rhsa-2024_0262
Vulnerability from csaf_redhat
Published
2024-01-16 15:57
Modified
2024-11-06 04:43
Summary
Red Hat Security Advisory: kernel security update
Notes
Topic
An update for kernel is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support.
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 packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead (CVE-2023-3611)
* kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)
* kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128, CVE-2023-4206, CVE-2023-4207, CVE-2023-4208)
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.
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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"name": "Out-of-bounds Write"
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"text": "2225191"
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"category": "description",
"text": "An out-of-bounds memory write flaw was found in qfq_change_agg in net/sched/sch_qfq.c in the Traffic Control (QoS) subsystem in the Linux kernel. This flaw allows a local user to crash or potentially escalate their privileges on the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead",
"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-2023-3611"
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{
"category": "external",
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"category": "external",
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"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b5805fe0b8a46ba622a962880b5d64"
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"category": "vendor_fix",
"date": "2024-01-16T15:57:34+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.",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead"
},
{
"cve": "CVE-2023-3776",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2023-07-24T00:00:00+00:00",
"flags": [
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2225097"
}
],
"notes": [
{
"category": "description",
"text": "A use-after-free vulnerability was found in fw_set_parms in net/sched/cls_fw.c in network scheduler sub-component in the Linux Kernel. This issue occurs due to a missing sanity check during cleanup at the time of failure, leading to a misleading reference. This may allow a local attacker to gain local privilege escalation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function",
"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-2023-3776"
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"category": "external",
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"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f",
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"category": "vendor_fix",
"date": "2024-01-16T15:57:34+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.",
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{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function"
},
{
"cve": "CVE-2023-4128",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2023-07-24T00:00:00+00:00",
"flags": [
{
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2261965"
}
],
"notes": [
{
"category": "description",
"text": "This record is a duplicate of CVE-2023-4206, CVE-2023-4207, and CVE-2023-4208. Do not use this CVE record: CVE-2023-4128.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "All CVE users should reference CVE-2023-4206, CVE-2023-4207, CVE-2023-4208 instead of this record. All references and descriptions in this record have been removed to prevent accidental usage.",
"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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"title": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route"
},
{
"cve": "CVE-2023-4206",
"cwe": {
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{
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"title": "Vulnerability description"
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"category": "summary",
"text": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route",
"title": "Vulnerability summary"
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{
"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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"url": "https://lore.kernel.org/netdev/193d6cdf-d6c9-f9be-c36a-b2a7551d5fb6@mojatatu.com/"
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"category": "vendor_fix",
"date": "2024-01-16T15:57:34+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.",
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{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route"
},
{
"cve": "CVE-2023-4207",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2023-07-24T00:00:00+00:00",
"flags": [
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2225511"
}
],
"notes": [
{
"category": "description",
"text": "There are 3 CVEs for the use-after-free flaw found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the Linux Kernel: CVE-2023-4206, CVE-2023-4207, CVE-2023-4208. \r\nA local user could use any of these flaws to crash the system or potentially escalate their privileges on the system.\r\n\r\nSimilar CVE-2023-4128 was rejected as a duplicate.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route",
"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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"category": "external",
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"date": "2024-01-16T15:57:34+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.",
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{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route"
},
{
"cve": "CVE-2023-4208",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2023-07-24T00:00:00+00:00",
"flags": [
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2225511"
}
],
"notes": [
{
"category": "description",
"text": "There are 3 CVEs for the use-after-free flaw found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the Linux Kernel: CVE-2023-4206, CVE-2023-4207, CVE-2023-4208. \r\nA local user could use any of these flaws to crash the system or potentially escalate their privileges on the system.\r\n\r\nSimilar CVE-2023-4128 was rejected as a duplicate.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route",
"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-2023-4208"
},
{
"category": "external",
"summary": "RHBZ#2225511",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2225511"
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"url": "https://www.cve.org/CVERecord?id=CVE-2023-4208"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-4208",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4208"
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{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81",
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{
"category": "external",
"summary": "https://lore.kernel.org/netdev/193d6cdf-d6c9-f9be-c36a-b2a7551d5fb6@mojatatu.com/",
"url": "https://lore.kernel.org/netdev/193d6cdf-d6c9-f9be-c36a-b2a7551d5fb6@mojatatu.com/"
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"release_date": "2023-07-29T00:00:00+00:00",
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"category": "vendor_fix",
"date": "2024-01-16T15:57:34+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.",
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{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route"
},
{
"cve": "CVE-2023-31436",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2023-05-02T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2192671"
}
],
"notes": [
{
"category": "description",
"text": "An out-of-bounds memory access flaw was found in the Linux kernel\u2019s traffic control (QoS) subsystem in how a user triggers the qfq_change_class function with an incorrect MTU value of the network device used as lmax. This flaw allows a local user to crash or potentially escalate their privileges on the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: out-of-bounds write in qfq_change_class function",
"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-2023-31436"
},
{
"category": "external",
"summary": "RHBZ#2192671",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2192671"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-31436",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-31436"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-31436",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-31436"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3037933448f60f9acb705997eae62013ecb81e0d",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3037933448f60f9acb705997eae62013ecb81e0d"
}
],
"release_date": "2023-04-13T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2024-01-16T15:57:34+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.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2024:0262"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent the module, sch_qfq from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.",
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{
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"attackVector": "LOCAL",
"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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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: out-of-bounds write in qfq_change_class function"
}
]
}
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- 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.