{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 9.\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" }, { "category": "general", "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: watch queue race condition can lead to privilege escalation (CVE-2022-2959)\n\n* kernel: memory corruption in AX88179_178A based USB ethernet device. (CVE-2022-2964)\n\n* kernel: i915: Incorrect GPU TLB flush can lead to random memory access (CVE-2022-4139)\n\n* kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945)\n\n* kernel: i2c: unbounded length leads to buffer overflow in ismt_access() (CVE-2022-3077)\n\n* kernel: Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP option (CVE-2022-30594)\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.\n\nBug Fix(es):\n\n* DELL EMC: System is not booting into RT Kernel with perc12 [kernel-rt] (BZ#2139863)\n\n* kernel-rt: update RT source tree to the latest RHEL-9.1.z1 Batch (BZ#2141817)", "title": "Details" }, { "category": "legal_disclaimer", "text": "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.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2023:0300", "url": "https://access.redhat.com/errata/RHSA-2023:0300" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "2067482", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2067482" }, { "category": "external", "summary": "2085300", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2085300" }, { "category": "external", "summary": "2103681", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2103681" }, { "category": "external", "summary": "2123309", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2123309" }, { "category": "external", "summary": "2141752", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2141752" }, { "category": "external", "summary": "2147572", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2147572" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_0300.json" } ], "title": "Red Hat Security Advisory: kernel-rt security and bug fix update", "tracking": { "current_release_date": "2026-06-28T12:38:06+00:00", "generator": { "date": "2026-06-28T12:38:06+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.2.6" } }, "id": "RHSA-2023:0300", "initial_release_date": "2023-01-23T15:23:35+00:00", "revision_history": [ { "date": "2023-01-23T15:23:35+00:00", "number": "1", "summary": "Initial version" }, { "date": "2023-01-23T15:23:35+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-06-28T12:38:06+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux Real Time for NFV (v. 9)", "product": { "name": "Red Hat Enterprise Linux Real Time for NFV (v. 9)", "product_id": "NFV-9.1.0.Z.MAIN", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:9::nfv" } } }, { "category": "product_name", "name": "Red Hat Enterprise Linux Real Time (v. 9)", "product": { "name": "Red Hat Enterprise Linux Real Time (v. 9)", "product_id": "RT-9.1.0.Z.MAIN", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:9::realtime" } } } ], "category": "product_family", "name": 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"discovery_date": "2022-05-26T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2103681" } ], "notes": [ { "category": "description", "text": "A race condition was found in the Linux kernel's watch queue due to a missing lock in the pipe_resize_ring(). The race condition occurs when a thread uses ioctl(IOC_WATCH_QUEUE_SET_SIZE) to resize the pipe buffer and free the old pipe buffer, while another thread uses keyctl() to trigger a notification in the watch queue, calling post_one_notification() and accessing the freed pipe buffer. This flaw allows a local user to crash the system or escalate their privileges on the system.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: watch queue race condition can lead to privilege escalation", "title": "Vulnerability summary" }, { "category": "other", "text": "Red Hat Enterprise Linux 6, 7 and 8 are not affected by this issue as they did not include support for general notification queue.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.src", "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", "NFV-9.1.0.Z.MAIN:kernel-rt-core-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", 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In particular, the userspace controllable \"data->block[0]\" variable was not capped to a number between 0-255 and then used as the size of a memcpy, thus possibly writing beyond the end of dma_buffer. This flaw could allow a privileged local user to crash the system.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: i2c: unbounded length leads to buffer overflow in ismt_access()", "title": "Vulnerability summary" }, { "category": "other", "text": "Red Hat Enterprise Linux 6, 7 and 8 are not affected by this issue as they did not include support for I2C_SMBUS_BLOCK_PROC_CALL (upstream commit 5e9a97b).", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.src", "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", "NFV-9.1.0.Z.MAIN:kernel-rt-core-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", 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incorrect TLB flush issue was found in the Linux kernel’s GPU i915 kernel driver, potentially leading to random memory corruption or data leaks. This flaw could allow a local user to crash the system or escalate their privileges on the system.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: i915: Incorrect GPU TLB flush can lead to random memory access", "title": "Vulnerability summary" }, { "category": "other", "text": "Red Hat Enterprise Linux 7 is not affected by this flaw as it did not include support for Intel Gen12 GPU.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.src", "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", "NFV-9.1.0.Z.MAIN:kernel-rt-core-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", 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Bugzilla ID", "text": "2085300" } ], "notes": [ { "category": "description", "text": "A flaw was found in the Linux kernel. The PTRACE_SEIZE code path allows attackers to bypass intended restrictions on setting the PT_SUSPEND_SECCOMP flag, possibly disabling seccomp.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP option", "title": "Vulnerability summary" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.src", "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", "NFV-9.1.0.Z.MAIN:kernel-rt-core-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", "NFV-9.1.0.Z.MAIN:kernel-rt-debug-0:5.14.0-162.12.1.rt21.175.el9_1.x86_64", 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Resources Without Limits or Throttling" }, "discovery_date": "2022-11-10T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2141752" } ], "notes": [ { "category": "description", "text": "A buffer overflow flaw was found in the Linux kernel nfsd (network file system) subsystem. The way a user sends RPC over TCP with excess data added at the end of the message could allow a remote user to starve the resources, causing a denial of service.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: nfsd buffer overflow by RPC message over TCP with garbage data", "title": "Vulnerability summary" }, { "category": "other", "text": "Affected versions of the Red Hat Enterprise Linux are 8.7 and higher, because starting from the 8.7 the affected source code introduced with the errata RHSA-2022:7683.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "NFV-9.1.0.Z.MAIN:kernel-rt-0:5.14.0-162.12.1.rt21.175.el9_1.src", 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