CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2023-31085
https://notcve.org/view.php?id=CVE-2023-31085
An issue was discovered in drivers/mtd/ubi/cdev.c in the Linux kernel 6.2. There is a divide-by-zero error in do_div(sz,mtd->erasesize), used indirectly by ctrl_cdev_ioctl, when mtd->erasesize is 0. • https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=017c73a34a661a861712f7cc1393a123e5b2208c https://lore.kernel.org/all/687864524.118195.1681799447034.JavaMail.zimbra%40nod.at https://security.netapp.com/advisory/ntap-20230929-0003 • CWE-369: Divide By Zero •
CVSS: 4.7EPSS: 0%CPEs: 1EXPL: 0CVE-2023-31083 – kernel: race condition between HCIUARTSETPROTO and HCIUARTGETPROTO in hci_uart_tty_ioctl
https://notcve.org/view.php?id=CVE-2023-31083
An issue was discovered in drivers/bluetooth/hci_ldisc.c in the Linux kernel 6.2. In hci_uart_tty_ioctl, there is a race condition between HCIUARTSETPROTO and HCIUARTGETPROTO. HCI_UART_PROTO_SET is set before hu->proto is set. A NULL pointer dereference may occur. A NULL pointer dereference flaw was found in the Linux kernel’s Bluetooth HCI UART driver. • https://bugzilla.suse.com/show_bug.cgi?id=1210780 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9c33663af9ad115f90c076a1828129a3fbadea98 https://lore.kernel.org/all/CA+UBctC3p49aTgzbVgkSZ2+TQcqq4fPDO7yZitFT5uBPDeCO2g%40mail.gmail.com https://security.netapp.com/advisory/ntap-20230929-0003 https://access.redhat.com/security/cve/CVE-2023-31083 https://bugzilla.redhat.com/show_bug.cgi?id=2213132 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2023-31082
https://notcve.org/view.php?id=CVE-2023-31082
An issue was discovered in drivers/tty/n_gsm.c in the Linux kernel 6.2. There is a sleeping function called from an invalid context in gsmld_write, which will block the kernel. Note: This has been disputed by 3rd parties as not a valid vulnerability. • https://bugzilla.suse.com/show_bug.cgi?id=1210781 https://lore.kernel.org/all/CA+UBctCZok5FSQ=LPRA+A-jocW=L8FuMVZ_7MNqhh483P5yN8A%40mail.gmail.com https://security.netapp.com/advisory/ntap-20230929-0003 • CWE-763: Release of Invalid Pointer or Reference •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2023-31081
https://notcve.org/view.php?id=CVE-2023-31081
An issue was discovered in drivers/media/test-drivers/vidtv/vidtv_bridge.c in the Linux kernel 6.2. There is a NULL pointer dereference in vidtv_mux_stop_thread. In vidtv_stop_streaming, after dvb->mux=NULL occurs, it executes vidtv_mux_stop_thread(dvb->mux). • https://bugzilla.suse.com/show_bug.cgi?id=1210782 https://lore.kernel.org/all/CA+UBctDXyiosaiR7YNKCs8k0aWu4gU+YutRcnC+TDJkXpHjQag%40mail.gmail.com https://security.netapp.com/advisory/ntap-20230929-0003 • CWE-476: NULL Pointer Dereference •
CVSS: 5.6EPSS: 0%CPEs: 2EXPL: 2CVE-2023-1998 – Spectre v2 SMT mitigations problem in Linux kernel
https://notcve.org/view.php?id=CVE-2023-1998
The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same behavior can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot command line. This happened because when plain IBRS was enabled (not enhanced IBRS), the kernel had some logic that determined that STIBP was not needed. The IBRS bit implicitly protects against cross-thread branch target injection. However, with legacy IBRS, the IBRS bit was cleared on returning to userspace, due to performance reasons, which disabled the implicit STIBP and left userspace threads vulnerable to cross-thread branch target injection against which STIBP protects. • https://www.exploit-db.com/exploits/51384 https://github.com/google/security-research/security/advisories/GHSA-mj4w-6495-6crx https://github.com/torvalds/linux/commit/6921ed9049bc7457f66c1596c5b78aec0dae4a9d https://kernel.dance/#6921ed9049bc7457f66c1596c5b78aec0dae4a9d https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html https://access.redhat.com/security/cve/CVE-2023-1998 https://bugzilla.redhat.com/show_bug.cgi?id=2187257 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-203: Observable Discrepancy CWE-1303: Non-Transparent Sharing of Microarchitectural Resources •