CVE-2025-71267 [Medium] | Denial of Service in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST We found an infinite loop bug in the ntfs3 file system that can lead to a Denial-of-Service (DoS) condition. A malformed NTFS image can cause an infinite loop when an ATTR_LIST attribute indicates a zero data size while the driver allocates memory for it. When ntfs_load_attr_list() processes a resident ATTR_LIST with data_size set to zero, it still allocates memory because of al_aligned(0). This creates an inconsistent state where ni->attr_list.size is zero, but ni->attr_list.le is non-null. This causes ni_enum_attr_ex to incorrectly assume that no attribute list exists and enumerates only the primary MFT record. When it finds ATTR_LIST, the code reloads it and restarts the enumeration, repeating indefinitely. The mount operation never completes, hanging the kernel thread. This patch adds validation to ensure that data_size is non-zero before memory allocation. When a zero-sized ATTR_LIST is detected, the function returns -EINVAL, preventing a DoS vulnerability.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-18	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-18

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2025-71267

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-71267 unimportant priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6.	https://security-tracker.debian.org/tracker/CVE-2025-71267
`redhat`	—	—	https://access.redhat.com/security/cve/CVE-2025-71267
`suse`	medium	CVE-2025-71267 severity moderate: SUSE including 26 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 226 product×package rows across 40 product lines (SUSE Linux Enterprise High Availability Extension 15 SP7, SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, … (40 product lines)): Known Not Affected 226.	https://www.suse.com/security/cve/CVE-2025-71267/
`ubuntu`	medium	CVE-2025-71267 medium priority: Ubuntu including 157 source packages (linux, linux-allwinner-5.19, …), 1256 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): DNE 871, ignored 173, needed 129, released 83.	https://ubuntu.com/security/CVE-2025-71267

Affected software / configurations for CVE-2025-71267

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.15, < 5.15.202	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.165	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.128	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.75	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.18.16	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.19, < 6.19.6	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2025-71267

URL	Tags
https://git.kernel.org/stable/c/06909b2549d631a47fcda249d34be26f7ca1711d	Patch
https://git.kernel.org/stable/c/7ef219656febf5ae06ae56b1fce47ebd05f92b68	Patch
https://git.kernel.org/stable/c/8d8c70b57dbeda3eb165c0940b97e85373ca9354	Patch
https://git.kernel.org/stable/c/9267d99fade76d44d4a133599524031fe684156e	Patch
https://git.kernel.org/stable/c/976e6a7c51fabf150478decbe8ef5d9a26039b7c	Patch
https://git.kernel.org/stable/c/9779a6eaaabdf47aa57910d352b398ad742e6a5f	Patch
https://git.kernel.org/stable/c/fd508939dbca5eceefb2d0c2564beb15469572f2	Patch

URL

CVE-2025-71267 | fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST

Exploit prediction scoring system (EPSS) score for CVE-2025-71267

Common vulnerability scoring system (CVSS) metrics for CVE-2025-71267

Weakness enumeration for CVE-2025-71267

GitHub Security Advisory for CVE-2025-71267

OS Trackers for CVE-2025-71267

Affected software / configurations for CVE-2025-71267

References for CVE-2025-71267