CVE-2024-26993 (GCVE-0-2024-26993)

Vulnerability from cvelistv5 – Published: 2024-05-01 05:28 – Updated: 2026-05-23 15:40
VLAI
Title
fs: sysfs: Fix reference leak in sysfs_break_active_protection()
Summary
In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < f28bba37fe244889b81bb5c508d3f6e5c6e342c5 (git)
Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < 57baab0f376bec8f54b0fe6beb8f77a57c228063 (git)
Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < 84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17 (git)
Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < 43f00210cb257bcb0387e8caeb4b46375d67f30c (git)
Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < 5d43e072285e81b0b63cee7189b3357c7768a43b (git)
Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < ac107356aabc362aaeb77463e814fc067a5d3957 (git)
Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < a4c99b57d43bab45225ba92d574a8683f9edc8e4 (git)
Affected: 2afc9166f79b8f6da5f347f48515215ceee4ae37 , < a90bca2228c0646fc29a72689d308e5fe03e6d78 (git)
Affected: e8a37b2fd5b5087bec6cbbf6946ee3caa712953b (git)
Affected: a6abc93760dd07fcd29760b70e6e7520f22cb288 (git)
Affected: 461a6385e58e8247e6ba2005aa5d1b8d980ee4a2 (git)
Affected: 8a5e02a0f46ea33ed19e48e096a8e8d28e73d10a (git)
Affected: c984f4d1d40a2f349503b3faf946502ccbf02f9f (git)
Affected: 807d1d299a04e9ad9a9dac55419c1137a105254b (git)
Affected: 3.16.62 , < 3.17 (semver)
Affected: 3.18.121 , < 3.19 (semver)
Affected: 4.4.154 , < 4.5 (semver)
Affected: 4.9.125 , < 4.10 (semver)
Affected: 4.14.68 , < 4.15 (semver)
Affected: 4.18.6 , < 4.19 (semver)
Create a notification for this product.
Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 4.19.313 , ≤ 4.19.* (semver)
Unaffected: 5.4.275 , ≤ 5.4.* (semver)
Unaffected: 5.10.216 , ≤ 5.10.* (semver)
Unaffected: 5.15.157 , ≤ 5.15.* (semver)
Unaffected: 6.1.88 , ≤ 6.1.* (semver)
Unaffected: 6.6.29 , ≤ 6.6.* (semver)
Unaffected: 6.8.8 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.1 (custom)
Create a notification for this product.
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Unaffected: 0 , < * (custom)
Create a notification for this product.
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.1 (custom)
Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
Create a notification for this product.
Show details on NVD website
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      "id": "CVE-2024-26993",
      "lastModified": "2024-12-23T20:43:56.733",
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As a result, the\\nreference to kobj acquired at the start of the function will never be\\nreleased.\\n\\nFix the leak by adding an explicit kobject_put() call when kn is NULL.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs: sysfs: corrige la fuga de referencia en sysfs_break_active_protection() La rutina sysfs_break_active_protection() tiene una fuga de referencia obvia en su ruta de error. Si la llamada a kernfs_find_and_get() falla, entonces kn ser\u00e1 NULL, por lo que no se llamar\u00e1 a la rutina complementaria sysfs_unbreak_active_protection() (y solo causar\u00eda una infracci\u00f3n de acceso al intentar eliminar la referencia a kn-\u0026gt;parent si se llamara). Como resultado, la referencia a kobj adquirida al inicio de la funci\u00f3n nunca se publicar\u00e1. 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      "cveMetadata": "{\"cveId\": \"CVE-2024-26993\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-23T15:40:53.659Z\", \"dateReserved\": \"2024-02-19T14:20:24.206Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-01T05:28:02.462Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.





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.