RHSA-2026:1148
Vulnerability from csaf_redhat - Published: 2026-01-26 07:50 - Updated: 2026-03-18 03:16Summary
Red Hat Security Advisory: kernel-rt security update
Notes
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.
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: Bluetooth: hci_event: call disconnect callback before deleting conn (CVE-2023-53673)
* kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)
* kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)
* kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)
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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{
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{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE\n\nThis data originates from userspace and is used in buffer offset\ncalculations which could potentially overflow causing an out-of-bounds\naccess.",
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},
{
"category": "summary",
"text": "kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A local attacker with access to the vmwgfx device could trigger an integer overflow when sending crafted SVGA3D command buffers with a malformed header size. The unchecked header-\u003esize field is used in buffer offset arithmetic, leading to potential out-of-bounds memory access in the kernel. The patch enforces a maximum bound (SVGA_CMD_MAX_DATASIZE) to prevent overflows. This issue may allow denial of service or privilege escalation within the guest VM.",
"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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{
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{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-40277",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40277"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025120717-CVE-2025-40277-d511@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025120717-CVE-2025-40277-d511@gregkh/T"
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{
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"date": "2026-01-26T07:50:32+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",
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"title": "kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE"
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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