CVE-2024-38602 (GCVE-0-2024-38602)

Vulnerability from cvelistv5 – Published: 2024-06-19 13:48 – Updated: 2026-05-23 15:49
VLAI
Title
ax25: Fix reference count leak issues of ax25_dev
Summary
In the Linux kernel, the following vulnerability has been resolved: ax25: Fix reference count leak issues of ax25_dev The ax25_addr_ax25dev() and ax25_dev_device_down() exist a reference count leak issue of the object "ax25_dev". Memory leak issue in ax25_addr_ax25dev(): The reference count of the object "ax25_dev" can be increased multiple times in ax25_addr_ax25dev(). This will cause a memory leak. Memory leak issues in ax25_dev_device_down(): The reference count of ax25_dev is set to 1 in ax25_dev_device_up() and then increase the reference count when ax25_dev is added to ax25_dev_list. As a result, the reference count of ax25_dev is 2. But when the device is shutting down. The ax25_dev_device_down() drops the reference count once or twice depending on if we goto unlock_put or not, which will cause memory leak. As for the issue of ax25_addr_ax25dev(), it is impossible for one pointer to be on a list twice. So add a break in ax25_addr_ax25dev(). As for the issue of ax25_dev_device_down(), increase the reference count of ax25_dev once in ax25_dev_device_up() and decrease the reference count of ax25_dev after it is removed from the ax25_dev_list.
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 17:13 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d01ffb9eee4af165d83b08dd73ebdf9fe94a519b , < ae467750a3765dd1092eb29f58247950a2f9b60c (git)
Affected: d01ffb9eee4af165d83b08dd73ebdf9fe94a519b , < 38eb01edfdaa1562fa00429be2e33f45383b1b3a (git)
Affected: d01ffb9eee4af165d83b08dd73ebdf9fe94a519b , < 81d8240b0a243b3ddd8fa8aa172f1acc2f7cc8f3 (git)
Affected: d01ffb9eee4af165d83b08dd73ebdf9fe94a519b , < 1ea02699c7557eeb35ccff2bd822de1b3e09d868 (git)
Affected: d01ffb9eee4af165d83b08dd73ebdf9fe94a519b , < b505e0319852b08a3a716b64620168eab21f4ced (git)
Affected: ef0a2a0565727a48f2e36a2c461f8b1e3a61922d (git)
Affected: e2b558fe507a1ed4c43db2b0057fc6e41f20a14c (git)
Affected: 418993bbaafb0cd48f904ba68eeda052d624c821 (git)
Affected: 5ea00fc60676c0eebfa8560ec461209d638bca9d (git)
Affected: 9af0fd5c4453a44c692be0cbb3724859b75d739b (git)
Affected: 4.14.277 , < 4.15 (semver)
Affected: 4.19.240 , < 4.20 (semver)
Affected: 5.4.190 , < 5.5 (semver)
Affected: 5.10.112 , < 5.11 (semver)
Affected: 5.15.35 , < 5.16 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.93 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.8.12 , ≤ 6.8.* (semver)
Unaffected: 6.9.3 , ≤ 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: ax25: soluciona problemas de p\u00e9rdida de recuento de referencias de ax25_dev. Ax25_addr_ax25dev() y ax25_dev_device_down() existen un problema de p\u00e9rdida de recuento de referencias del objeto \"ax25_dev\". Problema de p\u00e9rdida de memoria en ax25_addr_ax25dev(): el recuento de referencias del objeto \"ax25_dev\" se puede aumentar varias veces en ax25_addr_ax25dev(). Esto provocar\u00e1 una p\u00e9rdida de memoria. Problemas de p\u00e9rdida de memoria en ax25_dev_device_down(): el recuento de referencias de ax25_dev se establece en 1 en ax25_dev_device_up() y luego aumenta el recuento de referencias cuando se agrega ax25_dev a ax25_dev_list. Como resultado, el recuento de referencia de ax25_dev es 2. Pero cuando el dispositivo se est\u00e1 apagando. El ax25_dev_device_down() reduce el recuento de referencias una o dos veces dependiendo de si vamos a unlock_put o no, lo que provocar\u00e1 una p\u00e9rdida de memoria. En cuanto al problema de ax25_addr_ax25dev(), es imposible que un puntero est\u00e9 en una lista dos veces. Entonces agregue una interrupci\u00f3n en ax25_addr_ax25dev(). En cuanto al problema de ax25_dev_device_down(), aumente el recuento de referencias de ax25_dev una vez en ax25_dev_device_up() y disminuya el recuento de referencias de ax25_dev despu\u00e9s de que se elimine de ax25_dev_list."
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      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ax25: Fix reference count leak issues of ax25_dev",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-38602.json",
      "version": "3"
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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.


Detection rules are retrieved from Rulezet.


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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.