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CVE-2022-49395

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: um: Fix out-of-bounds read in LDT setup syscall_stub_data() expects the data_count parameter to be the number of longs, not bytes.

Published Feb 26, 2025CWE-125EPSS 0.29%

Overview

CVE-2022-49395 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

um: Fix out-of-bounds read in LDT setup

syscall_stub_data() expects the data_count parameter to be the number of

longs, not bytes.

==================================================================

BUG: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0

Read of size 128 at addr 000000006411f6f0 by task swapper/1

CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18

Call Trace:

show_stack.cold+0x166/0x2a7

__dump_stack+0x3a/0x43

dump_stack_lvl+0x1f/0x27

print_report.cold+0xdb/0xf81

kasan_report+0x119/0x1f0

kasan_check_range+0x3a3/0x440

memcpy+0x52/0x140

syscall_stub_data+0x70/0xe0

write_ldt_entry+0xac/0x190

init_new_ldt+0x515/0x960

init_new_context+0x2c4/0x4d0

mm_init.constprop.0+0x5ed/0x760

mm_alloc+0x118/0x170

0x60033f48

do_one_initcall+0x1d7/0x860

0x60003e7b

kernel_init+0x6e/0x3d4

new_thread_handler+0x1e7/0x2c0

The buggy address belongs to stack of task swapper/1

a

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/10995a382271254bd276627ec74136da4a23c4a6Refgit.kernel.org/stable/c/24ca648bf5f72ed8878cf09b5d4431935779681eRefgit.kernel.org/stable/c/2a4a62a14be1947fa945c5c11ebf67326381a568Refgit.kernel.org/stable/c/3549ab4b962cf619e8c55484a0d870a34b3f845fRefgit.kernel.org/stable/c/668ca34a428d6ffc0f99a1a6a9b661a288d4183bRefgit.kernel.org/stable/c/91e5ba2af2d729d5126aefd5aa3eadc69b8426e5Refgit.kernel.org/stable/c/9caad70819aef3431abaf73ba5163b55b161aba0Refgit.kernel.org/stable/c/cf0dabc37446c5ee538ae7b4c467ab0e53fa5463Refgit.kernel.org/stable/c/ef1dc929a1e5fa1b2d842256db9fb8710d3be910

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49395?

CVE-2022-49395 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2022-49395?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49395?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49395?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49395 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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