CVE-2026-89779
Vulnerability Scoring
Analysis In Progress
CVE-2026-89779 Vulnerability Analysis & Exploit Details
CVE-2026-89779
Attack Complexity Details
-
Attack Complexity:
Attack Complexity Analysis In Progress
-
Attack Vector:
Attack Vector Under Analysis
-
Privileges Required:
None
No authentication is required for exploitation.
-
Scope:
Impact is confined to the initially vulnerable component.
-
User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-89779 Details
Status: Received on 16 Sep 2026, 09:17 UTC
Published on: 16 Sep 2026, 09:17 UTC
CVSS Release:
CVE-2026-89779 Vulnerability Summary
CVE-2026-89779: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate ef->size covers the record's name and value When an EA record has a non-zero ef->size, ntfs_read_ea() only checks that the record fits in the remaining buffer (ea_size > bytes), not that ef->size is large enough to hold the record's own name_len + 1 + elength. A crafted image can pass validation with, e.g., ef->size = 24 but elength = 0xffff. ntfs_get_ea() then trusts elength and copies it out of the undersized record, reading past the kmalloc(info->size) allocation and leaking heap memory to userspace via getxattr(): BUG: KASAN: slab-out-of-bounds in ntfs_get_ea (fs/ntfs3/xattr.c:302) Read of size 65535 at addr ffff888100794550 by task exploit __asan_memcpy (mm/kasan/shadow.c:105) ntfs_get_ea (fs/ntfs3/xattr.c:302) ntfs_getxattr (fs/ntfs3/xattr.c:848) __vfs_getxattr (fs/xattr.c:441) vfs_getxattr (fs/xattr.c:474) do_getxattr (fs/xattr.c:800) path_getxattrat (fs/xattr.c:868) do_syscall_64 (arch/x86/entry/syscall_64.c:94) The buggy address is located 80 bytes inside of allocated 84-byte region in cache kmalloc-96 Compute the size the record needs and require ef->size to cover it.
Assessing the Risk of CVE-2026-89779
Access Complexity Graph
The exploitability of CVE-2026-89779 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2026-89779
No exploitability data is available for CVE-2026-89779.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2026-89779, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2026-89779, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
-
Confidentiality:
None
CVE-2026-89779 does not compromise confidentiality.
-
Integrity:
None
CVE-2026-89779 does not impact data integrity.
-
Availability:
None
CVE-2026-89779 does not affect system availability.
CVE-2026-89779 References
External References
- https://git.kernel.org/stable/c/077df8464cf24f8ffc82fb6efec2ae600686e699
- https://git.kernel.org/stable/c/28a924c7e67e6d71abeb04860b61166fecb027fc
- https://git.kernel.org/stable/c/aab1880058ac767d3ea9388a9a7221c776c22c44
- https://git.kernel.org/stable/c/b27e68ad818a4ca2cef8f35f97e75d756714c818
- https://git.kernel.org/stable/c/c22f91d82cb9a29d22bdffdce6c803467984ad0c
- https://git.kernel.org/stable/c/c8a109c9e23a2c7fd548473dde728b2cb8188146
- https://git.kernel.org/stable/c/d585ed08308909c7e6fefb4e8a258aeb29b19ff9
CWE Common Weakness Enumeration
Unknown
Protect Your Infrastructure against CVE-2026-89779: Combat Critical CVE Threats
Stay updated with real-time CVE vulnerabilities and take action to secure your systems. Enhance your cybersecurity posture with the latest threat intelligence and mitigation techniques. Develop the skills necessary to defend against CVEs and secure critical infrastructures. Join the top cybersecurity professionals safeguarding today's infrastructures.
Other 5 Recently Published CVEs Vulnerabilities
- CVE-2026-89793 – In the Linux kernel, the following vulnerability has been resolved: ublk: clear VM_MAYWRITE on read-only ublk char device mmap ublk_ch_mmap() rej...
- CVE-2026-86792 – Apache Airflow Apache Kafka provider versions 1.15.0 before 2.0.0 resolve dotted-path strings found in a Kafka connection's `extra` field into Pyth...
- CVE-2026-86474 – The lack of TLS certificate validation when downloading firmware updates in VEO and VEO-XS Wi-Fi monitors, in versions prior to 01.48.001, allows a...
- CVE-2026-86466 – Apache Airflow FAB provider: the Authentik OAuth path in the FAB auth manager does not validate the issuer or audience claims of the id_token it ac...
- CVE-2026-86443 – Cleartext storage of sensitive information in the DuoxMe application for Android, in versions prior to 4.3.4, allows an attacker with local access ...