rhsa-2025:4497
Vulnerability from csaf_redhat
Published
2025-05-06 00:56
Modified
2025-07-29 09:22
Summary
Red Hat Security Advisory: kpatch-patch-5_14_0-427_13_1, kpatch-patch-5_14_0-427_31_1, kpatch-patch-5_14_0-427_44_1, and kpatch-patch-5_14_0-427_55_1 security update
Notes
Topic
An update for kpatch-patch-5_14_0-427_13_1, kpatch-patch-5_14_0-427_31_1, kpatch-patch-5_14_0-427_44_1, and kpatch-patch-5_14_0-427_55_1 is now available for Red Hat Enterprise Linux 9.4 Extended 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
This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-5.14.0-427.13.1.el9_4.
Security Fix(es):
* kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() (CVE-2025-21927)
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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"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()\n\nnvme_tcp_recv_pdu() doesn\u0027t check the validity of the header length.\nWhen header digests are enabled, a target might send a packet with an\ninvalid header length (e.g. 255), causing nvme_tcp_verify_hdgst()\nto access memory outside the allocated area and cause memory corruptions\nby overwriting it with the calculated digest.\n\nFix this by rejecting packets with an unexpected header length.",
"title": "Vulnerability description"
},
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"text": "kernel: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()",
"title": "Vulnerability summary"
},
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"category": "other",
"text": "This flaw results from an improper bounds check, which an attacker could exploit by sending a packet with a too-large header. The driver processing that header will then both read beyond the bounds of the buffer it has allocated, and will also alter memory outside of the buffer when it writes the result of digest calculations. An attacker could thus read otherwise inaccessible kernel memory, causing a denial of service or exfiltrating sensitive data, or write out of bounds, which could lead to an escalation of privileges.\nWhile NVMe over fabric is typically used in the context of a single system, Red Hat\u0027s assessment suggests an Attack Vector of Adjacent. This is due to the possibility of NVMe being used as a storage solution for a cluster or datacenter.",
"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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"category": "external",
"summary": "RHBZ#2356593",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2356593"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-21927",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-21927"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-21927",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21927"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025040133-CVE-2025-21927-36d6@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025040133-CVE-2025-21927-36d6@gregkh/T"
}
],
"release_date": "2025-04-01T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-05-06T00:56:01+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": {
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},
"url": "https://access.redhat.com/errata/RHSA-2025:4497"
},
{
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"details": "To mitigate this issue, prevent the `nvme_tcp` module from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Note that this will make NVMe over TCP fabrics unavailable, and as such is not a suitable mitigation for systems relying on that technology.",
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"baseScore": 8.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/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: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()"
}
]
}
Loading…
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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.
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