CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2021-3732 – kernel: overlayfs: Mounting overlayfs inside an unprivileged user namespace can reveal files
https://notcve.org/view.php?id=CVE-2021-3732
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible. Se ha encontrado un fallo en el subsistema OverlayFS del kernel de Linux en la forma en que el usuario monta el sistema de archivos TmpFS con OverlayFS. Este fallo permite a un usuario local acceder a archivos ocultos que no deberían ser accesibles A flaw was found in the Linux kernel’s OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible. • https://bugzilla.redhat.com/show_bug.cgi?id=1995249 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 https://ubuntu.com/security/CVE-2021-3732 https://access.redhat.com/security/cve/CVE-2021-3732 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 4.7EPSS: 0%CPEs: 19EXPL: 1CVE-2021-3753 – kernel: a race out-of-bound read in vt
https://notcve.org/view.php?id=CVE-2021-3753
A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality. Se observó un problema de carrera en el la función vt_k_ioctl en el archivo drivers/tty/vt/vt_ioctl.c en el kernel de Linux, que puede causar una lectura fuera de límites en vt ya que el acceso de escritura a vc_mode no está protegido por el bloqueo de vt_ioctl (KDSETMDE). La mayor amenaza de esta vulnerabilidad es para la confidencialidad de los datos • https://bugzilla.redhat.com/show_bug.cgi?id=1999589 https://github.com/torvalds/linux/commit/2287a51ba822384834dafc1c798453375d1107c7 https://security.netapp.com/advisory/ntap-20221028-0003 https://www.openwall.com/lists/oss-security/2021/09/01/4 https://access.redhat.com/security/cve/CVE-2021-3753 • CWE-125: Out-of-bounds Read CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 7.1EPSS: 0%CPEs: 18EXPL: 1CVE-2021-3739
https://notcve.org/view.php?id=CVE-2021-3739
A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, where triggering the bug requires ‘CAP_SYS_ADMIN’. This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability. Se ha encontrado un fallo de desreferencia de puntero NULL en la función btrfs_rm_device en el archivo fs/btrfs/volumes.c en el Kernel de Linux, donde el desencadenamiento del bug requiere "CAP_SYS_ADMIN". Este fallo permite a un atacante local bloquear el sistema o filtrar información interna del kernel. • https://bugzilla.redhat.com/show_bug.cgi?id=1997958 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091 https://github.com/torvalds/linux/commit/e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091 https://security.netapp.com/advisory/ntap-20220407-0006 https://ubuntu.com/security/CVE-2021-3739 https://www.openwall.com/lists/oss-security/2021/08/25/3 • CWE-476: NULL Pointer Dereference •
CVSS: 4.9EPSS: 0%CPEs: 4EXPL: 0CVE-2021-20317 – kernel: timer tree corruption leads to missing wakeup and system freeze
https://notcve.org/view.php?id=CVE-2021-20317
A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP. Se ha encontrado un fallo en el kernel de Linux. Un árbol de temporizadores corrompido hacía que faltara el despertar de la tarea en la función timerqueue_add en el archivo lib/timerqueue.c. • https://bugzilla.redhat.com/show_bug.cgi?id=2005258 https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1 https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html https://www.debian.org/security/2022/dsa-5096 https://access.redhat.com/security/cve/CVE-2021-20317 • CWE-665: Improper Initialization •
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') •