CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2024-35924 – usb: typec: ucsi: Limit read size on v1.2
https://notcve.org/view.php?id=CVE-2024-35924
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Limit read size on v1.2 Between UCSI 1.2 and UCSI 2.0, the size of the MESSAGE_IN region was increased from 16 to 256. In order to avoid overflowing reads for older systems, add a mechanism to use the read UCSI version to truncate read sizes on UCSI v1.2. En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: usb: typec: ucsi: Limitar el tamaño de lectura en v1.2 Entre UCSI 1.2 y UCSI 2.0, el tamaño de la región MESSAGE_IN se incrementó de 16 a 256. Para evitar el desbordamiento lecturas para sistemas más antiguos, agregue un mecanismo para usar la versión de lectura UCSI para truncar los tamaños de lectura en UCSI v1.2. • https://git.kernel.org/stable/c/266f403ec47573046dee4bcebda82777ce702c40 https://git.kernel.org/stable/c/0defcaa09d3b21e8387829ee3a652c43fa91e13f https://git.kernel.org/stable/c/b3db266fb031fba88c423d4bb8983a73a3db6527 https://access.redhat.com/security/cve/CVE-2024-35924 https://bugzilla.redhat.com/show_bug.cgi?id=2281758 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-35922 – fbmon: prevent division by zero in fb_videomode_from_videomode()
https://notcve.org/view.php?id=CVE-2024-35922
In the Linux kernel, the following vulnerability has been resolved: fbmon: prevent division by zero in fb_videomode_from_videomode() The expression htotal * vtotal can have a zero value on overflow. It is necessary to prevent division by zero like in fb_var_to_videomode(). Found by Linux Verification Center (linuxtesting.org) with Svace. En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: fbmon: evita la división por cero en fb_videomode_from_videomode() La expresión htotal * vtotal puede tener un valor cero en caso de desbordamiento. Es necesario evitar la división por cero como en fb_var_to_videomode(). Encontrado por el Centro de verificación de Linux (linuxtesting.org) con Svace. • https://git.kernel.org/stable/c/1fb52bc1de55e9e0bdf71fe078efd4da0889710f https://git.kernel.org/stable/c/72d091b7515e0532ee015e144c906f3bcfdd6270 https://git.kernel.org/stable/c/951838fee462aa01fa2a6a91d56f9a495082e7f0 https://git.kernel.org/stable/c/48d6bcfc31751ca2e753d901a2d82f27edf8a029 https://git.kernel.org/stable/c/664206ff8b019bcd1e55b10b2eea3add8761b971 https://git.kernel.org/stable/c/3d4b909704bf2114f64f87363fa22b5ef8ac4a33 https://git.kernel.org/stable/c/1b107d637fed68a787da77a3514ad06e57abd0b4 https://git.kernel.org/stable/c/c2d953276b8b27459baed1277a4fdd5dd •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2023-52699 – sysv: don't call sb_bread() with pointers_lock held
https://notcve.org/view.php?id=CVE-2023-52699
In the Linux kernel, the following vulnerability has been resolved: sysv: don't call sb_bread() with pointers_lock held syzbot is reporting sleep in atomic context in SysV filesystem [1], for sb_bread() is called with rw_spinlock held. A "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" bug and a "sb_bread() with write_lock(&pointers_lock)" bug were introduced by "Replace BKL for chain locking with sysvfs-private rwlock" in Linux 2.5.12. Then, "[PATCH] err1-40: sysvfs locking fix" in Linux 2.6.8 fixed the former bug by moving pointers_lock lock to the callers, but instead introduced a "sb_bread() with read_lock(&pointers_lock)" bug (which made this problem easier to hit). Al Viro suggested that why not to do like get_branch()/get_block()/ find_shared() in Minix filesystem does. And doing like that is almost a revert of "[PATCH] err1-40: sysvfs locking fix" except that get_branch() from with find_shared() is called without write_lock(&pointers_lock). En el kernel de Linux, se resolvió la siguiente vulnerabilidad: sysv: no llame a sb_bread() con pointers_lock retenido syzbot informa suspensión en contexto atómico en el sistema de archivos SysV [1], porque sb_bread() se llama con rw_spinlock retenido. Un error "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" y