# CVE-2026-23183: linux: In the Linux kernel, the following vulnerability has been resolved:  cgroup/dmem: fix NULL pointer dereference when s...

CVE-2026-23183 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23183 (version 6.18.10-1), released February 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23183
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 14, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  cgroup/dmem: fix NULL pointer dereference when setting max  An issue was triggered:   BUG: kernel NULL pointer dereference, address: 0000000000000000  #PF: supervisor read access in kernel mode  #PF: error_code(0x0000) - not-present page  PGD 0 P4D 0  Oops: Oops: 0000 [#1] SMP NOPTI  CPU: 15 UID: 0 PID: 658 Comm: bash Tainted: 6.19.0-rc6-next-2026012  Tainted: [O]=OOT_MODULE  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),  RIP: 0010:strcmp+0x10/0x30  RSP: 0018:ffffc900017f7dc0 EFLAGS: 00000246  RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888107cd4358  RDX: 0000000019f73907 RSI: ffffffff82cc381a RDI: 0000000000000000  RBP: ffff8881016bef0d R08: 000000006c0e7145 R09: 0000000056c0e714  R10: 0000000000000001 R11: ffff888107cd4358 R12: 0007ffffffffffff  R13: ffff888101399200 R14: ffff888100fcb360 R15: 0007ffffffffffff  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  CR2: 0000000000000000 CR3: 0000000105c79000 CR4: 00000000000006f0  Call Trace:   <TASK>   dmemcg_limit_write.constprop.0+0x16d/0x390   ? __pfx_set_resource_max+0x10/0x10   kernfs_fop_write_iter+0x14e/0x200   vfs_write+0x367/0x510   ksys_write+0x66/0xe0   do_syscall_64+0x6b/0x390   entry_SYSCALL_64_after_hwframe+0x76/0x7e  RIP: 0033:0x7f42697e1887  It was trriggered setting max without limitation, the command is like: "echo test/region0 > dmem.max". To fix this issue, add check whether options is valid after parsing the region_name.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.10-1 | [DEBIAN-CVE-2026-23183](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23183.md) | Feb 14, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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