kernel fuzz测试出现 use-after-free Read in tasklet_action_common' bug.相应详细日志如下: Syzkaller hit 'KASAN: use-after-free Read in tasklet_action_common' bug. === BUG: KASAN: use-after-free in tasklet_action_common.isra.0+0x88/0x1a8 Read of size 8 at addr ffffd649cd1ac6d0 by t...
Linux kernel是开源操作系统Linux所使用的内核。在Linux 内核的 net/sched/cls_route.c 实现的 route4_change 中发现了一个存在 use-after-free 缺陷漏洞,该漏洞源于释放后重用,本地攻击者利用该漏洞会导致系统崩溃,可能会造成本地特权升级问题。 公开时间:2022/09/22 CVE编号:CVE-2022-2588 漏洞类型:UAF 漏洞...
[RHEL8] Kernel crashes due to an invalid freelist pointer caused by a possible kmalloc-8k slab corruption / use-after-free Solution Verified- UpdatedJune 14 2024 at 12:33 AM- English Issue Kernel crashes due to an invalid freelist pointer caused by kmalloc-8k slab corruption....
Q) What is a "Use after free" and how can it be exploited ? A) The kernel uses reference counters to keep track of how many different parts of the code are using a certain kernel object. In this case, it would be a user created keyring object. When the counter is set to zero,...
如果你是一个pwn选手,那么肯定很清楚UAF的原理,简单的说,Use After Free 就是其字面所表达的意思,当一个内存块被释放之后再次被使用。但是其实这里有以下几种情况: 内存块被释放后,其对应的指针被设置为 NULL , 然后再次使用,自然程序会崩溃。 内存块被释放后,其对应的指针没有被设置为 NULL ,然后在它下一次...
use_after_free = 4, vmalloc_out_of_bounds = 5, alloca_out_of_bounds = 6, }; static void kmalloc_oob_right(size_t size, int write_offset) { char *ptr; ptr = kmalloc(size, GFP_KERNEL); pr_info("%s %llx\n", __func__, (unsigned long long)ptr); ...
slub debug是一个debug集,聚焦于kmem_cache分配机制的slub内存(比如kmalloc),这部分内存在内核中使用最频繁,slub debug其中有相当部分是用来处理内存踩踏,内存use after free 等异常的,由于这部分的检测效果不如kasan(调试时slub前后填充不同的flag,在分配和释放时做检查,存在发现问题不及时的问题), 本文就不介绍了...
kernel contained use-after-free vulnerabilities. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4128)It was discovered that the Siano USB MDTV receiver device driver in the Linux kernel did not properly handle device in...
以上为各修改文件匹配的推荐Committer序列,需各模块评审通过后方可合入。 表态 回复 openeuler-ci-bot 成员 2024年12月17日 Check NameCheck ResultCheck Details checkpatch SUCCESS#21261 checkformat SUCCESS checkdepend SUCCESS 表态 回复 openeuler-ci-bot 移除了 ci_processing 标签 2024年12月17日 openeule...
after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-35824)It was discovered that the Renesas USB controller driver in the Linux kernel contained a race condition during device removal, ...