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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-2004-0447 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| Unknown vulnerability in Linux before 2.4.26 for IA64 allows local users to cause a denial of service, with unknown impact. NOTE: due to a typo, this issue was accidentally assigned CVE-2004-0477. This is the proper candidate to use for the Linux local DoS. | ||||
| CVE-2004-0186 | 2 Linux, Samba | 2 Linux Kernel, Samba | 2026-04-16 | N/A |
| smbmnt in Samba 2.x and 3.x on Linux 2.6, when installed setuid, allows local users to gain root privileges by mounting a Samba share that contains a setuid root program, whose setuid attributes are not cleared when the share is mounted. | ||||
| CVE-2004-0075 | 2 Linux, Redhat | 3 Linux Kernel, Enterprise Linux, Linux | 2026-04-16 | N/A |
| The Vicam USB driver in Linux before 2.4.25 does not use the copy_from_user function when copying data from userspace to kernel space, which crosses security boundaries and allows local users to cause a denial of service. | ||||
| CVE-1999-0513 | 7 Digital, Freebsd, Hp and 4 more | 8 Unix, Freebsd, Hp-ux and 5 more | 2026-04-16 | N/A |
| ICMP messages to broadcast addresses are allowed, allowing for a Smurf attack that can cause a denial of service. | ||||
| CVE-2003-1430 | 3 Epic Games, Linux, Microsoft | 3 Unreal Engine, Linux Kernel, All Windows | 2026-04-16 | N/A |
| Directory traversal vulnerability in Unreal Tournament Server 436 and earlier allows remote attackers to access known files via a ".." (dot dot) in an unreal:// URL. | ||||
| CVE-2003-1428 | 2 Bharat Mediratta, Linux | 2 Gallery, Linux Kernel | 2026-04-16 | N/A |
| Gallery 1.3.3 creates directories with insecure permissions, which allows local users to read, modify, or delete photos. | ||||
| CVE-2003-1332 | 3 Linux, Redhat, Samba | 3 Linux Kernel, Enterprise Linux, Samba | 2026-04-16 | N/A |
| Stack-based buffer overflow in the reply_nttrans function in Samba 2.2.7a and earlier allows remote attackers to execute arbitrary code via a crafted request, a different vulnerability than CVE-2003-0201. | ||||
| CVE-2005-1369 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| The (1) it87 and (2) via686a drivers in I2C for Linux 2.6.x before 2.6.11.8, and 2.6.12 before 2.6.12-rc2, create the sysfs "alarms" file with write permissions, which allows local users to cause a denial of service (CPU consumption) by attempting to write to the file, which does not have an associated store function. | ||||
| CVE-2003-0986 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| Various routines for the ppc64 architecture on Linux kernel 2.6 prior to 2.6.2 and 2.4 prior to 2.4.24 do not use the copy_from_user function when copying data from userspace to kernelspace, which crosses security boundaries and allows local users to cause a denial of service. | ||||
| CVE-2003-0985 | 2 Linux, Redhat | 3 Linux Kernel, Enterprise Linux, Linux | 2026-04-16 | N/A |
| The mremap system call (do_mremap) in Linux kernel 2.4.x before 2.4.21, and possibly other versions before 2.4.24, does not properly perform bounds checks, which allows local users to cause a denial of service and possibly gain privileges by causing a remapping of a virtual memory area (VMA) to create a zero length VMA, a different vulnerability than CAN-2004-0077. | ||||
| CVE-2003-0501 | 2 Linux, Redhat | 3 Linux Kernel, Enterprise Linux, Linux | 2026-04-16 | N/A |
| The /proc filesystem in Linux allows local users to obtain sensitive information by opening various entries in /proc/self before executing a setuid program, which causes the program to fail to change the ownership and permissions of those entries. | ||||
| CVE-2003-0418 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| The Linux 2.0 kernel IP stack does not properly calculate the size of an ICMP citation, which causes it to include portions of unauthorized memory in ICMP error responses. | ||||
| CVE-2005-2098 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| The KEYCTL_JOIN_SESSION_KEYRING operation in the Linux kernel before 2.6.12.5 contains an error path that does not properly release the session management semaphore, which allows local users or remote attackers to cause a denial of service (semaphore hang) via a new session keyring (1) with an empty name string, (2) with a long name string, (3) with the key quota reached, or (4) ENOMEM. | ||||
| 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-2005-2099 | 2 Linux, Redhat | 2 Linux Kernel, Enterprise Linux | 2026-04-16 | N/A |
| The Linux kernel before 2.6.12.5 does not properly destroy a keyring that is not instantiated properly, which allows local users or remote attackers to cause a denial of service (kernel oops) via a keyring with a payload that is not empty, which causes the creation to fail, leading to a null dereference in the keyring destructor. | ||||
| CVE-2002-1976 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| ifconfig, when used on the Linux kernel 2.2 and later, does not report when the network interface is in promiscuous mode if it was put in promiscuous mode using PACKET_MR_PROMISC, which could allow attackers to sniff the network without detection, as demonstrated using libpcap. | ||||
| CVE-2002-1380 | 2 Linux, Redhat | 2 Linux Kernel, Linux | 2026-04-16 | N/A |
| Linux kernel 2.2.x allows local users to cause a denial of service (crash) by using the mmap() function with a PROT_READ parameter to access non-readable memory pages through the /proc/pid/mem interface. | ||||
| CVE-2002-0570 | 1 Linux | 1 Linux Kernel | 2026-04-16 | N/A |
| The encrypted loop device in Linux kernel 2.4.10 and earlier does not authenticate the entity that is encrypting data, which allows local users to modify encrypted data without knowing the key. | ||||