CVE-2026-23195
HighSummary
W jądrze systemu Linux zidentyfikowano i naprawiono podatność typu use-after-free (UAF) w module cgroup/dmem. Problem ten występuje w funkcji page_counter_uncharge, co może prowadzić do nieprzewidzianego zachowania systemu.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do destabilizacji systemu, potencjalnie umożliwiając atakującym wykonanie nieautoryzowanego kodu lub uzyskanie dostępu do pamięci, co zagraża integralności i poufności danych.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, w której ta podatność została naprawiona, aby zminimalizować ryzyko związane z jej wykorzystaniem.
Related vulnerabilities
- CVE-2026-93467Critical
The OAKlouds developed by HGiga has an Insecure Deserialization vulnerability. Unauthenticated remote attackers can execute arbitrary code on the server by sending maliciously crafted serialized content.
- CVE-2026-85878Critical
Improper authorization in Azure Database for PostgreSQL allows an authorized attacker to elevate privileges over a network.
- CVE-2026-69843Critical
Authentication bypass by spoofing in Microsoft Fabric allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-62874Critical
Insufficient verification of data authenticity in Azure Billing allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-87886HighActively exploited
The vulnerability is a local privilege escalation due to insecure file permissions. It affects Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, and Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238.
- CVE-2026-87701Critical
Improper neutralization of special elements in output used by a downstream component ('injection') in Azure Cosmos DB allows an authorized attacker to elevate privileges over a network.
- CVE-2026-85889Critical
Missing authentication for a critical function in Azure AI Foundry allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-85885Critical
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.
- CVE-2026-83944Critical
Improper access control in Azure Logic Apps allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-77903Critical
Authentication bypass by spoofing in Microsoft Dataverse allows an unauthorized attacker to elevate privileges over a network.
Original NVD description (English source)
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 >ffff888