Total
493 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2024-45818 | 1 Xen | 1 Xen | 2025-05-20 | N/A | 6.5 MEDIUM |
| The hypervisor contains code to accelerate VGA memory accesses for HVM guests, when the (virtual) VGA is in "standard" mode. Locking involved there has an unusual discipline, leaving a lock acquired past the return from the function that acquired it. This behavior results in a problem when emulating an instruction with two memory accesses, both of which touch VGA memory (plus some further constraints which aren't relevant here). When emulating the 2nd access, the lock that is already being held would be attempted to be re-acquired, resulting in a deadlock. This deadlock was already found when the code was first introduced, but was analysed incorrectly and the fix was incomplete. Analysis in light of the new finding cannot find a way to make the existing locking discipline work. In staging, this logic has all been removed because it was discovered to be accidentally disabled since Xen 4.7. Therefore, we are fixing the locking problem by backporting the removal of most of the feature. Note that even with the feature disabled, the lock would still be acquired for any accesses to the VGA MMIO region. | |||||
| CVE-2022-42315 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-06 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-42314 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-06 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-42313 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-06 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-42312 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-06 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-42311 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-06 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-42327 | 2 Fedoraproject, Xen | 2 Fedora, Xen | 2025-05-05 | N/A | 7.1 HIGH |
| x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests. | |||||
| CVE-2022-42317 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-05 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-42316 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-05 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-42318 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-05 | N/A | 6.5 MEDIUM |
| Xenstore: guests can let run xenstored out of memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service (DoS) of xenstored. There are multiple ways how guests can cause large memory allocations in xenstored: - - by issuing new requests to xenstored without reading the responses, causing the responses to be buffered in memory - - by causing large number of watch events to be generated via setting up multiple xenstore watches and then e.g. deleting many xenstore nodes below the watched path - - by creating as many nodes as allowed with the maximum allowed size and path length in as many transactions as possible - - by accessing many nodes inside a transaction | |||||
| CVE-2022-21166 | 5 Debian, Fedoraproject, Intel and 2 more | 7 Debian Linux, Fedora, Sgx Dcap and 4 more | 2025-05-05 | 2.1 LOW | 5.5 MEDIUM |
| Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. | |||||
| CVE-2022-21127 | 3 Debian, Intel, Xen | 5 Debian Linux, Sgx Dcap, Sgx Psw and 2 more | 2025-05-05 | 2.1 LOW | 5.5 MEDIUM |
| Incomplete cleanup in specific special register read operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. | |||||
| CVE-2022-21125 | 5 Debian, Fedoraproject, Intel and 2 more | 7 Debian Linux, Fedora, Sgx Dcap and 4 more | 2025-05-05 | 2.1 LOW | 5.5 MEDIUM |
| Incomplete cleanup of microarchitectural fill buffers on some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. | |||||
| CVE-2022-21123 | 5 Debian, Fedoraproject, Intel and 2 more | 7 Debian Linux, Fedora, Sgx Dcap and 4 more | 2025-05-05 | 2.1 LOW | 5.5 MEDIUM |
| Incomplete cleanup of multi-core shared buffers for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. | |||||
| CVE-2022-42326 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2025-05-05 | N/A | 5.5 MEDIUM |
| Xenstore: Guests can create arbitrary number of nodes via transactions T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] In case a node has been created in a transaction and it is later deleted in the same transaction, the transaction will be terminated with an error. As this error is encountered only when handling the deleted node at transaction finalization, the transaction will have been performed partially and without updating the accounting information. This will enable a malicious guest to create arbitrary number of nodes. | |||||
| CVE-2023-20593 | 3 Amd, Debian, Xen | 140 Athlon Gold 7220u, Athlon Gold 7220u Firmware, Epyc 7232p and 137 more | 2025-02-13 | N/A | 5.5 MEDIUM |
| An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information. | |||||
| CVE-2022-42336 | 1 Xen | 1 Xen | 2025-01-22 | N/A | 3.3 LOW |
| Mishandling of guest SSBD selection on AMD hardware The current logic to set SSBD on AMD Family 17h and Hygon Family 18h processors requires that the setting of SSBD is coordinated at a core level, as the setting is shared between threads. Logic was introduced to keep track of how many threads require SSBD active in order to coordinate it, such logic relies on using a per-core counter of threads that have SSBD active. When running on the mentioned hardware, it's possible for a guest to under or overflow the thread counter, because each write to VIRT_SPEC_CTRL.SSBD by the guest gets propagated to the helper that does the per-core active accounting. Underflowing the counter causes the value to get saturated, and thus attempts for guests running on the same core to set SSBD won't have effect because the hypervisor assumes it's already active. | |||||
| CVE-2023-4949 | 2 Gnu, Xen | 2 Grub, Xen | 2024-11-21 | N/A | 8.1 HIGH |
| An attacker with local access to a system (either through a disk or external drive) can present a modified XFS partition to grub-legacy in such a way to exploit a memory corruption in grub’s XFS file system implementation. | |||||
| CVE-2023-20588 | 5 Amd, Debian, Fedoraproject and 2 more | 78 Athlon Gold 3150g, Athlon Gold 3150g Firmware, Athlon Gold 3150ge and 75 more | 2024-11-21 | N/A | 5.5 MEDIUM |
| A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality. | |||||
| CVE-2022-42335 | 2 Fedoraproject, Xen | 2 Fedora, Xen | 2024-11-21 | N/A | 7.8 HIGH |
| x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control. | |||||