CVSS: 7.8EPSS: 0%CPEs: 26EXPL: 0CVE-2021-29154 – kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation
https://notcve.org/view.php?id=CVE-2021-29154
BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. Los compiladores BPF JIT en el kernel de Linux hasta la versión 5.11.12 tienen un cálculo incorrecto de los desplazamientos de rama, lo que les permite ejecutar código arbitrario dentro del contexto del kernel. Esto afecta a arch/x86/net/bpf_jit_comp.c y arch/x86/net/bpf_jit_comp32.c A flaw was found in the Linux kernels eBPF implementation. By default, accessing the eBPF verifier is only accessible to privileged users with CAP_SYS_ADMIN. • http://packetstormsecurity.com/files/162434/Kernel-Live-Patch-Security-Notice-LSN-0076-1.html https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=26f55a59dc65ff77cd1c4b37991e26497fc68049 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e4d4d456436bfb2fe412ee2cd489f7658449b098 https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html https://lists.fedoraproject.org/archives/list/package-anno • CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2020-36310
https://notcve.org/view.php?id=CVE-2020-36310
An issue was discovered in the Linux kernel before 5.8. arch/x86/kvm/svm/svm.c allows a set_memory_region_test infinite loop for certain nested page faults, aka CID-e72436bc3a52. Se detectó un problema en el kernel de Linux versiones anteriores a 5.8. El archivo arch/x86/kvm/svm/svm.c permite un bucle infinito en la función set_memory_region_test para determinados fallos de página anidadas, también se conoce como CID-e72436bc3a52 • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e72436bc3a5206f95bb384e741154166ddb3202e https://www.debian.org/security/2022/dsa-5095 • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-30178
https://notcve.org/view.php?id=CVE-2021-30178
An issue was discovered in the Linux kernel through 5.11.11. synic_get in arch/x86/kvm/hyperv.c has a NULL pointer dereference for certain accesses to the SynIC Hyper-V context, aka CID-919f4ebc5987. Se detectó un problema en el kernel de Linux versiones hasta 5.11.11. La función synic_get en el archivo arch/x86/kvm/hyperv.c presenta una desreferencia de puntero NULL para determinados accesos en el contexto SynIC Hyper-V, también se conoce como CID-919f4ebc5987 • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=919f4ebc598701670e80e31573a58f1f2d2bf918 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJ5GEETMX3ERQ4DF3GSS2XPNSOOK44OB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TGQDVYCDM3F5VXUZIADIV2ERL3AJXNJS https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5YFGIIF24475A2LNW3UWHW2SNCS3G7M • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2020-36311
https://notcve.org/view.php?id=CVE-2020-36311
An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184. Se detectó un problema en el kernel de Linux versiones anteriores a 5.9. El archivo arch/x86/kvm/svm/sev.c permite a atacantes causar una denegación de servicio (bloqueo suave) al desencadenar la destrucción de una SEV VM grande (que requiere anular el registro de muchas regiones cifradas), también se conoce como CID-7be74942f184 • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7be74942f184fdfba34ddd19a0d995deb34d4a03 https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html https://www.debian.org/security/2021/dsa-4941 •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2020-36312 – kernel: memory leak upon a kmalloc failure in kvm_io_bus_unregister_dev function in virt/kvm/kvm_main.c
https://notcve.org/view.php?id=CVE-2020-36312
An issue was discovered in the Linux kernel before 5.8.10. virt/kvm/kvm_main.c has a kvm_io_bus_unregister_dev memory leak upon a kmalloc failure, aka CID-f65886606c2d. Se detectó un problema en el kernel de Linux versiones anteriores a 5.8.10. El archivo virt/kvm/kvm_main.c presenta una filtración de la memoria en la función kvm_io_bus_unregister_dev tras un fallo de kmalloc, también se conoce como CID-f65886606c2d A flaw was found in the KVM hypervisor of the Linux kernel. A memory leak could occur in kvm_io_bus_unregister_dev() upon a kmalloc failure. The highest threat from this vulnerability is to system availability. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.10 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f65886606c2d3b562716de030706dfe1bea4ed5e https://access.redhat.com/security/cve/CVE-2020-36312 https://bugzilla.redhat.com/show_bug.cgi?id=1947991 • CWE-401: Missing Release of Memory after Effective Lifetime CWE-772: Missing Release of Resource after Effective Lifetime •