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Linux Kernel CVE-2026-74570

| EUVDEUVD-2026-59635 CRITICAL
2026-08-15 Linux GHSA-jmrc-p9j9-g3vw
Buffer Overflow Linux Red Hat Suse
Critical
Disputed · 9.8 Vendor: Linux
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Severity by source

Sources disagree (Medium–Critical)
Vendor (Linux) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

NTFS parsing is reached only by mounting a crafted local volume, so AV:L and PR:L (mount capability); successful heap overflow yields full C/I/A kernel impact.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
CRITICAL
qualitative
Red Hat
5.5 MEDIUM
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: Linux

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Aug 17, 2026 - 12:31 vuln.today
CVSS changed
Aug 17, 2026 - 06:22 NVD
9.8 (CRITICAL)
Patch available
Aug 15, 2026 - 13:04 EUVD
CVE Published
Aug 15, 2026 - 12:28 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 15, 2026 - 12:28 cve.org
CRITICAL 9.8

DescriptionCVE.org

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

ntfs: harden runlist realloc size calculations

Add a shared helper to safely convert runlist element counts to byte sizes using overflow checks, and use it in both ntfs_rl_realloc() and ntfs_rl_realloc_nofail().

AnalysisAI

Memory corruption in the Linux kernel's NTFS filesystem driver stems from unchecked integer arithmetic when converting runlist element counts into byte sizes inside ntfs_rl_realloc() and ntfs_rl_realloc_nofail(). An attacker who can get a crafted NTFS volume mounted and parsed can overflow the size calculation and corrupt kernel heap memory, potentially escalating to code execution. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malicious NTFS image
Delivery
Present volume via USB or automount
Exploit
Kernel parses runlist metadata
Execution
Integer overflow yields undersized allocation
Persist
Heap out-of-bounds write corrupts kernel memory
Impact
Escalate to kernel code execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires the vulnerable NTFS driver to actually parse attacker-controlled data - concretely, a crafted NTFS volume or disk image must be mounted or otherwise processed by ntfs_rl_realloc()/ntfs_rl_realloc_nofail(). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The headline signals conflict sharply. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious NTFS filesystem image with runlist metadata engineered to trigger the integer overflow, then gets a target host to mount it - for example by inserting a USB drive into an unlocked workstation that automounts removable media, or by submitting the image to an automated analysis/forensics service. When the kernel parses the runlist and reallocates the undersized buffer, the resulting heap overflow corrupts kernel memory, which a skilled attacker may leverage toward privilege escalation. …
Remediation Upstream fix available (commits 57e7b8bf7b02a0140463fea786e5172cbdf2da2f and 8bed376124ab4505b70083a2b91f2c7ef6d51e24); apply the kernel update from your distribution once it ships the corresponding stable backport (fix reflected in the 7.1.8 stable series and 7.2-rc6 per EUVD data - confirm the exact packaged version with your distro's advisory rather than building from the raw commits). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: inventory all Linux systems with NTFS filesystem support enabled and identify which mount NTFS volumes-particularly from external or untrusted sources. …

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Same technique Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-74570 vulnerability details – vuln.today
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