CVE Feed

    Dashboard / CVE / CVE-2015-7550

    CVE-2015-7550

    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.

    Published:Dec 10, 2015
    Last Modified:Apr 12, 2025
    EPS:Feb 8, 2016
    EPSS Score:0.00067
    CVSS Score:5.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-80925 — In the Linux kernel, the following vulnerability has been resolved: vlan: fix skb_under_panic and races when …
    CVE-2026-80924 (CVSS 7.5) — In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - use kfree_sensitive() for …
    CVE-2026-80923 — In the Linux kernel, the following vulnerability has been resolved: xhci: dbgtty: Fix unregister on tty_regis…
    CVE-2026-80922 — In the Linux kernel, the following vulnerability has been resolved: crypto: qcom-rng - Allow zero as a random…
    CVE-2026-80921 (CVSS 8.8) — In the Linux kernel, the following vulnerability has been resolved: KVM: s390: vsie: zero stale crypto bits …
    CVE-2026-80920 — In the Linux kernel, the following vulnerability has been resolved: io_uring: defer eventfd signaling when qu…
    CVE-2026-80919 — In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix recursive ww_mutex acquir…
    CVE-2026-80918 — In the Linux kernel, the following vulnerability has been resolved: HID: core: fix number/pointer type confus…
    CVE-2026-80917 — In the Linux kernel, the following vulnerability has been resolved: PCI: host-generic: Fix NULL pointer deref…
    CVE-2026-80916 — In the Linux kernel, the following vulnerability has been resolved: kcov: fix data corruption and race condit…

    References

    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d
    http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
    http://www.debian.org/security/2016/dsa-3434
    http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4
    http://www.securityfocus.com/bid/79903
    http://www.ubuntu.com/usn/USN-2888-1
    http://www.ubuntu.com/usn/USN-2890-1
    http://www.ubuntu.com/usn/USN-2890-2
    http://www.ubuntu.com/usn/USN-2890-3
    http://www.ubuntu.com/usn/USN-2911-1
    http://www.ubuntu.com/usn/USN-2911-2
    https://bugzilla.redhat.com/show_bug.cgi?id=1291197
    https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d
    https://security-tracker.debian.org/tracker/CVE-2015-7550
    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d
    http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
    http://www.debian.org/security/2016/dsa-3434
    http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4
    http://www.securityfocus.com/bid/79903
    http://www.ubuntu.com/usn/USN-2888-1
    http://www.ubuntu.com/usn/USN-2890-1
    http://www.ubuntu.com/usn/USN-2890-2
    http://www.ubuntu.com/usn/USN-2890-3
    http://www.ubuntu.com/usn/USN-2911-1
    http://www.ubuntu.com/usn/USN-2911-2
    https://bugzilla.redhat.com/show_bug.cgi?id=1291197
    https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d
    https://security-tracker.debian.org/tracker/CVE-2015-7550

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High