Security readout for executives and security teams
Plain-English summary
This is a Linux kernel ntfs3 bug that can make a system read outside allocated memory while listing extended attributes on an NTFS filesystem. The reported failure is a kernel panic, so the clearest business risk is local denial of service. The CVSS score also flags possible high confidentiality impact.
Executive priority
Prioritize remediation for Linux servers, shared workstations, and processing environments that handle NTFS filesystems. Treat as high priority where local users or automated workflows can touch NTFS data, but the source bundle does not support emergency active-exploitation language.
Technical view
CVE-2023-53420 is a CWE-125 out-of-bounds read in fs/ntfs3 xattr handling. syzbot reported KASAN slab-out-of-bounds in ntfs_list_ea through ntfs_listxattr. The fix changes ea_all iteration so a zero-length EA name returns immediately instead of advancing into invalid memory.
Likely exposure
Exposure is most likely on Linux systems running affected kernel builds with ntfs3 support where a local user or local process can trigger extended-attribute listing against NTFS filesystem data. Distro backports may change apparent version exposure, so kernel package provenance matters.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. CVSS indicates local attack vector, low complexity, low privileges, and no user interaction. The public description is based on syzbot crash evidence, not a confirmed in-the-wild campaign.
Researcher notes
The key condition is ea->name_len equal to zero during ntfs_listxattr iteration, causing Add2Ptr-style progression into invalid memory. The public data identifies the bug class and stable commits, but not a complete distro-by-distro affected matrix or weaponized exploit evidence.
Mitigation direction
- Update to a vendor kernel containing the referenced ntfs3 fix.
- Check Linux distribution advisories for backported fixed package versions.
- Restrict unnecessary NTFS filesystem handling on sensitive multi-user systems.
- Avoid relying only on upstream version strings when vendors backport fixes.
Validation and detection
- Inventory Linux kernel versions and distribution package release metadata.
- Confirm whether ntfs3 support is present, built, or loaded.
- Verify the referenced stable commits or distro backports are applied.
- Review systems that process NTFS media or images from less-trusted sources.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-53420 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/f3380d895e28a32632eb3609f5bd515adee4e5a1CVE reference, Linux
- https://git.kernel.org/stable/c/c86a2517df6c9304db8fb12b77136ec7a5d85994CVE reference, Linux
- https://git.kernel.org/stable/c/721b75ea2dfce53a8890dff92ae01afca8e74f88CVE reference, Linux
- https://git.kernel.org/stable/c/3c675ddffb17a8b1e32efad5c983254af18b12c2CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.