CVSS: 7.8EPSS: 0%CPEs: 24EXPL: 1CVE-2021-38300
https://notcve.org/view.php?id=CVE-2021-38300
arch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirable machine code when transforming unprivileged cBPF programs, allowing execution of arbitrary code within the kernel context. This occurs because conditional branches can exceed the 128 KB limit of the MIPS architecture. arch/mips/net/bpf_jit.c en el kernel de Linux anterior a la versión 5.4.10 puede generar código máquina no deseado al transformar programas cBPF sin privilegios, permitiendo la ejecución de código arbitrario dentro del contexto del kernel. Esto ocurre porque las ramas condicionales pueden superar el límite de 128 KB de la arquitectura MIPS • http://www.openwall.com/lists/oss-security/2021/09/15/5 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8b https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html https://security.netapp.com/advisory/ntap-20211008-0003 https://www.debian.org/security/2022/dsa-5096 •
CVSS: 8.8EPSS: 0%CPEs: 15EXPL: 1CVE-2021-3653 – kernel: SVM nested virtualization issue in KVM (AVIC support)
https://notcve.org/view.php?id=CVE-2021-3653
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7. • http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html https://bugzilla.redhat.com/show_bug.cgi?id=1983686 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://www.openwall.com/lists/oss-security/2021/08/16/1 https://access.redhat.com/security/cve/CVE-2021-3653 • CWE-862: Missing Authorization •
CVSS: 7.0EPSS: 0%CPEs: 31EXPL: 0CVE-2021-40490
https://notcve.org/view.php?id=CVE-2021-40490
A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in the Linux kernel through 5.13.13. Se ha detectado una condición de carrera en la función ext4_write_inline_data_end en el archivo fs/ext4/inline.c en el subsistema ext4 en el kernel de Linux versiones hasta 5.13.13 • https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=9e445093e523f3277081314c864f708fd4bd34aa https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M6VS2DLGT7TK7URKAS2KWJL3S533SGVA https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XJGX3DMJT6MRBW2XEF3TWVHYWZW3DG3N https://security.netapp.com/adv • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 4.9EPSS: 0%CPEs: 11EXPL: 0CVE-2021-3635 – kernel: flowtable list del corruption with kernel BUG at lib/list_debug.c:50
https://notcve.org/view.php?id=CVE-2021-3635
A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands. Se ha detectado un fallo en la implementación del netfilter del kernel de Linux en versiones anteriores a 5.5-rc7. Un usuario con acceso de root (CAP_SYS_ADMIN) es capaz de hacer entrar en pánico al sistema cuando emite comandos netfilter netflow. A flaw was found in the Linux kernel netfilter implementation. • https://bugzilla.redhat.com/show_bug.cgi?id=1976946 https://access.redhat.com/security/cve/CVE-2021-3635 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 1CVE-2021-38198
https://notcve.org/view.php?id=CVE-2021-38198
arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shadow page, leading to a missing guest protection page fault. El archivo arch/x86/kvm/mmu/paging_tmpl.h en el kernel de Linux versiones anteriores a 5.12.11, computa incorrectamente los permisos de acceso de una página sombra, conllevando a un fallo de página de protección de invitados • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11 https://github.com/torvalds/linux/commit/b1bd5cba3306691c771d558e94baa73e8b0b96b7 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html •