rhsa-2015_1190
Vulnerability from csaf_redhat
Published
2015-06-25 13:46
Modified
2024-11-14 18:09
Summary
Red Hat Security Advisory: kernel security and bug fix update

Notes

Topic
Updated kernel packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 5.6 Long Life. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Details
The kernel packages contain the Linux kernel, the core of any Linux operating system. * It was found that the Linux kernel's implementation of vectored pipe read and write functionality did not take into account the I/O vectors that were already processed when retrying after a failed atomic access operation, potentially resulting in memory corruption due to an I/O vector array overrun. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2015-1805, Important) The security impact of this issue was discovered by Red Hat. This update also fixes the following bug: * Previously, the signal delivery paths did not clear the TS_USEDFPU flag, which could cause problems in the switch_to() function and lead to floating-point unit (FPU) corruption. With this update, TS_USEDFPU is cleared as expected, and FPU is no longer under threat of corruption. (BZ#1214237) All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.
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": "1202855"
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          "category": "description",
          "text": "It was found that the Linux kernel\u0027s implementation of vectored pipe read and write functionality did not take into account the I/O vectors that were already processed when retrying after a failed atomic access operation, potentially resulting in memory corruption due to an I/O vector array overrun. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: pipe: iovec overrun leading to memory corruption",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does affect the Linux kernel packages as shipped with Red Hat\nEnterprise Linux 5, 6, and 7, and Red Hat Enterprise MRG 2. Future Linux\nkernel updates for the respective releases will address this issue.",
          "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.",
          "title": "CVSS score applicability"
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2015-1805"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2015-1805",
          "url": "https://www.cve.org/CVERecord?id=CVE-2015-1805"
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          "category": "external",
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          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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          "details": "Important"
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      ],
      "title": "kernel: pipe: iovec overrun leading to memory corruption"
    }
  ]
}


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