Updated: 2026-02-08 03:23:54.899585
Description:
In the Linux kernel, the following vulnerability has been resolved: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN: shift-out-of-bounds in security/commoncap.c:1252:2 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c cap_task_prctl+0x561/0x6f0 security_task_prctl+0x5a/0xb0 __x64_sys_prctl+0x61/0x8f0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | HIGH | 7.1 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| CentOS 6 ELS | kernel | 2.6.32 | 7.1 | HIGH | Released | CLSA-2026:1768669128 | 2026-01-28 13:00:08 | |
| CentOS 7 ELS | kernel | 3.10.0 | 7.1 | HIGH | Released | CLSA-2025:1766617167 | 2026-01-12 18:12:54 | |
| CentOS 8.4 ELS | kernel | 4.18.0 | 7.1 | HIGH | Needs Triage | 2026-01-17 01:40:56 | ||
| CentOS 8.5 ELS | kernel | 4.18.0 | 7.1 | HIGH | Released | CLSA-2026:1768775579 | 2026-01-19 10:24:49 | |
| Oracle Linux 6 ELS | kernel | 2.6.32 | 7.1 | HIGH | Released | CLSA-2026:1769610819 | 2026-01-28 21:23:48 | |
| Oracle Linux 7 ELS | kernel | 3.10.0 | 7.1 | HIGH | Released | CLSA-2025:1766599987 | 2025-12-25 14:33:44 | |
| RHEL 7 ELS | kernel | 3.10.0 | 7.1 | HIGH | Released | CLSA-2025:1766600619 | 2025-12-25 14:33:26 | |
| Ubuntu 16.04 ELS | linux-hwe | 4.15.0 | 7.1 | HIGH | Already Fixed | 2025-11-28 16:25:47 | ||
| Ubuntu 16.04 ELS | linux | 4.4.0 | 7.1 | HIGH | In Testing | 2025-11-28 16:21:48 |