SUSE-SU-2026:0012-1
Vulnerability from csaf_suse - Published: 2026-01-05 10:31 - Updated: 2026-01-05 10:31Summary
Security update for xen
Notes
Title of the patch
Security update for xen
Description of the patch
This update for xen fixes the following issues:
Security issues fixed:
- CVE-2025-27466: NULL pointer dereference in the Viridian interface when updating the reference TSC area (bsc#1248807).
- CVE-2025-58142: NULL pointer dereference in the Viridian interface due to assumption that the SIM page is mapped when
a synthetic timer message has to be delivered (bsc#1248807).
- CVE-2025-58143: information leak and reference counter underflow in the Viridian interface due to race in the mapping
of the reference TSC page (bsc#1248807).
- CVE-2025-58147: incorrect input sanitisation in Viridian hypercalls using the HV_VP_SET Sparse format can lead to
out-of-bounds write through `vpmask_set()` (bsc#1251271).
- CVE-2025-58148: incorrect input sanitisation in Viridian hypercalls using any input format can lead to out-of-bounds
read through `send_ipi()` (bsc#1251271).
- CVE-2025-58149: incorrect removal of permissions on PCI device unplug allows PV guests to access memory of devices no
longer assigned to them (bsc#1252692).
Other issues fixed:
- Several upstream bug fixes (bsc#1027519).
- Failure to restart xenstored (bsc#1254180).
Patchnames
SUSE-2026-12,SUSE-SLE-Module-Basesystem-15-SP6-2026-12,SUSE-SLE-Module-Server-Applications-15-SP6-2026-12,SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-12,SUSE-SLE-Product-SLES_SAP-15-SP6-2026-12,openSUSE-SLE-15.6-2026-12
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
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"text": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nThere are multiple issues related to the handling and accessing of guest\nmemory pages in the viridian code:\n\n 1. A NULL pointer dereference in the updating of the reference TSC area.\n This is CVE-2025-27466.\n\n 2. A NULL pointer dereference by assuming the SIM page is mapped when\n a synthetic timer message has to be delivered. This is\n CVE-2025-58142.\n\n 3. A race in the mapping of the reference TSC page, where a guest can\n get Xen to free a page while still present in the guest physical to\n machine (p2m) page tables. This is CVE-2025-58143.",
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"date": "2026-01-05T10:31:27Z",
"details": "moderate"
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"notes": [
{
"category": "general",
"text": "When passing through PCI devices, the detach logic in libxl won\u0027t remove\naccess permissions to any 64bit memory BARs the device might have. As a\nresult a domain can still have access any 64bit memory BAR when such\ndevice is no longer assigned to the domain.\n\nFor PV domains the permission leak allows the domain itself to map the memory\nin the page-tables. For HVM it would require a compromised device model or\nstubdomain to map the leaked memory into the HVM domain p2m.",
"title": "CVE description"
}
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"openSUSE Leap 15.6:xen-tools-xendomains-wait-disk-4.18.5_08-150600.3.34.2.noarch"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-01-05T10:31:27Z",
"details": "moderate"
}
],
"title": "CVE-2025-58149"
}
]
}
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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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