CVE-2026-31717
HighCVSS 8.8Summary
W jądrze Linuxa zidentyfikowano podatność w ksmbd, która nie weryfikuje, czy użytkownik próbujący ponownie połączyć się z trwałym uchwytem jest tym samym użytkownikiem, który pierwotnie otworzył plik. To umożliwia każdemu uwierzytelnionemu użytkownikowi przejęcie osieroconego trwałego uchwytu poprzez przewidywanie lub łamanie identyfikatora.
Risk Assessment
Podatność ta stwarza ryzyko przejęcia dostępu do plików przez nieautoryzowanych użytkowników, co może prowadzić do wycieku danych lub nieautoryzowanych modyfikacji. Organizacje powinny być świadome potencjalnych zagrożeń związanych z bezpieczeństwem danych.
Recommendation
Zaleca się aktualizację jądra Linuxa do najnowszej wersji, która zawiera poprawki dla tej podatności. Dodatkowo, warto wdrożyć monitorowanie i audyt dostępu do plików, aby zminimalizować ryzyko nieautoryzowanego dostępu.
Related vulnerabilities
- CVE-2026-72710Critical
SPIP before 4.4.18 contains a remote code execution vulnerability in the editer_objet action where the arg parameter resolves SQL table names without enforcing an editable columns allowlist. Attackers with a valid nonce can inject attacker-controlled rows into the spip_jobs table, and by supplying arg=job/0 with crafted fonction and args values, these are later unserialized and executed when the cron job queue is drained.
- CVE-2026-72709Critical
SPIP before 4.4.18 contains a missing authorization vulnerability in the administrative action endpoints under ecrire/action/ that allows unauthenticated attackers to perform privileged actions by supplying a valid HMAC-SHA256 nonce without any server-side permission check via autoriser(). Attackers can obtain a valid nonce, compute it for any action as the anonymous user, and invoke the editer_auteur action directly over HTTP to reset the password of any user account, including the administrator.
- CVE-2026-54047Critical
Laci Synchroni is a decentralized mod and appearance sync server and plugin for Dalamud. Versions of the backend prior to 1.2.3 have an improper authentication vulnerability in the OAuth2 login flow, relying on client-side state by trusting the UID field inside the Authentications object of a user's local config.json file. By manually editing this file before logging in, a user can supply an arbitrary UID, and because the server fails to validate that the authenticated OAuth2 identity matches the requested UID, an attacker can fully impersonate any target user and perform actions on their behalf.
- CVE-2026-3869Critical
CWE-303: Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.
- CVE-2026-89010Critical
WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922 contain an unauthenticated OS command injection vulnerability that allows remote attackers to execute arbitrary commands as root by sending crafted filenames to the sync_server daemon on TCP port 13136. The daemon interpolates attacker-controlled filename input containing shell metacharacters into a shell command string via sprintf() and passes it to system() without sanitization, enabling root-level command execution.
- CVE-2026-89009Critical
WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922 contain an unauthenticated arbitrary file write vulnerability that allows remote attackers to overwrite any file on the device by sending a crafted payload to the sync_server daemon on TCP port 13136. The daemon, which runs as root and requires no authentication, accepts a 100-byte filename field in its protocol header without path canonicalization, allowing attackers to supply an absolute path and write arbitrary content to overwrite startup scripts or credential stores to achieve persistent system compromise.
- CVE-2026-87988Critical
An arbitrary file access vulnerability in Mistral Vibe allows an attacker to bypass workspace restrictions through commands classified as unconditionally allowed. Missing path validation for these commands enables access to files outside the active workspace without user approval.
- CVE-2026-87987Critical
An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using environment variable assignments preceding allowlisted commands. These assignments are excluded from inspection, enabling attacker-controlled environment variables to cause arbitrary code execution without user approval.
- CVE-2026-87986Critical
An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using shell constructs its parser cannot interpret. Unparsed portions are omitted from inspection, enabling embedded commands to execute on the user's system without approval.
- CVE-2026-87985Critical
An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using ANSI-C quoted arguments. These arguments are not properly inspected, enabling a crafted allowlisted command to execute arbitrary code on the user's system without approval.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate owner of durable handle on reconnect Currently, ksmbd does not verify if the user attempting to reconnect to a durable handle is the same user who originally opened the file. This allows any authenticated user to hijack an orphaned durable handle by predicting or brute-forcing the persistent ID. According to MS-SMB2, the server MUST verify that the SecurityContext of the reconnect request matches the SecurityContext associated with the existing open. Add a durable_owner structure to ksmbd_file to store the original opener's UID, GID, and account name. and catpure the owner information when a file handle becomes orphaned. and implementing ksmbd_vfs_compare_durable_owner() to validate the identity of the requester during SMB2_CREATE (DHnC).

