CVSS: 8.2EPSS: 0%CPEs: 1EXPL: 1CVE-2019-19770 – kernel: use-after-free in debugfs_remove in fs/debugfs/inode.c
https://notcve.org/view.php?id=CVE-2019-19770
In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace ** EN DISPUTA ** En el kernel de Linux versión 4.19.83, presenta un uso de la memoria previamente liberada en la función debugfs_remove en el archivo fs/debugfs/inode.c (que se usa para eliminar un archivo o directorio en debugfs que se creó previamente con una llamada a otra función debugfs como debugfs_create_file). NOTA: Los desarrolladores del kernel de Linux disputan este problema como no un problema con debugfs, sino que es un problema con el mal uso de debugfs dentro de blktrace. A use-after-free flaw was found in the debugfs_remove function in the Linux kernel. The flaw could allow a local attacker with special user (or root) privilege to crash the system at the time of file or directory removal. • http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html https://bugzilla.kernel.org/show_bug.cgi?id=205713 https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html https://lore.kernel.org/linux-block/20200402000002.7442-1-mcgrof%40kernel.org https://security.netapp.com/advisory/ntap-20200103-0001 https://access.redhat.com/security/cve/CVE-2019-19770 https://bugzilla.redhat.com/show_bug.cgi?id=1786179 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 35EXPL: 1CVE-2019-19448
https://notcve.org/view.php?id=CVE-2019-19448
In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure. En el kernel de Linux versiones 5.0.21 y 5.3.11, montando una imagen de sistema de archivos btrfs diseñada, al realizar algunas operaciones y luego haciendo una llamada de sistema syncfs puede conllevar a un uso de la memoria previamente liberada en la función try_merge_free_space en el archivo fs/btrfs/free-space-cache.c porque el puntero en una estructura de datos izquierda puede ser el mismo que el puntero en una estructura de datos derecha. • https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448 https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html https://security.netapp.com/advisory/ntap-20200103-0001 https://usn.ubuntu.com/4578-1 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 13EXPL: 1CVE-2019-19447 – kernel: mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c
https://notcve.org/view.php?id=CVE-2019-19447
In the Linux kernel 5.0.21, mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c, related to dump_orphan_list in fs/ext4/super.c. En el kernel de Linux versión 5.0.21, montando una imagen de sistema de archivos ext4 diseñada, al realizar algunas operaciones y desmontarla puede conllevar a un uso de la memoria previamente liberada en la función ext4_put_super en el archivo fs/ext4/super.c, relacionado con la función dump_orphan_list en el archivo fs/ext4/super.do. A flaw was found in the Linux kernel's ext4_unlink function. An attacker could corrupt memory or escalate privileges when deleting a file from a recently unmounted specially crafted ext4 filesystem, including local, USB, and iSCSI. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19447 https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html https://security.netapp.com/advisory/ntap-20200103-0001 https://access.redhat.com/security/cve/CVE-2019-19447 https://bugzilla.redhat.com/show_bug.cgi • CWE-416: Use After Free •
CVSS: 6.1EPSS: 0%CPEs: 3EXPL: 2CVE-2019-19602 – kernel: cached use of fpu_fpregs_owner_ctx in arch/x86/include/asm/fpu/internal.h can lead to DoS
https://notcve.org/view.php?id=CVE-2019-19602
fpregs_state_valid in arch/x86/include/asm/fpu/internal.h in the Linux kernel before 5.4.2, when GCC 9 is used, allows context-dependent attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact because of incorrect fpu_fpregs_owner_ctx caching, as demonstrated by mishandling of signal-based non-cooperative preemption in Go 1.14 prereleases on amd64, aka CID-59c4bd853abc. La función fpregs_state_valid en el archivo arch/x86/include/asm/fpu/internal.h en el kernel de Linux versiones anteriores a 5.4.2, cuando es usado GCC versión 9, permite a atacantes dependiendo del contexto causar una denegación de servicio (corrupción de memoria) o posiblemente tener otros impactos no especificados debido a un almacenamiento en caché incorrecto de fpu_fpregs_owner_ctx, como es demostrado por el manejo inapropiado de la preferencia no cooperativa basada en señal en Go versiones 1.14 preliminares a amd64, también se conoce como CID-59c4 anywhere53abc. A flaw was found in the Linux kernel. When compiled with GCC 9, a vector register corruption occurs on return from a signal handler where the top page of the signal stack had not yet been paged in which can allow a local attacker with special user privilege (or root) to leak kernel internal information. The highest threat from this vulnerability is to data confidentiality. • https://bugzilla.kernel.org/show_bug.cgi?id=205663 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=59c4bd853abcea95eccc167a7d7fd5f1a5f47b98 https://github.com/golang/go/issues/35777#issuecomment-561935388 https://github.com/torvalds/linux/commit/59c4bd853abcea95eccc167a7d7fd5f1a5f47b98 https://security.netapp.com/advisory/ntap-20200103-0001 https://usn.ubuntu.com/4284-1 https://access.redhat.com/security/cve/ • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-672: Operation on a Resource after Expiration or Release •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2019-19543 – kernel: use-after-free in serial_ir_init_module() in drivers/media/rc/serial_ir.c
https://notcve.org/view.php?id=CVE-2019-19543
In the Linux kernel before 5.1.6, there is a use-after-free in serial_ir_init_module() in drivers/media/rc/serial_ir.c. En el kernel de Linux versiones anteriores a 5.1.6, se presenta un uso de la memoria previamente liberada en la función serial_ir_init_module() en el archivo drivers/media/rc/serial_ir.c. A flaw was found in the Linux kernel’s infrared serial module. An attacker could use this flaw to corrupt memory and possibly escalate privileges. • http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.6 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=56cd26b618855c9af48c8301aa6754ced8dd0beb https://security.netapp.com/advisory/ntap-20200924-0005 https://access.redhat.com/security/cve/CVE-2019-19543 https://bugzilla.redhat.com/show_bug.cgi?id=1781810 • CWE-416: Use After Free •