CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-47749 – RDMA/cxgb4: Added NULL check for lookup_atid
https://notcve.org/view.php?id=CVE-2024-47749
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Added NULL check for lookup_atid The lookup_atid() function can return NULL if the ATID is invalid or does not exist in the identifier table, which could lead to dereferencing a null pointer without a check in the `act_establish()` and `act_open_rpl()` functions. Add a NULL check to prevent null pointer dereferencing. Found by Linux Verification Center (linuxtesting.org) with SVACE. • https://git.kernel.org/stable/c/cfdda9d764362ab77b11a410bb928400e6520d57 https://git.kernel.org/stable/c/dd598ac57dcae796cb58551074660c39b43fb155 https://git.kernel.org/stable/c/b11318dc8a1ec565300bb1a9073095af817cc508 https://git.kernel.org/stable/c/39cb9f39913566ec5865581135f3e8123ad1aee1 https://git.kernel.org/stable/c/0d50ae281a1712b9b2ca72830a96b8f11882358d https://git.kernel.org/stable/c/54aaa3ed40972511e423b604324b881425b9ff1e https://git.kernel.org/stable/c/b9c94c8ba5a713817cffd74c4bacc05187469624 https://git.kernel.org/stable/c/e766e6a92410ca269161de059fff0843b •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-47745 – mm: call the security_mmap_file() LSM hook in remap_file_pages()
https://notcve.org/view.php?id=CVE-2024-47745
In the Linux kernel, the following vulnerability has been resolved: mm: call the security_mmap_file() LSM hook in remap_file_pages() The remap_file_pages syscall handler calls do_mmap() directly, which doesn't contain the LSM security check. And if the process has called personality(READ_IMPLIES_EXEC) before and remap_file_pages() is called for RW pages, this will actually result in remapping the pages to RWX, bypassing a W^X policy enforced by SELinux. So we should check prot by security_mmap_file LSM hook in the remap_file_pages syscall handler before do_mmap() is called. Otherwise, it potentially permits an attacker to bypass a W^X policy enforced by SELinux. The bypass is similar to CVE-2016-10044, which bypass the same thing via AIO and can be found in [1]. The PoC: $ cat > test.c int main(void) { size_t pagesz = sysconf(_SC_PAGE_SIZE); int mfd = syscall(SYS_memfd_create, "test", 0); const char *buf = mmap(NULL, 4 * pagesz, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0); unsigned int old = syscall(SYS_personality, 0xffffffff); syscall(SYS_personality, READ_IMPLIES_EXEC | old); syscall(SYS_remap_file_pages, buf, pagesz, 0, 2, 0); syscall(SYS_personality, old); // show the RWX page exists even if W^X policy is enforced int fd = open("/proc/self/maps", O_RDONLY); unsigned char buf2[1024]; while (1) { int ret = read(fd, buf2, 1024); if (ret <= 0) break; write(1, buf2, ret); } close(fd); } $ gcc test.c -o test $ ./test | grep rwx 7f1836c34000-7f1836c35000 rwxs 00002000 00:01 2050 /memfd:test (deleted) [PM: subject line tweaks] • https://git.kernel.org/stable/c/49d3a4ad57c57227c3b0fd6cd4188b2a5ebd6178 https://git.kernel.org/stable/c/3393fddbfa947c8e1fdcc4509226905ffffd8b89 https://git.kernel.org/stable/c/ce14f38d6ee9e88e37ec28427b4b93a7c33c70d3 https://git.kernel.org/stable/c/ea7e2d5e49c05e5db1922387b09ca74aa40f46e2 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-47726 – f2fs: fix to wait dio completion
https://notcve.org/view.php?id=CVE-2024-47726
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to wait dio completion It should wait all existing dio write IOs before block removal, otherwise, previous direct write IO may overwrite data in the block which may be reused by other inode. • https://git.kernel.org/stable/c/e3db757ff9b7101ae68650ac5f6dd5743b68164e https://git.kernel.org/stable/c/96cfeb0389530ae32ade8a48ae3ae1ac3b6c009d •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-47725 – dm-verity: restart or panic on an I/O error
https://notcve.org/view.php?id=CVE-2024-47725
In the Linux kernel, the following vulnerability has been resolved: dm-verity: restart or panic on an I/O error Maxim Suhanov reported that dm-verity doesn't crash if an I/O error happens. In theory, this could be used to subvert security, because an attacker can create sectors that return error with the Write Uncorrectable command. Some programs may misbehave if they have to deal with EIO. This commit fixes dm-verity, so that if "panic_on_corruption" or "restart_on_corruption" was specified and an I/O error happens, the machine will panic or restart. This commit also changes kernel_restart to emergency_restart - kernel_restart calls reboot notifiers and these reboot notifiers may wait for the bio that failed. emergency_restart doesn't call the notifiers. • https://git.kernel.org/stable/c/cada2646b7483cce370eb3b046659df31d9d34d1 https://git.kernel.org/stable/c/b332bcca59143cfdd000957f8b78c28dd2ac1da4 https://git.kernel.org/stable/c/338b32a232bbee39e52dd1486cbc0c9f458d4d69 https://git.kernel.org/stable/c/e6a3531dd542cb127c8de32ab1e54a48ae19962b •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-47723 – jfs: fix out-of-bounds in dbNextAG() and diAlloc()
https://notcve.org/view.php?id=CVE-2024-47723
In the Linux kernel, the following vulnerability has been resolved: jfs: fix out-of-bounds in dbNextAG() and diAlloc() In dbNextAG() , there is no check for the case where bmp->db_numag is greater or same than MAXAG due to a polluted image, which causes an out-of-bounds. Therefore, a bounds check should be added in dbMount(). And in dbNextAG(), a check for the case where agpref is greater than bmp->db_numag should be added, so an out-of-bounds exception should be prevented. Additionally, a check for the case where agno is greater or same than MAXAG should be added in diAlloc() to prevent out-of-bounds. • https://git.kernel.org/stable/c/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 https://git.kernel.org/stable/c/0338e66cba272351ca9d7d03f3628e390e70963b https://git.kernel.org/stable/c/ead82533278502428883085a787d5a00f15e5eb9 https://git.kernel.org/stable/c/6ce8b6ab44a8b5918c0ee373d4ad19d19017931b https://git.kernel.org/stable/c/c1ba4b8ca799ff1d99d01f37d7ccb7d5ba5533d2 https://git.kernel.org/stable/c/128d5cfdcf844cb690c9295a3a1c1114c21fc15a https://git.kernel.org/stable/c/96855f40e152989c9e7c20c4691ace5581098acc https://git.kernel.org/stable/c/e63866a475562810500ea7f784099bfe3 •