CVE-2026-98840
Description détaillée
In the Linux kernel, the following vulnerability has been resolved: vc_screen: reload vc pointer before if (ret) in vcs_write() to avoid UAF The reload of 'vc' added by commit 8fb9ea65c9d1 ("vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF") sits after the 'if (ret)' block, so the copy-failure break path exits the loop without reloading vc. If the vc was kfree()'d via vc_port_destruct during the unlocked copy_from_user() window, the post-loop 'if (written && vc) vcs_scr_updated(vc)' is reached with a stale non-NULL vc. The '&& vc' guard from commit a287620312dc ("vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write") only handles the NULL case, not this stale-non-NULL case; vcs_notifier() then reads param->vc->vc_num from freed memory: BUG: KASAN: slab-use-after-free in vcs_notifier+0x7c/0xd0 Read of size 2 at addr ffff888007149190 Call Trace: vcs_notifier+0x7c/0xd0 atomic_notifier_call_chain+0x70/0xa0 vcs_scr_updated+0x77/0xa0 vcs_write+0x71b/0x7e0 Allocated by task: vc_allocate -> con_install -> tty_open Freed by task: kfree <- vt_ioctl (VT_DISALLOCATE -> vc_port_destruct) Move the reload to immediately after console_lock(), before 'if (ret)', so every break path below passes a fresh vc to the post-loop vcs_scr_updated().
Références et Patchs
Dernières Vulnérabilités
CVE-2024-4457
The Management Console fails to properly validate input related to the configuration of JDBC user stores. This weakness allows an attacker to supply specially crafted input that can lead to the execution of arbitrary code on the affected server. Successful exploitation of this vulnerability enables an attacker to execute arbitrary code on the server with the privileges of the WSO2 product. This could lead to a full compromise of the system.
CVE-2026-111993
A flaw has been found in Soarkey StudentManagement up to e08f7f1d5015af407aa4cca0ada3dea189b4937e. Impacted is the function UserDao.login of the file code/src/service/AdminDao.java. This manipulation of the argument Password causes cleartext storage of sensitive information. The attack is restricted to local execution. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
CVE-2026-111992
A vulnerability was detected in itsmeravitejak Online-Examination-System up to e6208e630b14657999bbfe4c9912302d2a1e2449. This issue affects the function Exam::startExam of the file exam.php of the component Exam Module. The manipulation of the argument topicid results in sql injection. The attack can be executed remotely. The exploit is now public and may be used. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The project was informed of the problem early through an issue report but has not responded yet.