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: 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 •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2023-4244 – Use-after-free in Linux kernel's netfilter: nf_tables component
https://notcve.org/view.php?id=CVE-2023-4244
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability. We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8. Una vulnerabilidad de use-after-free en el netfilter del kernel de Linux: nf_tables componente puede ser explotado para lograr la escalada de privilegios locales. Debido a una condición de ejecución entre nf_tables transacción del plano de control de enlace de red y la recolección de elementos no utilizados de nft_set, es posible desbordar el contador de referencia causando una vulnerabilidad de use-after-free. Recomendamos actualizar al commit anterior 3e91b0ebd994635df2346353322ac51ce84ce6d8. A use-after-free flaw was found in the Linux kernel’s nftables sub-component due to a race problem between the set GC and transaction in the Linux Kernel. • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e91b0ebd994635df2346353322ac51ce84ce6d8 https://kernel.dance/3e91b0ebd994635df2346353322ac51ce84ce6d8 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-2023-4244 https://bugzilla.redhat.com/show_bug.cgi?id=2235306 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 0CVE-2023-4208 – Use-after-free in Linux kernel's net/sched: cls_u32 component
https://notcve.org/view.php?id=CVE-2023-4208
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81. Una vulnerabilidad de Use After Free en el componente net/sched: cls_u32 del kernel de Linux puede ser explotada para conseguir una escalada local de privilegios. Cuando se llama a u32_change() en un filtro existente, toda la estructura tcf_result se copia siempre en la nueva instancia del filtro. Esto causa un problema cuando se actualiza un filtro vinculado a una clase, ya que tcf_unbind_filter() siempre llama a la instancia antigua en la ruta de éxito, disminuyendo filter_cnt de la clase aún referenciada y permitiendo que se elimine, lo que lleva a un Use After Free. • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 https://kernel.dance/3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html https://www.debian.org/security/2023/dsa-5492 https://access.redhat.com/security/cve/CVE-2023-4208 https://bugzilla.redhat.com/show_bug.cgi?id=2225511 • CWE-416: Use After Free •