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CVSS: 7.0EPSS: 0%CPEs: 6EXPL: 1

28 Nov 2020 — An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe. Se detectó un problema en el archivo mm/mmap.c en el kernel de Linux versiones anteriores a 5.7.11. Se presenta una condición de carrera entre determinadas funciones expand (expand_downwards y expand_upwards) y operaciones de liberación de page-table de una llamada mun... • http://www.openwall.com/lists/oss-security/2021/02/10/6 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •

CVSS: 3.3EPSS: 0%CPEs: 1EXPL: 1

28 Nov 2020 — An issue was discovered in romfs_dev_read in fs/romfs/storage.c in the Linux kernel before 5.8.4. Uninitialized memory leaks to userspace, aka CID-bcf85fcedfdd. Se detectó un problema en la función romfs_dev_read en el archivo fs/romfs/storage.c en el kernel de Linux versiones anteriores a 5.8.4. Una pérdida de memoria no inicializada en el espacio de usuario, también se conoce como CID-bcf85fcedfdd • https://bugs.chromium.org/p/project-zero/issues/detail?id=2077 • CWE-908: Use of Uninitialized Resource •

CVSS: 3.6EPSS: 0%CPEs: 12EXPL: 2

28 Nov 2020 — An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58. Se detectó un problema en el kernel de Linux versiones anteriores a 5.7.3, relacionado con los archivos mm/gup.c y mm/huge_memory.c. La implementación de la función get_user_pages (también se conoce c... • http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-863: Incorrect Authorization •

CVSS: 4.9EPSS: 0%CPEs: 1EXPL: 1

23 Nov 2020 — The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized. El kernel de Linux anterior a versión 5.8 es vulnerable a una desreferencia del puntero NULL en drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() que permite a usuarios locales causar una denegación de servicio utilizando el puntero p-)serial_... • https://lkml.org/lkml/2020/7/21/80 • CWE-476: NULL Pointer Dereference •

CVSS: 7.2EPSS: 0%CPEs: 39EXPL: 2

23 Nov 2020 — Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field. La vulnerabilidad de tipo use-after-free en el archivo fs/block_dev.c en el kernel de Linux versiones anteriores a 5.8, permite a usuarios locales obtener privilegios o causar una denegación de servicio al aprovechar el acceso inapropiado a un determinado campo de error A use-after-free flaw was observed in bl... • https://github.com/Trinadh465/linux-4.19.72_CVE-2020-15436 • CWE-416: Use After Free •

CVSS: 7.8EPSS: 1%CPEs: 4EXPL: 0

22 Nov 2020 — A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Se encontró un fallo en el kernel de Linux. Se encontró un fallo de uso de la memoria previamente liberada en el subsistema perf que permitía a un atacante local con permiso p... • https://bugzilla.redhat.com/show_bug.cgi?id=1862849 • CWE-416: Use After Free •

CVSS: 6.1EPSS: 0%CPEs: 2EXPL: 1

20 Nov 2020 — A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height. Una lectura fuera de límites en fbcon en el kernel de Linux versiones anteriores a 5.9.7, podría ser usada por parte de atacantes locales para leer información privilegiada o potencialmente bloquear el kernel, tambi... • http://www.openwall.com/lists/oss-security/2020/11/25/1 • CWE-125: Out-of-bounds Read •

CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0

19 Nov 2020 — An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once. Se detectó un problema en el archivo drivers/accessibility/speakup/spk_ttyio.c en el kernel de Linux versiones hasta 5.9.9. Los atacantes locales en sistemas con el controlador speakup podrían cau... • http://www.openwall.com/lists/oss-security/2020/11/19/5 • CWE-763: Release of Invalid Pointer or Reference •

CVSS: 6.1EPSS: 0%CPEs: 1EXPL: 0

18 Nov 2020 — A buffer over-read (at the framebuffer layer) in the fbcon code in the Linux kernel before 5.8.15 could be used by local attackers to read kernel memory, aka CID-6735b4632def. Una lectura excesiva de buffer (en la capa framebuffer) en el código fbcon en el kernel de Linux versiones anteriores a 5.8.15, podría ser usada por unos atacantes locales para leer la memoria del kernel, también se conoce como CID-6735b4632def An out-of-bounds (OOB) memory access flaw was found in fbcon_get_font() in drivers/video/fb... • https://bugzilla.suse.com/show_bug.cgi?id=1178886 • CWE-125: Out-of-bounds Read •

CVSS: 7.4EPSS: 0%CPEs: 3EXPL: 2

17 Nov 2020 — A flaw in ICMP packets in the Linux kernel may allow an attacker to quickly scan open UDP ports. This flaw allows an off-path remote attacker to effectively bypass source port UDP randomization. Software that relies on UDP source port randomization are indirectly affected as well on the Linux Based Products (RUGGEDCOM RM1224: All versions between v5.0 and v6.4, SCALANCE M-800: All versions between v5.0 and v6.4, SCALANCE S615: All versions between v5.0 and v6.4, SCALANCE SC-600: All versions prior to v2.1.3... • https://github.com/tdwyer/CVE-2020-25705 • CWE-330: Use of Insufficiently Random Values •