rhsa-2023_4378
Vulnerability from csaf_redhat
Published
2023-08-01 09:08
Modified
2024-11-15 17:25
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update
Notes
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 9.
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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: ipvlan: out-of-bounds write caused by unclear skb->cb (CVE-2023-3090)
* kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt() (CVE-2023-35788)
* kernel: KVM: x86/mmu: race condition in direct_page_fault() (CVE-2022-45869)
* kernel: speculative pointer dereference in do_prlimit() in kernel/sys.c (CVE-2023-0458)
* kernel: Spectre v2 SMT mitigations problem (CVE-2023-1998)
For 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.
Bug Fix(es):
* RHEL9 rt: blktests block/024 failed (BZ#2209920)
* Backport pinned timers RT specific behavior for FIFO tasks (BZ#2210071)
* kernel-rt: update RT source tree to the RHEL-9.2z2 source tree (BZ#2215122)
* kernel-rt: update RT source tree to the RHEL-9.2z2b source tree (BZ#2222796)
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": "A flaw was found in the Linux kernel in the KVM. A race condition in direct_page_fault allows guest OS users to cause a denial of service (host OS crash or host OS memory corruption) when nested virtualization and the TDP MMU are enabled.",
"title": "Vulnerability description"
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"text": "kernel: KVM: x86/mmu: race condition in direct_page_fault()",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "The nested virtualization feature is not enabled by default up to Red Hat Enterprise Linux 8.4. Most importantly, Red Hat currently provides nested virtualization only as a Technology Preview and is therefore unsupported for production use. For additional details, please see https://access.redhat.com/solutions/21101 and https://access.redhat.com/support/offerings/techpreview.",
"title": "Statement"
},
{
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"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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},
{
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{
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},
{
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"summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-45869",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-45869"
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{
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"ids": [
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{
"category": "description",
"text": "A vulnerabilty was found in Linux Kernel, where a speculative pointer dereference problem exists in the Linux Kernel on the do_prlimit() function. The resource argument value is controlled and is used in pointer arithmetic for the \u0027rlim\u0027 variable and can be used to leak the contents.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: speculative pointer dereference in do_prlimit() in kernel/sys.c",
"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",
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"url": "https://access.redhat.com/security/cve/CVE-2023-0458"
},
{
"category": "external",
"summary": "RHBZ#2193219",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2193219"
},
{
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"summary": "https://www.cve.org/CVERecord?id=CVE-2023-0458",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-0458"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-0458",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0458"
},
{
"category": "external",
"summary": "https://github.com/torvalds/linux/commit/739790605705ddcf18f21782b9c99ad7d53a8c11",
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{
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"text": "A flaw was found in the IPVLAN network driver in the Linux kernel. This issue is caused by missing skb-\u003ecb initialization in `__ip_options_echo` and can lead to an out-of-bounds write stack overflow. This may allow a local user to cause a denial of service or potentially achieve local privilege escalation.",
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{
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"text": "kernel: ipvlan: out-of-bounds write caused by unclear skb-\u003ecb",
"title": "Vulnerability summary"
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{
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"text": "Red Hat Enterprise Linux 6 and 7 are not affected by this flaw as they did not include IPVLAN support.",
"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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{
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"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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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.