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CVE-2024-38385 (GCVE-0-2024-38385)

Vulnerability from cvelistv5 – Published: 2024-06-25 14:22 – Updated: 2026-08-05 11:32
VLAI
Title
genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()
Summary
In the Linux kernel, the following vulnerability has been resolved: genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after() irq_find_at_or_after() dereferences the interrupt descriptor which is returned by mt_find() while neither holding sparse_irq_lock nor RCU read lock, which means the descriptor can be freed between mt_find() and the dereference: CPU0 CPU1 desc = mt_find() delayed_free_desc(desc) irq_desc_get_irq(desc) The use-after-free is reported by KASAN: Call trace: irq_get_next_irq+0x58/0x84 show_stat+0x638/0x824 seq_read_iter+0x158/0x4ec proc_reg_read_iter+0x94/0x12c vfs_read+0x1e0/0x2c8 Freed by task 4471: slab_free_freelist_hook+0x174/0x1e0 __kmem_cache_free+0xa4/0x1dc kfree+0x64/0x128 irq_kobj_release+0x28/0x3c kobject_put+0xcc/0x1e0 delayed_free_desc+0x14/0x2c rcu_do_batch+0x214/0x720 Guard the access with a RCU read lock section.
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 2024-09-10 17:08 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 721255b9826bd11c7a38b585905fc2dd0fb94e52 , < 1c7891812d85500ae2ca4051fa5683fcf29930d8 (git)
Affected: 721255b9826bd11c7a38b585905fc2dd0fb94e52 , < d084aa022f84319f8079e30882cbcbc026af9f21 (git)
Affected: 721255b9826bd11c7a38b585905fc2dd0fb94e52 , < b84a8aba806261d2f759ccedf4a2a6a80a5e55ba (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.6.34 , ≤ 6.6.* (semver)
Unaffected: 6.9.5 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: genirq/irqdesc: Impide el use-after-free en irq_find_at_or_after() irq_find_at_or_after() elimina la referencia al descriptor de interrupci\u00f3n que devuelve mt_find() mientras no mantiene sparse_irq_lock ni el bloqueo de lectura de RCU, lo que significa que el descriptor se puede liberar entre mt_find() y la desreferencia: CPU0 CPU1 desc = mt_find() delay_free_desc(desc) irq_desc_get_irq(desc) KASAN informa el use-after-free: Rastreo de llamadas: irq_get_next_irq+0x58/0x84 show_stat+ 0x638/0x824 seq_read_iter+0x158/0x4ec proc_reg_read_iter+0x94/0x12c vfs_read+0x1e0/0x2c8 Liberado por la tarea 4471: slab_free_freelist_hook+0x174/0x1e0 __kmem_cache_free+0xa4/0x1dc x64/0x128 irq_kobj_release+0x28/0x3c kobject_put+0xcc/0x1e0 retardado_free_desc+ 0x14/0x2c rcu_do_batch+0x214/0x720 Protege el acceso con una secci\u00f3n de bloqueo de lectura de RCU."
          }
        ],
        "id": "CVE-2024-38385",
        "lastModified": "2026-08-04T11:18:40.573",
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      "product_status:known_affected": "28",
      "product_status:known_not_affected": "170",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-38385.json",
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      "product_status:recommended": "353",
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              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngenirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()\n\nirq_find_at_or_after() dereferences the interrupt descriptor which is\nreturned by mt_find() while neither holding sparse_irq_lock nor RCU read\nlock, which means the descriptor can be freed between mt_find() and the\ndereference:\n\n    CPU0                            CPU1\n    desc = mt_find()\n                                    delayed_free_desc(desc)\n    irq_desc_get_irq(desc)\n\nThe use-after-free is reported by KASAN:\n\n    Call trace:\n     irq_get_next_irq+0x58/0x84\n     show_stat+0x638/0x824\n     seq_read_iter+0x158/0x4ec\n     proc_reg_read_iter+0x94/0x12c\n     vfs_read+0x1e0/0x2c8\n\n    Freed by task 4471:\n     slab_free_freelist_hook+0x174/0x1e0\n     __kmem_cache_free+0xa4/0x1dc\n     kfree+0x64/0x128\n     irq_kobj_release+0x28/0x3c\n     kobject_put+0xcc/0x1e0\n     delayed_free_desc+0x14/0x2c\n     rcu_do_batch+0x214/0x720\n\nGuard the access with a RCU read lock section."
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        "assignerShortName": "Linux",
        "cveId": "CVE-2024-38385",
        "datePublished": "2024-06-25T14:22:37.560Z",
        "dateReserved": "2024-06-24T13:54:11.033Z",
        "dateUpdated": "2026-05-11T20:18:33.139Z",
        "state": "PUBLISHED"
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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.
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  • 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.


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