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    CVE-2015-1781

    Buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response, which triggers a call with a misaligned buffer.

    Published:Apr 21, 2015
    Last Modified:Apr 12, 2025
    EPS:Sep 28, 2015
    EPSS Score:0.05081
    CVSS Score:6.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Gnu
    Product
    Glibc
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Suse
    Product
    Linux Enterprise Debuginfo
    Vendor
    Suse
    Product
    Linux Enterprise Desktop
    Vendor
    Suse
    Product
    Linux Enterprise Server

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
    http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html
    http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
    http://www.debian.org/security/2016/dsa-3480
    http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
    http://www.securityfocus.com/bid/74255
    http://www.securitytracker.com/id/1032178
    http://www.ubuntu.com/usn/USN-2985-1
    http://www.ubuntu.com/usn/USN-2985-2
    https://rhn.redhat.com/errata/RHSA-2015-0863.html
    https://security.gentoo.org/glsa/201602-02
    https://sourceware.org/bugzilla/show_bug.cgi?id=18287
    https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=2959eda9272a03386
    https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
    http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html
    http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
    http://www.debian.org/security/2016/dsa-3480
    http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
    http://www.securityfocus.com/bid/74255
    http://www.securitytracker.com/id/1032178
    http://www.ubuntu.com/usn/USN-2985-1
    http://www.ubuntu.com/usn/USN-2985-2
    https://rhn.redhat.com/errata/RHSA-2015-0863.html
    https://security.gentoo.org/glsa/201602-02
    https://sourceware.org/bugzilla/show_bug.cgi?id=18287
    https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=2959eda9272a03386
    https://www.sourceware.org/ml/libc-alpha/2015-08/msg00609.html

    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