Security readout for executives and security teams
Plain-English summary
A Linux ext4 filesystem bug can leave kernel memory referenced after it is freed when mount options are changed. A highly privileged local user could trigger the flaw, potentially exposing information or affecting system integrity and availability. It is not a remote, unauthenticated vulnerability.
Executive priority
Schedule remediation through routine privileged-access vulnerability management, accelerating internet-facing or multi-user systems where privileged compromise is plausible. This is not an emergency remote-exploitation issue, but kernel memory-safety flaws can amplify an existing compromise and warrant timely correction.
Technical view
CVE-2024-0775 is a CWE-416 use-after-free in __ext4_remount within fs/ext4/super.c. Old quota filenames may be freed before a later operation fails, leaving stale references. CVSS 3.1 is 6.7: local access, low complexity, high privileges, no user interaction, with potentially high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most relevant on systems using an affected Linux kernel, ext4, and accounts capable of changing mount options. The supplied data marks RHEL 9 kernel and kernel-rt affected, while RHEL 6–8 entries are unaffected. Upstream version scope is incomplete and should be verified against vendor guidance.
Exploitation context
The supplied record is not flagged in KEV and provides no evidence of active exploitation. Exploitation requires local access and high privileges, substantially limiting common attack paths. It may still matter as part of a chained attack after an adversary gains privileged system access.
Researcher notes
The described failure path concerns quota filename lifetime during ext4 remount error handling. The supplied version list does not define reliable affected ranges, so avoid extrapolating upstream exposure. The CVSS vector indicates high privileges and potential high CIA impact, although the narrative specifically identifies information leakage.
Mitigation direction
- Check the operating-system vendor advisory for fixed kernel package versions and supported remediation.
- Prioritize updates for affected RHEL 9 kernel and kernel-rt installations.
- Restrict privileged local access and mount-option changes until remediation is confirmed.
- Reboot into the corrected kernel when required by vendor guidance.
Validation and detection
- Inventory installed kernel packages, running kernel versions, and systems using ext4 filesystems.
- Compare each kernel build against its distribution vendor's CVE-2024-0775 status and guidance.
- Confirm RHEL 9 kernel and kernel-rt assets are treated as affected unless vendor evidence says otherwise.
- After remediation, verify the running kernel matches the corrected vendor-supplied package.
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-416: 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-2024-0775 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
- 6.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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:H/UI:N/S:U/C:H/I:H/A:H0.85.9redhatVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Made public.
- Source timelineredhat
Reported to Red Hat.
- 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://access.redhat.com/security/cve/CVE-2024-0775CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2259414CVE reference, redhat · issue-tracking, x_refsource_REDHAT
- https://scm.linefinity.com/common/linux-stable/commit/4c0b4818b1f636bc96359f7817a2d8bab6370162CVE reference, redhat
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 After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.