CVSS: 3.3EPSS: 0%CPEs: 1EXPL: 0CVE-2020-36766
https://notcve.org/view.php?id=CVE-2020-36766
An issue was discovered in the Linux kernel before 5.8.6. drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users, because of directly assigning log_addrs with a hole in the struct. Se descubrió un problema en el kernel de Linux anterior a 5.8.6. drivers/media/cec/core/cec-api.c pierde un byte de memoria del kernel en hardware específico a usuarios sin privilegios, debido a la asignación directa de log_addrs con un agujero en la estructura. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.6 https://github.com/torvalds/linux/commit/6c42227c3467549ddc65efe99c869021d2f4a570 •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 2CVE-2023-4921 – Use-after-free in Linux kernel's net/sched: sch_qfq component
https://notcve.org/view.php?id=CVE-2023-4921
A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue(). We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8. Una vulnerabilidad de use-after-free en el componente net/sched: sch_qfq del kernel de Linux se puede explotar para lograr una escalada de privilegios local. Cuando el complemento qdisc se utiliza como una clase de qfq qdisc, el envío de paquetes de red activa el uso después de la liberación en qfq_dequeue() debido al controlador .peek incorrecto de sch_plug y la falta de verificación de errores en agg_dequeue(). Recomendamos actualizar al commit anterior 8fc134fee27f2263988ae38920bc03da416b03d8. A use-after-free flaw was found in qfq_dequeue and agg_dequeue in net/sched/sch_qfq.c in the Traffic Control (QoS) subsystem in the Linux kernel. • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8fc134fee27f2263988ae38920bc03da416b03d8 https://kernel.dance/8fc134fee27f2263988ae38920bc03da416b03d8 https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html https://access.redhat.com/security/cve/CVE-2023-4921 https://bugzilla.redhat.com/show_bug.cgi?id=2245514 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 10EXPL: 0CVE-2023-34319 – Linux: buffer overrun in netback due to unusual packet
https://notcve.org/view.php?id=CVE-2023-34319
The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver. La solución para XSA-423 agregó lógica al controlador netback de Linux para lidiar con una interfaz que divide un paquete de tal manera que no todos los encabezados vengan en una sola pieza. Desafortunadamente, la lógica introducida allí no tuvo en cuenta el caso extremo de que todo el paquete se divida en tantas partes como lo permita el protocolo, pero aún así sea más pequeño que el área que se trata especialmente para mantener todos los (posibles) encabezados juntos. • http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html https://security.netapp.com/advisory/ntap-20240202-0001 https://xenbits.xenproject.org/xsa/advisory-432.html • CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2023-4623 – Use-after-free in Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component
https://notcve.org/view.php?id=CVE-2023-4623
A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation. If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free. We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f. Una vulnerabilidad de Use After Free en el componente net/sched: sch_hfsc (HFSC qdisc traffic control) del kernel de Linux puede ser explotada para conseguir una escalada local de privilegios. Si una clase con una curva de compartición de enlaces (es decir, con la flag HFSC_FSC establecida) tiene un padre sin una curva de compartición de enlaces, entonces init_vf() llamará a vttree_insert() en el padre, pero vttree_remove() se omitirá en update_vf(). Esto deja un puntero colgando que puede causar un Use-After-Free. • http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b3d26c5702c7d6c45456326e56d2ccf3f103e60f https://kernel.dance/b3d26c5702c7d6c45456326e56d2ccf3f103e60f https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html https://access.redhat.com/security/cve/CVE-2023-4623 https://bugzilla.redhat.com/show_bug.cgi?id=2237757 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 1CVE-2023-4622 – Use-after-free in Linux kernel's af_unix component
https://notcve.org/view.php?id=CVE-2023-4622
A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. Se puede explotar una vulnerabilidad de use-after-free en el componente Linux kernel's af_unix para lograr una escalada de privilegios local. La función unix_stream_sendpage() intenta añadir datos al último skb en la cola peer's recv sin bloquear la cola. Por lo tanto, existe una carrera donde unix_stream_sendpage() podría acceder a un skb sin bloqueo que está siendo liberado mediante la recolección de basura, resultando en use-after-free. • https://github.com/0range1337/CVE-CVE-2023-4622 http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02c https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html https://www.debian.org/security/2023 • CWE-416: Use After Free •