CVSS: 7.8EPSS: 0%CPEs: 26EXPL: 2CVE-2020-25669
https://notcve.org/view.php?id=CVE-2020-25669
28 Jan 2021 — A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free. Se encontró una vulnerabilidad en el Kernel de Linux donde la función sunkbd_reinit habiendo sido programada por la función sunkbd_interrupt antes de que sunkbd fuera liberada. Aunque el puntero colgante está establecido en NULL ... • http://www.openwall.com/lists/oss-security/2020/11/05/2 • CWE-416: Use After Free •
CVSS: 4.9EPSS: 0%CPEs: 2EXPL: 0CVE-2020-35513 – kernel: Nfsd failure to clear umask after processing an open or create
https://notcve.org/view.php?id=CVE-2020-35513
25 Jan 2021 — A flaw incorrect umask during file or directory modification in the Linux kernel NFS (network file system) functionality was found in the way user create and delete object using NFSv4.2 or newer if both simultaneously accessing the NFS by the other process that is not using new NFSv4.2. A user with access to the NFS could use this flaw to starve the resources causing denial of service. Se encontró un fallo sin máscara incorrecto durante la modificación de archivos o directorios en la funcionalidad Linux ker... • https://bugzilla.redhat.com/show_bug.cgi?id=1911309 • CWE-271: Privilege Dropping / Lowering Errors •
CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 0CVE-2021-3178
https://notcve.org/view.php?id=CVE-2021-3178
19 Jan 2021 — fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior ** EN DISPUTA ** en el archivo fs/nfsd/nfs3xdr.c en el kernel de Linux versiones hasta 5.10.8, cuando se presenta una exportación NFS de un subdirectorio ... • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •
CVSS: 8.1EPSS: 0%CPEs: 5EXPL: 0CVE-2020-28374 – kernel: SCSI target (LIO) write to any block on ILO backstore
https://notcve.org/view.php?id=CVE-2020-28374
13 Jan 2021 — In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can be used by remote attackers to read or write files via directory traversal in an XCOPY request, aka CID-2896c93811e3. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. The attacker gains control over file access because I/O operations are proxied via an attacker-selected backstore. En el archivo drivers/target/target_core_xcopy.c... • http://packetstormsecurity.com/files/161229/Kernel-Live-Patch-Security-Notice-LSN-0074-1.html • CWE-20: Improper Input Validation CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •
CVSS: 7.0EPSS: 0%CPEs: 31EXPL: 3CVE-2020-25668
https://notcve.org/view.php?id=CVE-2020-25668
06 Jan 2021 — A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op. Se encontró un fallo en el Kernel de Linux porque el acceso a la variable global fg_console no está correctamente sincronizado, conllevando a un uso de la memoria previamente liberada en la función con_font_op • https://github.com/hshivhare67/Kernel_4.1.15_CVE-2020-25668 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-662: Improper Synchronization •
CVSS: 8.8EPSS: 0%CPEs: 12EXPL: 0CVE-2020-36158 – kernel: buffer overflow in mwifiex_cmd_802_11_ad_hoc_start function in drivers/net/wireless/marvell/mwifiex/join.c via a long SSID value
https://notcve.org/view.php?id=CVE-2020-36158
05 Jan 2021 — mwifiex_cmd_802_11_ad_hoc_start in drivers/net/wireless/marvell/mwifiex/join.c in the Linux kernel through 5.10.4 might allow remote attackers to execute arbitrary code via a long SSID value, aka CID-5c455c5ab332. La función mwifiex_cmd_802_11_ad_hoc_start en el archivo drivers/net/wireless/marvell/mwifiex/join.c en el kernel de Linux versiones hasta 5.10.4, podría permitir a atacantes remotos ejecutar código arbitrario por medio de un valor SSID grande, también se conoce como CID-5c455c5ab332 A flaw was fo... • https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c455c5ab332773464d02ba17015acdca198f03d • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: 8.8EPSS: 3%CPEs: 3EXPL: 0CVE-2021-20226 – Linux Kernel io_uring Use-After-Free Privilege Escalation Vulnerability
https://notcve.org/view.php?id=CVE-2021-20226
04 Jan 2021 — A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability. Se encontró un fallo de uso de la memoria previamente liberada ... • https://bugzilla.redhat.com/show_bug.cgi?id=1873476 • CWE-416: Use After Free •
CVSS: 8.8EPSS: 0%CPEs: 15EXPL: 0CVE-2020-29569
https://notcve.org/view.php?id=CVE-2020-29569
15 Dec 2020 — 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. • https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html • CWE-416: Use After Free •
CVSS: 7.2EPSS: 0%CPEs: 11EXPL: 2CVE-2020-27777 – kernel: powerpc: RTAS calls can be used to compromise kernel integrity
https://notcve.org/view.php?id=CVE-2020-27777
15 Dec 2020 — A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel. Se encontró un fallo en la manera en que RTAS manejaba los accesos a la memoria en el espacio de usuario para la comunicación del kernel. En un sistema invitado bloqueado (generalm... • https://bugzilla.redhat.com/show_bug.cgi?id=1900844 • CWE-862: Missing Authorization •
CVSS: 5.7EPSS: 0%CPEs: 11EXPL: 0CVE-2020-27825
https://notcve.org/view.php?id=CVE-2020-27825
11 Dec 2020 — A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat. Se encontró un fallo de uso de la memoria previamente liberada en el archivo kernel/trace/ring_buffer.c en el kernel de Linux (anteriores a la versión 5.10-rc1)... • https://bugzilla.redhat.com/show_bug.cgi?id=1905155 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •