CVSS: 7.5EPSS: 0%CPEs: 22EXPL: 3CVE-2023-0045 – Incorrect indirect branch prediction barrier in the Linux Kernel
https://notcve.org/view.php?id=CVE-2023-0045
The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96 • https://github.com/ASkyeye/CVE-2023-0045 https://github.com/es0j/CVE-2023-0045 https://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96 https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8 https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html https://security.netapp.com/advisory/ntap-20230714-0001 • CWE-610: Externally Controlled Reference to a Resource in Another Sphere •
CVSS: 7.0EPSS: 0%CPEs: 1EXPL: 0CVE-2023-0597 – kernel: x86/mm: Randomize per-cpu entry area
https://notcve.org/view.php?id=CVE-2023-0597
A flaw possibility of memory leak in the Linux kernel cpu_entry_area mapping of X86 CPU data to memory was found in the way user can guess location of exception stack(s) or other important data. A local user could use this flaw to get access to some important data with expected location in memory. A possible unauthorized memory access flaw was found in the Linux kernel cpu_entry_area mapping of X86 CPU data to memory, where a user may guess the location of exception stack(s) or other important data. This issue could allow a local user to gain access to some important data with expected location in memory. • http://www.openwall.com/lists/oss-security/2023/07/28/1 https://git.kernel.org/linus/97e3d26b5e5f371b3ee223d94dd123e6c442ba80 https://access.redhat.com/security/cve/CVE-2023-0597 https://bugzilla.redhat.com/show_bug.cgi?id=2165926 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-401: Missing Release of Memory after Effective Lifetime •
CVSS: 5.7EPSS: 0%CPEs: 3EXPL: 0CVE-2023-23039
https://notcve.org/view.php?id=CVE-2023-23039
An issue was discovered in the Linux kernel through 6.2.0-rc2. drivers/tty/vcc.c has a race condition and resultant use-after-free if a physically proximate attacker removes a VCC device while calling open(), aka a race condition between vcc_open() and vcc_remove(). • https://lkml.org/lkml/2023/1/1/169 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2023-26242
https://notcve.org/view.php?id=CVE-2023-26242
afu_mmio_region_get_by_offset in drivers/fpga/dfl-afu-region.c in the Linux kernel through 6.1.12 has an integer overflow. • https://bugzilla.suse.com/show_bug.cgi?id=1208518 https://patchwork.kernel.org/project/linux-fpga/patch/20230206054326.89323-1-k1rh4.lee%40gmail.com https://security.netapp.com/advisory/ntap-20230406-0002 • CWE-190: Integer Overflow or Wraparound •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2023-23586 – Use after free in io_uring in the Linux Kernel
https://notcve.org/view.php?id=CVE-2023-23586
Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring • https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93 https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93 • CWE-416: Use After Free •