CVE-2026-23183

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