CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52572 – cifs: Fix UAF in cifs_demultiplex_thread()
https://notcve.org/view.php?id=CVE-2023-52572
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix UAF in cifs_demultiplex_thread() There is a UAF when xfstests on cifs: BUG: KASAN: use-after-free in smb2_is_network_name_deleted+0x27/0x160 Read of size 4 at addr ffff88810103fc08 by task cifsd/923 CPU: 1 PID: 923 Comm: cifsd Not tainted 6.1.0-rc4+ #45 ... Call Trace: <TASK> dump_stack_lvl+0x34/0x44 print_report+0x171/0x472 kasan_report+0xad/0x130 kasan_check_range+0x145/0x1a0 smb2_is_network_name_deleted+0x27/0x160 cifs_demultiplex_thread.cold+0x172/0x5a4 kthread+0x165/0x1a0 ret_from_fork+0x1f/0x30 </TASK> Allocated by task 923: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_slab_alloc+0x54/0x60 kmem_cache_alloc+0x147/0x320 mempool_alloc+0xe1/0x260 cifs_small_buf_get+0x24/0x60 allocate_buffers+0xa1/0x1c0 cifs_demultiplex_thread+0x199/0x10d0 kthread+0x165/0x1a0 ret_from_fork+0x1f/0x30 Freed by task 921: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x40 ____kasan_slab_free+0x143/0x1b0 kmem_cache_free+0xe3/0x4d0 cifs_small_buf_release+0x29/0x90 SMB2_negotiate+0x8b7/0x1c60 smb2_negotiate+0x51/0x70 cifs_negotiate_protocol+0xf0/0x160 cifs_get_smb_ses+0x5fa/0x13c0 mount_get_conns+0x7a/0x750 cifs_mount+0x103/0xd00 cifs_smb3_do_mount+0x1dd/0xcb0 smb3_get_tree+0x1d5/0x300 vfs_get_tree+0x41/0xf0 path_mount+0x9b3/0xdd0 __x64_sys_mount+0x190/0x1d0 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The UAF is because: mount(pid: 921) | cifsd(pid: 923) -------------------------------|------------------------------- | cifs_demultiplex_thread SMB2_negotiate | cifs_send_recv | compound_send_recv | smb_send_rqst | wait_for_response | wait_event_state [1] | | standard_receive3 | cifs_handle_standard | handle_mid | mid->resp_buf = buf; [2] | dequeue_mid [3] KILL the process [4] | resp_iov[i].iov_base = buf | free_rsp_buf [5] | | is_network_name_deleted [6] | callback 1. After send request to server, wait the response until mid->mid_state != SUBMITTED; 2. Receive response from server, and set it to mid; 3. Set the mid state to RECEIVED; 4. • https://git.kernel.org/stable/c/ec637e3ffb6b978143652477c7c5f96c9519b691 https://git.kernel.org/stable/c/908b3b5e97d25e879de3d1f172a255665491c2c3 https://git.kernel.org/stable/c/76569e3819e0bb59fc19b1b8688b017e627c268a https://git.kernel.org/stable/c/d527f51331cace562393a8038d870b3e9916686f •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52569 – btrfs: remove BUG() after failure to insert delayed dir index item
https://notcve.org/view.php?id=CVE-2023-52569
In the Linux kernel, the following vulnerability has been resolved: btrfs: remove BUG() after failure to insert delayed dir index item Instead of calling BUG() when we fail to insert a delayed dir index item into the delayed node's tree, we can just release all the resources we have allocated/acquired before and return the error to the caller. This is fine because all existing call chains undo anything they have done before calling btrfs_insert_delayed_dir_index() or BUG_ON (when creating pending snapshots in the transaction commit path). So remove the BUG() call and do proper error handling. This relates to a syzbot report linked below, but does not fix it because it only prevents hitting a BUG(), it does not fix the issue where somehow we attempt to use twice the same index number for different index items. • https://git.kernel.org/stable/c/39c4a9522db0072570d602e9b365119e17fb9f4f https://git.kernel.org/stable/c/d10fd53393cc5de4b9cf1a4b8f9984f0a037aa51 https://git.kernel.org/stable/c/2c58c3931ede7cd08cbecf1f1a4acaf0a04a41a9 •
CVSS: -EPSS: 0%CPEs: 10EXPL: 0CVE-2023-52567 – serial: 8250_port: Check IRQ data before use
https://notcve.org/view.php?id=CVE-2023-52567
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_port: Check IRQ data before use In case the leaf driver wants to use IRQ polling (irq = 0) and IIR register shows that an interrupt happened in the 8250 hardware the IRQ data can be NULL. In such a case we need to skip the wake event as we came to this path from the timer interrupt and quite likely system is already awake. Without this fix we have got an Oops: serial8250: ttyS0 at I/O 0x3f8 (irq = 0, base_baud = 115200) is a 16550A ... BUG: kernel NULL pointer dereference, address: 0000000000000010 RIP: 0010:serial8250_handle_irq+0x7c/0x240 Call Trace: ? serial8250_handle_irq+0x7c/0x240 ? __pfx_serial8250_timeout+0x10/0x10 • https://git.kernel.org/stable/c/edfe57aedff4ecf3606533aabf8ecf7676c3c5d9 https://git.kernel.org/stable/c/0bd49a043c7984c93c2a0af41222fb71c3986a4e https://git.kernel.org/stable/c/572d48361aa0a6e6f16c1470e5407de183493d0c https://git.kernel.org/stable/c/d5d628fea5f6181809a9d61b04de6ade53277684 https://git.kernel.org/stable/c/424cf29296354d7b9c6c038aaa7bb71782100851 https://git.kernel.org/stable/c/727e92fe13e81c6088a88d83e466b2b1b553c4e3 https://git.kernel.org/stable/c/0ba9e3a13c6adfa99e32b2576d20820ab10ad48a https://git.kernel.org/stable/c/d7c6aa39eb041e2a6a53106104200d11e •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2023-52566 – nilfs2: fix potential use after free in nilfs_gccache_submit_read_data()
https://notcve.org/view.php?id=CVE-2023-52566
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential use after free in nilfs_gccache_submit_read_data() In nilfs_gccache_submit_read_data(), brelse(bh) is called to drop the reference count of bh when the call to nilfs_dat_translate() fails. If the reference count hits 0 and its owner page gets unlocked, bh may be freed. However, bh->b_page is dereferenced to put the page after that, which may result in a use-after-free bug. This patch moves the release operation after unlocking and putting the page. NOTE: The function in question is only called in GC, and in combination with current userland tools, address translation using DAT does not occur in that function, so the code path that causes this issue will not be executed. However, it is possible to run that code path by intentionally modifying the userland GC library or by calling the GC ioctl directly. [konishi.ryusuke@gmail.com: NOTE added to the commit log] • https://git.kernel.org/stable/c/a3d93f709e893187d301aa5458b2248db9f22bd1 https://git.kernel.org/stable/c/fb1084e63ee56958b0a56e17a50a4fd86445b9c1 https://git.kernel.org/stable/c/bb61224f6abc8e71bfdf06d7c984e23460875f5b https://git.kernel.org/stable/c/193b5a1c6c67c36b430989dc063fe7ea4e200a33 https://git.kernel.org/stable/c/7130a87ca32396eb9bf48b71a2d42259ae44c6c7 https://git.kernel.org/stable/c/3936e8714907cd55e37c7cc50e50229e4a9042e8 https://git.kernel.org/stable/c/980663f1d189eedafd18d80053d9cf3e2ceb5c8c https://git.kernel.org/stable/c/28df4646ad8b433340772edc90ca709cd • CWE-416: Use After Free •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2023-52564 – Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"
https://notcve.org/view.php?id=CVE-2023-52564
In the Linux kernel, the following vulnerability has been resolved: Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux" This reverts commit 9b9c8195f3f0d74a826077fc1c01b9ee74907239. The commit above is reverted as it did not solve the original issue. gsm_cleanup_mux() tries to free up the virtual ttys by calling gsm_dlci_release() for each available DLCI. There, dlci_put() is called to decrease the reference counter for the DLCI via tty_port_put() which finally calls gsm_dlci_free(). This already clears the pointer which is being checked in gsm_cleanup_mux() before calling gsm_dlci_release(). Therefore, it is not necessary to clear this pointer in gsm_cleanup_mux() as done in the reverted commit. The commit introduces a null pointer dereference: <TASK> ? __die+0x1f/0x70 ? • https://git.kernel.org/stable/c/8fc0eabaa73bbd9bd705577071564616da5c8c61 https://git.kernel.org/stable/c/5138c228311a863c3cf937b94a3ab4c87f1f70c4 https://git.kernel.org/stable/c/9615ca54bc138e35353a001e8b5d4824dce72188 https://git.kernel.org/stable/c/9b9c8195f3f0d74a826077fc1c01b9ee74907239 https://git.kernel.org/stable/c/74a8d6f50cc90ed0061997db51dfa81a62b0f835 https://git.kernel.org/stable/c/6d5c8862932d31a810b6545f7d69ecc124402c6e https://git.kernel.org/stable/c/a48d2bcd23f2c98d575bc2f9b7a3fbd16aeea9eb https://git.kernel.org/stable/c/c61d0b87a7028c2c10faffc524d748334 •