un error "sb_bread() with write_lock(&pointers_lock)" fueron introducidos por "Reemplazar BKL para bloqueo de cadena con sysvfs-private rwlock" en Linux 2.5.12. Luego, "[PATCH] err1-40: corrección de bloqueo de sysvfs" en Linux 2.6.8 solucionó el error anterior moviendo el bloqueo pointers_lock a las personas que llaman, pero en su lugar introdujo un error "sb_bread() con read_lock(&pointers_lock)" (que hizo que esto problema más fácil de abordar). • https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76 https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1 https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927 https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09 https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3 https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441ab •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-35878 – of: module: prevent NULL pointer dereference in vsnprintf()
https://notcve.org/view.php?id=CVE-2024-35878
In the Linux kernel, the following vulnerability has been resolved: of: module: prevent NULL pointer dereference in vsnprintf() In of_modalias(), we can get passed the str and len parameters which would cause a kernel oops in vsnprintf() since it only allows passing a NULL ptr when the length is also 0. Also, we need to filter out the negative values of the len parameter as these will result in a really huge buffer since snprintf() takes size_t parameter while ours is ssize_t... Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: de: módulo: evita la desreferencia del puntero NULL en vsnprintf() En of_modalias(), podemos pasar los parámetros str y len que provocarían un kernel ups en vsnprintf() ya que solo permite pasar un ptr NULL cuando la longitud también es 0. Además, necesitamos filtrar los valores negativos del parámetro len ya que estos darán como resultado un búfer realmente enorme ya que snprintf() toma el parámetro size_t mientras que el nuestro es ssize_t... Encontrado por el Centro de verificación de Linux (linuxtesting.org) con la herramienta de análisis estático Svace. • https://git.kernel.org/stable/c/e4a449368a2ce6d57a775d0ead27fc07f5a86e5b https://git.kernel.org/stable/c/544561dc56f7e69a053c25e11e6170f48bb97898 https://git.kernel.org/stable/c/a1aa5390cc912934fee76ce80af5f940452fa987 •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2024-35875 – x86/coco: Require seeding RNG with RDRAND on CoCo systems
https://notcve.org/view.php?id=CVE-2024-35875
In the Linux kernel, the following vulnerability has been resolved: x86/coco: Require seeding RNG with RDRAND on CoCo systems There are few uses of CoCo that don't rely on working cryptography and hence a working RNG. Unfortunately, the CoCo threat model means that the VM host cannot be trusted and may actively work against guests to extract secrets or manipulate computation. Since a malicious host can modify or observe nearly all inputs to guests, the only remaining source of entropy for CoCo guests is RDRAND. If RDRAND is broken -- due to CPU hardware fault -- the RNG as a whole is meant to gracefully continue on gathering entropy from other sources, but since there aren't other sources on CoCo, this is catastrophic. This is mostly a concern at boot time when initially seeding the RNG, as after that the consequences of a broken RDRAND are much more theoretical. So, try at boot to seed the RNG using 256 bits of RDRAND output. If this fails, panic(). This will also trigger if the system is booted without RDRAND, as RDRAND is essential for a safe CoCo boot. Add this deliberately to be "just a CoCo x86 driver feature" and not part of the RNG itself. • https://git.kernel.org/stable/c/22943e4fe4b3a2dcbadc3d38d5bf840bbdbfe374 https://git.kernel.org/stable/c/453b5f2dec276c1bb4ea078bf8c0da57ee4627e5 https://git.kernel.org/stable/c/08044b08b37528b82f70a87576c692b4e4b7716e https://git.kernel.org/stable/c/99485c4c026f024e7cb82da84c7951dbe3deb584 https://access.redhat.com/security/cve/CVE-2024-35875 https://bugzilla.redhat.com/show_bug.cgi?id=2281727 •