suse-su-2022:2557-1
Vulnerability from csaf_suse
Published
2022-07-27 08:01
Modified
2022-07-27 08:01
Summary
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:
- CVE-2022-21123, CVE-2022-21125, CVE-2022-21166: Fixed MMIO stale data vulnerabilities on x86 (XSA-404) (bsc#1200549).
- CVE-2022-33745: Fixed insufficient TLB flush for x86 PV guests in shadow mode (XSA-408) (bsc#1201394).
- CVE-2022-23816, CVE-2022-23825, CVE-2022-29900: Fixed RETBLEED vulnerability, arbitrary speculative code execution with return instructions (XSA-407) (bsc#1201469).
Patchnames
SUSE-2022-2557,SUSE-SLE-SDK-12-SP5-2022-2557,SUSE-SLE-SERVER-12-SP5-2022-2557
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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},
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"text": "Mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions.",
"title": "CVE description"
}
],
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"text": "insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.",
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]
}
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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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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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