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        "text": "An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.\n\nRed 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.",
        "title": "Topic"
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        "text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: ipv6: fix possible UAF in icmpv6_rcv() (CVE-2026-53006)\n\n* kernel: ipv4: free net-\u003eipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002)\n\n* kernel: can:bcm: arbitrary kernel code execution leading to escalate privileges (CVE-2026-17523)\n\n* kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res-\u003ert6 pointer (CVE-2026-74581)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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        "name": "Expired Pointer Dereference"
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          "text": "2507407"
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          "category": "description",
          "text": "A flaw was found in the Linux kernel in net/can/bcm.c in can: bcm, where an unprivileged local user can exploit this vulnerability to execute arbitrary code within the kernel, which leads to a local privilege escalation (LPE). This allows the attacker to gain root privileges and take full control of the affected system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: can:bcm: arbitrary kernel code execution leading to escalate privileges",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important flaw in the Linux kernel\u0027s CAN BCM module that allows a local unprivileged attacker to achieve root privileges through arbitrary kernel code execution. The vulnerability is present in Red Hat Enterprise Linux 8, where a proof of concept has demonstrated local privilege escalation, even without unprivileged user namespaces or the `kernel-modules-extra` package.",
          "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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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "kernel: can:bcm: arbitrary kernel code execution leading to escalate privileges"
    },
    {
      "cve": "CVE-2026-53006",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
      },
      "discovery_date": "2026-06-24T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2492363"
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      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IPv6 (Internet Protocol version 6) implementation. This vulnerability, a Use-After-Free (UAF) error, occurs due to incorrect caching of network packet addresses before a memory operation. An attacker could potentially exploit this flaw to cause memory corruption, which may lead to a denial of service or, in some scenarios, arbitrary code execution.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipv6: fix possible UAF in icmpv6_rcv()",
          "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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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-53006"
        },
        {
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-53006",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-53006"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-53006",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53006"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026062448-CVE-2026-53006-2b02@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026062448-CVE-2026-53006-2b02@gregkh/T"
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      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-01T09:35:58+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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        {
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            "availabilityImpact": "HIGH",
            "baseScore": 7.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: ipv6: fix possible UAF in icmpv6_rcv()"
    },
    {
      "cve": "CVE-2026-64002",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
      },
      "discovery_date": "2026-07-19T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2502363"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IPv4 networking component. The `ipv4_sysctl_exit_net()` function prematurely frees the `net-\u003eipv4.sysctl_local_reserved_ports` memory. This can lead to a use-after-free vulnerability, where other threads might attempt to access deallocated memory. Such an issue can result in system instability or a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ipv4: free net-\u003eipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()",
          "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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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-64002"
        },
        {
          "category": "external",
          "summary": "RHBZ#2502363",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502363"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-64002",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-64002"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-64002",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64002"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026071907-CVE-2026-64002-b8fe@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026071907-CVE-2026-64002-b8fe@gregkh/T"
        }
      ],
      "release_date": "2026-07-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-01T09:35:58+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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        {
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            "baseScore": 7.0,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: ipv4: free net-\u003eipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()"
    },
    {
      "cve": "CVE-2026-74581",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "discovery_date": "2026-08-21T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2520980"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A use-after-free vulnerability was found in the Linux kernel\u0027s IPv6 FIB rule lookup path. In fib6_rule_suppress(), when a route is suppressed and released via ip6_rt_put_flags(), the res-\u003ert6 pointer is not cleared. If no later rule supplies a replacement route, fib6_rule_lookup() returns the stale (freed) rt6_info to its caller. The subsequent dst_release() then operates on freed memory, hitting rcuref_put_slowpath(). A local attacker who can configure IPv6 routing/FIB rules could trigger this to cause a denial of service (kernel crash) or potentially escalate privileges.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res-\u003ert6 pointer",
          "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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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-74581"
        },
        {
          "category": "external",
          "summary": "RHBZ#2520980",
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-74581"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-74581",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74581"
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        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6aea62e433fe1b586202a5fee8b5807ce635e1d7",
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6aea62e433fe1b586202a5fee8b5807ce635e1d7"
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        {
          "category": "vendor_fix",
          "date": "2026-09-01T09:35:58+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.\n\nRed Hat recommends treating all kernel errata as security-relevant. Given the kernel\u0027s fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers\u0027 overall security posture.\n\nBecause of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat\u0027s CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.",
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            "category": "machine"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:61932"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, disable the `ipv6` kernel module at boot using the kernel command-line parameter:\n\n```\ngrubby --update-kernel=ALL --args=\"ipv6.disable=1\"\n```\n\nA reboot is required for this change to take effect. To verify after reboot:\n\n```\ncat /proc/cmdline | grep -o ipv6.disable=1\nsysctl net.ipv6.conf.all.disable_ipv6\n```\n\nApplications or services that rely on the IPv6 protocol cannot use this mitigation and should prioritize applying the fix.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res-\u003ert6 pointer"
    }
  ]
}