# CVE-2022-49870: linux: In the Linux kernel, the following vulnerability has been resolved:  capabilities: fix undefined behavior in bit shif...

CVE-2022-49870 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49870, released May 1, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49870
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## 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>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49870](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49870.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49870](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49870.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49870](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49870.md) | May 1, 2025 |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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