mantenga en el lugar donde lo pone el c\u00f3digo, lo que activa correctamente: ERROR: usar smp_processor_id() en c\u00f3digo preemptible [00000000]: el llamador es hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Mu\u00e9valo al sitio de uso real que est\u00e1 en una regi\u00f3n no preemptible."
          }
        ],
        "id": "CVE-2024-44968",
        "lastModified": "2026-06-17T07:53:19.660",
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                "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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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "product_status:known_affected": "28",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-44968.json",
      "version": "3"
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      "current_release_date": "2026-09-02T01:26:38Z",
      "cve": "CVE-2024-44968",
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      "initial_release_date": "2024-09-05T02:47:00Z",
      "product_status:known_not_affected": "399",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-44968",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2024/cve-2024-44968.json",
      "version": "19"
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              "shortName": "CISA-ADP"
            },
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  }
}



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Tags
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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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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