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CVE-2015-7550 (GCVE-0-2015-7550)

Vulnerability from cvelistv5 – Published: 2016-02-08 02:00 – Updated: 2024-08-06 07:51
VLAI
Summary
The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.
Severity
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Assigner
References
URL Tags
http://www.securityfocus.com/bid/79903 vdb-entryx_refsource_BID
http://www.kernel.org/pub/linux/kernel/v4.x/Chang… x_refsource_CONFIRM
http://www.ubuntu.com/usn/USN-2911-1 vendor-advisoryx_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2890-3 vendor-advisoryx_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://bugzilla.redhat.com/show_bug.cgi?id=1291197 x_refsource_CONFIRM
https://github.com/torvalds/linux/commit/b4a1b4f5… x_refsource_CONFIRM
http://www.ubuntu.com/usn/USN-2911-2 vendor-advisoryx_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://www.ubuntu.com/usn/USN-2890-2 vendor-advisoryx_refsource_UBUNTU
https://security-tracker.debian.org/tracker/CVE-2… x_refsource_CONFIRM
http://git.kernel.org/cgit/linux/kernel/git/torva… x_refsource_CONFIRM
http://www.ubuntu.com/usn/USN-2890-1 vendor-advisoryx_refsource_UBUNTU
http://www.debian.org/security/2016/dsa-3434 vendor-advisoryx_refsource_DEBIAN
http://www.ubuntu.com/usn/USN-2888-1 vendor-advisoryx_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
Date Public
2016-01-22 00:00
Show details on NVD website
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Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.debian.org/security/2016/dsa-3434\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://www.securityfocus.com/bid/79903\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2888-1\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2890-1\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2890-2\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2890-3\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2911-1\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2911-2\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1291197\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://security-tracker.debian.org/tracker/CVE-2015-7550\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.debian.org/security/2016/dsa-3434\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://www.securityfocus.com/bid/79903\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2888-1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2890-1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2890-2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2890-3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2911-1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2911-2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1291197\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security-tracker.debian.org/tracker/CVE-2015-7550\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}],\"evaluatorComment\":\"\u003ca href=\\\"http://cwe.mitre.org/data/definitions/476.html\\\"\u003eCWE-476: NULL Pointer Dereference\u003c/a\u003e\"}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T12:10:19+00:00",
      "cve": "CVE-2015-7550",
      "id": "CVE-2015-7550",
      "initial_release_date": "2015-12-10T00:00:00+00:00",
      "product_status:known_affected": "55",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: User triggerable crash from race between key read and rey revoke",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-7550.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T02:26:49Z",
      "cve": "CVE-2015-7550",
      "id": "CVE-2015-7550",
      "initial_release_date": "2023-02-15T05:13:54Z",
      "product_status:known_not_affected": "211",
      "product_status:recommended": "440",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2015-7550",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2015-7550.json",
      "version": "24"
    }
  }
}



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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.


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.