Security readout for executives and security teams
Plain-English summary
This is a Linux kernel ext4 filesystem flaw. A local low-privileged user could trigger a kernel warning during rename handling, with availability impact rather than data theft. The source does not show remote exposure or active exploitation.
Executive priority
Treat as a routine but real availability-risk kernel update. Prioritize multi-user servers, shared compute, and platforms running untrusted workloads. There is no source-backed evidence of active exploitation.
Technical view
In ext4_rename, old.inode can be modified and marked dirty before quota initialization. That can trigger extra_isize/xattr expansion and allocation paths, leading to a warning. CVSS is 5.5, local attack vector, low privileges, no confidentiality or integrity impact, high availability impact.
Likely exposure
Exposure is most relevant on Linux systems using ext4 with affected kernel versions listed in the CVE record. Risk increases where untrusted local users or workloads can perform filesystem operations on ext4-backed storage.
Exploitation context
The CVE is not listed as KEV in the provided bundle. No cited source states active exploitation. The attack vector is local with low privileges and no user interaction.
Researcher notes
The root issue maps to CWE-908 and appears to be uninitialized resource handling in ext4 rename quota setup. Evidence is limited to the CVE description, syzbot-derived trace, CVSS vector, and Linux stable fix references.
Mitigation direction
- Apply kernel updates that include the referenced Linux stable ext4 fixes.
- Use vendor kernel advisories for distribution-specific fixed package versions.
- Prioritize shared systems with untrusted local users or workloads.
- Reduce unnecessary local shell or workload access on affected ext4 hosts.
Validation and detection
- Inventory Linux kernel versions across ext4-backed systems.
- Compare installed kernels against vendor advisories and referenced stable commits.
- Confirm whether affected hosts use ext4 filesystems.
- Verify patched kernels include the ext4_rename quota initialization fix.
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-908: 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-2022-50346 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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/67f6d5a4043f3db0c6bb0e14a0d97a7be8bfb8b5CVE reference, Linux
- https://git.kernel.org/stable/c/33fd7031d634f3b46e59f61adfbb0ea9fe514fefCVE reference, Linux
- https://git.kernel.org/stable/c/7dfb8259f66faafa68d23a261b284d2c2c67649bCVE reference, Linux
- https://git.kernel.org/stable/c/f263e349bacc2f303526dcfa61c4bc50132418b1CVE reference, Linux
- https://git.kernel.org/stable/c/84a2f2ed49d6a4d92b354219077434c57d334620CVE reference, Linux
- https://git.kernel.org/stable/c/def7a39091e60e1c4a2f623629082a00092602beCVE reference, Linux
- https://git.kernel.org/stable/c/135ba9146f4d38abed48a540ef8a8770ff0bd34fCVE reference, Linux
- https://git.kernel.org/stable/c/13271fbbe85d73a7c47058f56a52f2a7f00d6e39CVE reference, Linux
- https://git.kernel.org/stable/c/fae381a3d79bb94aa2eb752170d47458d778b797CVE 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.
Use of Uninitialized Resource
Use of Uninitialized Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.