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CVE-2025-40082

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: hfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc() BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0xa71/0xb90 fs/hfsp…

Published Oct 28, 2025CWE-125EPSS 0.19%

Overview

CVE-2025-40082 is a high-severity vulnerability. It was published on October 28, 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:

hfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc()

BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0xa71/0xb90 fs/hfsplus/unicode.c:186

Read of size 2 at addr ffff8880289ef218 by task syz.6.248/14290

CPU: 0 UID: 0 PID: 14290 Comm: syz.6.248 Not tainted 6.16.4 #1 PREEMPT(full)

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014

Call Trace:

<TASK>

__dump_stack lib/dump_stack.c:94 [inline]

dump_stack_lvl+0x116/0x1b0 lib/dump_stack.c:120

print_address_description mm/kasan/report.c:378 [inline]

print_report+0xca/0x5f0 mm/kasan/report.c:482

kasan_report+0xca/0x100 mm/kasan/report.c:595

hfsplus_uni2asc+0xa71/0xb90 fs/hfsplus/unicode.c:186

hfsplus_listxattr+0x5b6/0xbd0 fs/hfsplus/xattr.c:738

vfs_listxattr+0xbe/0x140 fs/xattr.c:493

listxattr+0xee/0x190 fs/xattr.c:924

filename_listxattr fs/xattr.c:958 [inline]

path_listxattrat+0x143/0x360 fs/xattr.c:988

do_syscall_x64 arch/x86

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/343fe375a8dd6ee51a193a1c233b999f5ea4d479Refgit.kernel.org/stable/c/5b5228964619b180f366940505b77255b1a03929Refgit.kernel.org/stable/c/782acde47e127c98a113726e2ff8024bd65c0454Refgit.kernel.org/stable/c/857aefc70d4ae3b9bf1ae67434d27d0f79f80c9eRefgit.kernel.org/stable/c/bea3e1d4467bcf292c8e54f080353d556d355e26Refgit.kernel.org/stable/c/c3db89ea1ed3d540eebe8f3c36e806fb75ee4a1e

How CyberStrike helps

Frequently asked questions

What is CVE-2025-40082?

CVE-2025-40082 is a high-severity vulnerability. It was published on October 28, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2025-40082?

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-2025-40082?

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-2025-40082?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-40082 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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