rhsa-2017_0372
Vulnerability from csaf_redhat
Published
2017-03-02 17:04
Modified
2024-11-14 21:42
Summary
Red Hat Security Advisory: kernel-aarch64 security and bug fix update

Notes

Topic
An update for kernel-aarch64 is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The kernel-aarch64 package contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system. (CVE-2016-5195, Important) * Linux kernel built with the 802.1Q/802.1ad VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local Area Network(CONFIG_VXLAN) with Transparent Ethernet Bridging(TEB) GRO support, is vulnerable to a stack overflow issue. It could occur while receiving large packets via GRO path, as an unlimited recursion could unfold in both VLAN and TEB modules, leading to a stack corruption in the kernel. (CVE-2016-7039, Important) Red Hat would like to thank Phil Oester for reporting CVE-2016-5195. Bug Fix(es): * Previously, the operating system did not support the Mellanox ConnectX-4 PCIe Network Interface Controllers (NIC) in Ethernet mode. This update enables Ethernet support in the mlx5 driver. As a result, the Mellanox ConnectX-4 PCIe NICs now work in Ethernet mode as expected. (BZ#1413108) * On the Qualcomm Datacenter Technologies server platform with Qualcomm Datacenter Technologies Centriq 2400 CPU (QDF2400v1) memory accesses sometimes allocated Translation Lookaside Buffer (TLB) entries using an incorrect Address Space ID (ASID). This could consequently result in memory corruption and crashes under certain conditions. The underlying source code has been modified to handle the TTBRx_EL1[ASID] and TTBRx_EL1[BADDR] fields separately using a reserved ASID, and the described problem no longer occurs. (BZ#1421765)
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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        "text": "The kernel-aarch64 package contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* A race condition was found in the way the Linux kernel\u0027s memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system. (CVE-2016-5195, Important)\n\n* Linux kernel built with the 802.1Q/802.1ad VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local Area Network(CONFIG_VXLAN) with Transparent Ethernet Bridging(TEB) GRO support, is vulnerable to a stack overflow issue. It could occur while receiving large packets via GRO path, as an unlimited recursion could unfold in both VLAN and TEB modules, leading to a stack corruption in the kernel. (CVE-2016-7039, Important)\n\nRed Hat would like to thank Phil Oester for reporting CVE-2016-5195.\n\nBug Fix(es):\n\n* Previously, the operating system did not support the Mellanox ConnectX-4 PCIe Network Interface Controllers (NIC) in Ethernet mode. This update enables Ethernet support in the mlx5 driver. As a result, the Mellanox ConnectX-4 PCIe NICs now work in Ethernet mode as expected. (BZ#1413108)\n\n* On the Qualcomm Datacenter Technologies server platform with Qualcomm Datacenter Technologies Centriq 2400 CPU (QDF2400v1) memory accesses sometimes allocated Translation Lookaside Buffer (TLB) entries using an incorrect Address Space ID (ASID). This could consequently result in memory corruption and crashes under certain conditions. The underlying source code has been modified to handle the TTBRx_EL1[ASID] and TTBRx_EL1[BADDR] fields separately using a reserved ASID, and the described problem no longer occurs. (BZ#1421765)",
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          "text": "kernel: mm: privilege escalation via MAP_PRIVATE COW breakage",
          "title": "Vulnerability summary"
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          "category": "other",
          "text": "This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG 2.x. This issue has been rated as having Important security impact. Updates for each affected version are in progress and will be released as soon as possible.\n\nShipping versions of Fedora are affected and Fedora is aware of this flaw.\n\nFor additional information about this flaw, please see https://access.redhat.com/security/vulnerabilities/2706661",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "title": "kernel: remotely triggerable unbounded recursion in the vlan gro code leading to a kernel crash"
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      "cwe": {
        "id": "CWE-674",
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          "text": "A flaw was found in the way the Linux kernel\u0027s networking subsystem handled offloaded packets with multiple layers of encapsulation in the GRO (Generic Receive Offload) code path. A remote attacker could use this flaw to trigger unbounded recursion in the kernel that could lead to stack corruption, resulting in a system crash.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: Remotely triggerable recursion in GRE code leading to kernel crash",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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      "title": "kernel: Remotely triggerable recursion in GRE code leading to kernel crash"
    }
  ]
}


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