Filtered by vendor Xen
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Total
446 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2022-42330 | 1 Xen | 1 Xen | 2023-02-06 | N/A | 7.5 HIGH |
| Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" (e.g. for performing a kexec) the libxl based Xen toolstack will normally perform a XS_RELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XS_RELEASE will have the same impact. | |||||
| CVE-2019-18422 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2023-02-03 | 8.5 HIGH | 8.8 HIGH |
| An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service or gain privileges by leveraging the erroneous enabling of interrupts. Interrupts are unconditionally unmasked in exception handlers. When an exception occurs on an ARM system which is handled without changing processor level, some interrupts are unconditionally enabled during exception entry. So exceptions which occur when interrupts are masked will effectively unmask the interrupts. A malicious guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified. | |||||
| CVE-2019-17349 | 2 Debian, Xen | 2 Debian Linux, Xen | 2023-02-03 | 4.9 MEDIUM | 5.5 MEDIUM |
| An issue was discovered in Xen through 4.12.x allowing Arm domU attackers to cause a denial of service (infinite loop) involving a LoadExcl or StoreExcl operation. | |||||
| CVE-2019-17342 | 2 Debian, Xen | 2 Debian Linux, Xen | 2023-02-03 | 4.4 MEDIUM | 7.0 HIGH |
| An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges by leveraging a race condition that arose when XENMEM_exchange was introduced. | |||||
| CVE-2019-17341 | 2 Debian, Xen | 2 Debian Linux, Xen | 2023-02-03 | 6.9 MEDIUM | 7.8 HIGH |
| An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges by leveraging a page-writability race condition during addition of a passed-through PCI device. | |||||
| CVE-2019-17350 | 2 Debian, Xen | 2 Debian Linux, Xen | 2023-02-03 | 4.9 MEDIUM | 5.5 MEDIUM |
| An issue was discovered in Xen through 4.12.x allowing Arm domU attackers to cause a denial of service (infinite loop) involving a compare-and-exchange operation. | |||||
| CVE-2019-17347 | 2 Debian, Xen | 2 Debian Linux, Xen | 2023-02-03 | 4.6 MEDIUM | 7.8 HIGH |
| An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with Linux (and possibly other guest kernels). | |||||
| CVE-2019-17348 | 2 Debian, Xen | 2 Debian Linux, Xen | 2023-02-03 | 4.9 MEDIUM | 6.5 MEDIUM |
| An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service because of an incompatibility between Process Context Identifiers (PCID) and shadow-pagetable switching. | |||||
| CVE-2019-17346 | 2 Debian, Xen | 2 Debian Linux, Xen | 2023-02-03 | 7.2 HIGH | 8.8 HIGH |
| An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges because of an incompatibility between Process Context Identifiers (PCID) and TLB flushes. | |||||
| CVE-2022-21127 | 3 Debian, Intel, Xen | 5 Debian Linux, Sgx Dcap, Sgx Psw and 2 more | 2023-01-31 | 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-2022-42327 | 2 Fedoraproject, Xen | 2 Fedora, Xen | 2023-01-19 | 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-2022-23960 | 3 Arm, Debian, Xen | 42 Cortex-a57, Cortex-a57 Firmware, Cortex-a65 and 39 more | 2023-01-19 | 1.9 LOW | 5.6 MEDIUM |
| Certain Arm Cortex and Neoverse processors through 2022-03-08 do not properly restrict cache speculation, aka Spectre-BHB. An attacker can leverage the shared branch history in the Branch History Buffer (BHB) to influence mispredicted branches. Then, cache allocation can allow the attacker to obtain sensitive information. | |||||
| CVE-2020-29569 | 4 Debian, Linux, Netapp and 1 more | 7 Debian Linux, Linux Kernel, Hci Compute Node and 4 more | 2023-01-19 | 7.2 HIGH | 8.8 HIGH |
| An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback. | |||||
| CVE-2022-33745 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2022-12-12 | N/A | 8.8 HIGH |
| 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. | |||||
| CVE-2022-42316 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2022-12-12 | 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-2022-42315 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2022-12-12 | 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 | 2022-12-12 | 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 | 2022-12-12 | 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-2022-33748 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2022-12-12 | N/A | 5.6 MEDIUM |
| lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU. | |||||
| CVE-2022-33747 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2022-12-09 | N/A | 3.8 LOW |
| Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings. | |||||