CVSS: 8.3EPSS: 3%CPEs: 11EXPL: 1CVE-2020-14305 – kernel: memory corruption in Voice over IP nf_conntrack_h323 module
https://notcve.org/view.php?id=CVE-2020-14305
An out-of-bounds memory write flaw was found in how the Linux kernel’s Voice Over IP H.323 connection tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote user to crash the system, causing a denial of service. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Se encontró un fallo de escritura de memoria fuera de límites en la manera en que la funcionalidad connection tracking Voice Over IP H.323 del kernel de Linux, manejaba las conexiones en el puerto ipv6 1720. Este fallo permite a un usuario remoto no autenticado bloquear el sistema, causando una denegación de servicio. • https://bugs.openvz.org/browse/OVZ-7188 https://bugzilla.redhat.com/show_bug.cgi?id=1850716 https://patchwork.ozlabs.org/project/netfilter-devel/patch/c2385b5c-309c-cc64-2e10-a0ef62897502%40virtuozzo.com https://security.netapp.com/advisory/ntap-20201210-0004 https://access.redhat.com/security/cve/CVE-2020-14305 • CWE-787: Out-of-bounds Write •
CVSS: 4.1EPSS: 0%CPEs: 11EXPL: 2CVE-2020-25656 – kernel: use-after-free in read in vt_do_kdgkb_ioctl
https://notcve.org/view.php?id=CVE-2020-25656
A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality. Se encontró un fallo en el kernel de Linux. • https://bugzilla.redhat.com/show_bug.cgi?id=1888726 https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html https://lkml.org/lkml/2020/10/16/84 https://lkml.org/lkml/2020/10/29/528 https://www.starwindsoftware.com/security/sw-20210325-0006 https://access.redhat.com/security/cve/CVE-2020-25656 • CWE-416: Use After Free •
CVSS: 6.2EPSS: 0%CPEs: 8EXPL: 0CVE-2020-25704 – kernel: perf_event_parse_addr_filter memory
https://notcve.org/view.php?id=CVE-2020-25704
A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service. Se encontró una perdida de memoria de fallo en el subsistema de monitoreo del rendimiento del kernel de Linux en el modo si se usaba PERF_EVENT_IOC_SET_FILTER. Un usuario local podría utilizar este fallo para privar los recursos causando una denegación de servicio A memory leak flaw was found in the Linux kernel’s performance monitoring subsystem when using PERF_EVENT_IOC_SET_FILTER. This flaw allows a local user to starve the resources, causing a denial of service. • https://bugzilla.redhat.com/show_bug.cgi?id=1895961 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bdb157cdebbf95a1cd94ed2e01b338714075d00 https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html https://www.openwall.com/lists/oss-security/2020/11/09/1 https://www.starwindsoftware.com/security/sw-20220802-0003 https://access.redhat.com/security/cve/CVE-2020-25704 • CWE-401: Missing Release of Memory after Effective Lifetime •
CVSS: 5.4EPSS: 0%CPEs: 3EXPL: 0CVE-2019-20934 – kernel: use-after-free in show_numa_stats function
https://notcve.org/view.php?id=CVE-2019-20934
An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c. Se detectó un problema en el kernel de Linux versiones anteriores a 5.2.6. En los sistemas NUMA, el programador fair de Linux presenta un uso de la memoria previamente liberada en la función show_numa_stats() porque las estadísticas de fallo de NUMA son liberadas inapropiadamente, también se conoce como CID-16d51a590a8c A flaw was found in the Linux kernel’s implementation of displaying NUMA statistics, where displaying the scheduler statistics could trigger a use-after-free in show_numa_stats() and display the kernel memory to userspace. The highest threat from this vulnerability is to system availability. • https://bugs.chromium.org/p/project-zero/issues/detail?id=1913 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.6 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16d51a590a8ce3befb1308e0e7ab77f3b661af33 https://access.redhat.com/security/cve/CVE-2019-20934 https://bugzilla.redhat.com/show_bug.cgi?id=1902788 • CWE-416: Use After Free •
CVSS: 7.0EPSS: 0%CPEs: 13EXPL: 1CVE-2020-29368 – kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check
https://notcve.org/view.php?id=CVE-2020-29368
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1. Se detectó un problema en la función __split_huge_pmd en el archivo mm/huge_memory.c en el kernel de Linux versiones anteriores a 5.7.5. La implementación copy-on-write puede otorgar acceso de escritura no previsto debido a una condición de carrera en una comprobación de conteo de mapas THP, también se conoce como CID-c444eb564fb1 An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check. • https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040 https://security.netapp.com/advisory/ntap-20210108-0002 https://access.redhat.com/security/cve/CVE-2020-29368 https://bugzilla.redhat.com/show_bug.cgi?id=1903244 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •