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| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2026-23192 | 1 Linux | 1 Linux Kernel | 2026-04-16 | 7.8 High |
| In the Linux kernel, the following vulnerability has been resolved: linkwatch: use __dev_put() in callers to prevent UAF After linkwatch_do_dev() calls __dev_put() to release the linkwatch reference, the device refcount may drop to 1. At this point, netdev_run_todo() can proceed (since linkwatch_sync_dev() sees an empty list and returns without blocking), wait for the refcount to become 1 via netdev_wait_allrefs_any(), and then free the device via kobject_put(). This creates a use-after-free when __linkwatch_run_queue() tries to call netdev_unlock_ops() on the already-freed device. Note that adding netdev_lock_ops()/netdev_unlock_ops() pair in netdev_run_todo() before kobject_put() would not work, because netdev_lock_ops() is conditional - it only locks when netdev_need_ops_lock() returns true. If the device doesn't require ops_lock, linkwatch won't hold any lock, and netdev_run_todo() acquiring the lock won't provide synchronization. Fix this by moving __dev_put() from linkwatch_do_dev() to its callers. The device reference logically pairs with de-listing the device, so it's reasonable for the caller that did the de-listing to release it. This allows placing __dev_put() after all device accesses are complete, preventing UAF. The bug can be reproduced by adding mdelay(2000) after linkwatch_do_dev() in __linkwatch_run_queue(), then running: ip tuntap add mode tun name tun_test ip link set tun_test up ip link set tun_test carrier off ip link set tun_test carrier on sleep 0.5 ip tuntap del mode tun name tun_test KASAN report: ================================================================== BUG: KASAN: use-after-free in netdev_need_ops_lock include/net/netdev_lock.h:33 [inline] BUG: KASAN: use-after-free in netdev_unlock_ops include/net/netdev_lock.h:47 [inline] BUG: KASAN: use-after-free in __linkwatch_run_queue+0x865/0x8a0 net/core/link_watch.c:245 Read of size 8 at addr ffff88804de5c008 by task kworker/u32:10/8123 CPU: 0 UID: 0 PID: 8123 Comm: kworker/u32:10 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events_unbound linkwatch_event Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x156/0x4c9 mm/kasan/report.c:482 kasan_report+0xdf/0x1a0 mm/kasan/report.c:595 netdev_need_ops_lock include/net/netdev_lock.h:33 [inline] netdev_unlock_ops include/net/netdev_lock.h:47 [inline] __linkwatch_run_queue+0x865/0x8a0 net/core/link_watch.c:245 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304 process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3421 kthread+0x3b3/0x730 kernel/kthread.c:463 ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 </TASK> ================================================================== | ||||
| CVE-2026-23195 | 1 Linux | 1 Linux Kernel | 2026-04-16 | 7 High |
| In the Linux kernel, the following vulnerability has been resolved: cgroup/dmem: avoid pool UAF An UAF issue was observed: BUG: KASAN: slab-use-after-free in page_counter_uncharge+0x65/0x150 Write of size 8 at addr ffff888106715440 by task insmod/527 CPU: 4 UID: 0 PID: 527 Comm: insmod 6.19.0-rc7-next-20260129+ #11 Tainted: [O]=OOT_MODULE Call Trace: <TASK> dump_stack_lvl+0x82/0xd0 kasan_report+0xca/0x100 kasan_check_range+0x39/0x1c0 page_counter_uncharge+0x65/0x150 dmem_cgroup_uncharge+0x1f/0x260 Allocated by task 527: Freed by task 0: The buggy address belongs to the object at ffff888106715400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes inside of freed 512-byte region [ffff888106715400, ffff888106715600) The buggy address belongs to the physical page: Memory state around the buggy address: ffff888106715300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888106715380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888106715400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888106715480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888106715500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb The issue occurs because a pool can still be held by a caller after its associated memory region is unregistered. The current implementation frees the pool even if users still hold references to it (e.g., before uncharge operations complete). This patch adds a reference counter to each pool, ensuring that a pool is only freed when its reference count drops to zero. | ||||
| CVE-2004-0077 | 4 Linux, Netwosix, Redhat and 1 more | 9 Linux Kernel, Netwosix Linux, Bigmem Kernel and 6 more | 2026-04-16 | N/A |
| The do_mremap function for the mremap system call in Linux 2.2 to 2.2.25, 2.4 to 2.4.24, and 2.6 to 2.6.2, does not properly check the return value from the do_munmap function when the maximum number of VMA descriptors is exceeded, which allows local users to gain root privileges, a different vulnerability than CAN-2003-0985. | ||||
| CVE-2006-0558 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| perfmon (perfmon.c) in Linux kernel on IA64 architectures allows local users to cause a denial of service (crash) by interrupting a task while another process is accessing the mm_struct, which triggers a BUG_ON action in the put_page_testzero function. | ||||
| CVE-2003-0001 | 5 Freebsd, Linux, Microsoft and 2 more | 6 Freebsd, Linux Kernel, Windows 2000 and 3 more | 2026-04-16 | 5.3 Medium |
| Multiple ethernet Network Interface Card (NIC) device drivers do not pad frames with null bytes, which allows remote attackers to obtain information from previous packets or kernel memory by using malformed packets, as demonstrated by Etherleak. | ||||
| CVE-2005-0736 | 3 Conectiva, Linux, Redhat | 5 Linux, Linux Kernel, Enterprise Linux and 2 more | 2026-04-16 | N/A |
| Integer overflow in sys_epoll_wait in eventpoll.c for Linux kernel 2.6 to 2.6.11 allows local users to overwrite kernel memory via a large number of events. | ||||
| CVE-1999-0074 | 4 Freebsd, Linux, Microsoft and 1 more | 4 Freebsd, Linux Kernel, Windows Nt and 1 more | 2026-04-16 | N/A |
| Listening TCP ports are sequentially allocated, allowing spoofing attacks. | ||||
| CVE-2006-0744 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| Linux kernel before 2.6.16.5 does not properly handle uncanonical return addresses on Intel EM64T CPUs, which reports an exception in the SYSRET instead of the next instruction, which causes the kernel exception handler to run on the user stack with the wrong GS. | ||||
| CVE-2006-1056 | 3 Freebsd, Linux, Redhat | 3 Freebsd, Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| The Linux kernel before 2.6.16.9 and the FreeBSD kernel, when running on AMD64 and other 7th and 8th generation AuthenticAMD processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one process to determine portions of the state of floating point instructions of other processes, which can be leveraged to obtain sensitive information such as cryptographic keys. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels. | ||||
| CVE-2006-1242 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| The ip_push_pending_frames function in Linux 2.4.x and 2.6.x before 2.6.16 increments the IP ID field when sending a RST after receiving unsolicited TCP SYN-ACK packets, which allows remote attackers to conduct an Idle Scan (nmap -sI) attack, which bypasses intended protections against such attacks. | ||||
| CVE-2003-0127 | 2 Linux, Redhat | 3 Linux Kernel, Enterprise Linux, Linux | 2026-04-16 | N/A |
| The kernel module loader in Linux kernel 2.2.x before 2.2.25, and 2.4.x before 2.4.21, allows local users to gain root privileges by using ptrace to attach to a child process that is spawned by the kernel. | ||||
| CVE-2006-1528 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| Linux kernel before 2.6.13 allows local users to cause a denial of service (crash) via a dio transfer from the sg driver to memory mapped (mmap) IO space. | ||||
| CVE-1999-0431 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| Linux 2.2.3 and earlier allow a remote attacker to perform an IP fragmentation attack, causing a denial of service. | ||||
| CVE-2004-0497 | 7 Conectiva, Gentoo, Linux and 4 more | 9 Linux, Linux, Linux Kernel and 6 more | 2026-04-16 | N/A |
| Unknown vulnerability in Linux kernel 2.x may allow local users to modify the group ID of files, such as NFS exported files in kernel 2.4. | ||||
| CVE-2006-1860 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| lease_init in fs/locks.c in Linux kernel before 2.6.16.16 allows attackers to cause a denial of service (fcntl_setlease lockup) via actions that cause lease_init to free a lock that might not have been allocated on the stack. | ||||
| CVE-2006-1055 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| The fill_write_buffer function in sysfs/file.c in Linux kernel 2.6.12 up to versions before 2.6.17-rc1 does not zero terminate a buffer when a length of PAGE_SIZE or more is requested, which might allow local users to cause a denial of service (crash) by causing an out-of-bounds read. | ||||
| CVE-2006-3626 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| Race condition in Linux kernel 2.6.17.4 and earlier allows local users to gain root privileges by using prctl with PR_SET_DUMPABLE in a way that causes /proc/self/environ to become setuid root. | ||||
| CVE-2004-1235 | 7 Avaya, Conectiva, Linux and 4 more | 20 Converged Communications Server, Intuity Audix, Mn100 and 17 more | 2026-04-16 | N/A |
| Race condition in the (1) load_elf_library and (2) binfmt_aout function calls for uselib in Linux kernel 2.4 through 2.429-rc2 and 2.6 through 2.6.10 allows local users to execute arbitrary code by manipulating the VMA descriptor. | ||||
| CVE-2001-0851 | 4 Caldera, Linux, Redhat and 1 more | 8 Openlinux, Openlinux Edesktop, Openlinux Eserver and 5 more | 2026-04-16 | N/A |
| Linux kernel 2.0, 2.2 and 2.4 with syncookies enabled allows remote attackers to bypass firewall rules by brute force guessing the cookie. | ||||
| CVE-1999-0171 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| Denial of service in syslog by sending it a large number of superfluous messages. | ||||