Security readout for executives and security teams
Plain-English summary
A local user or process can corrupt dm-crypt storage when authenticated encryption, direct I/O, and concurrent data modification coincide. The flaw can invalidate authentication tags, threatening stored-data integrity and system availability. It does not expose data confidentiality according to the supplied CVSS assessment.
Executive priority
Prioritize affected multi-user, shared-compute, and storage-critical Linux systems. Remediation is important because successful triggering can corrupt encrypted storage and interrupt operations, but the local-access requirement and specific configuration reduce urgency relative to remotely exploitable flaws. Use normal high-severity patch timelines, accelerated where data restoration would be costly.
Technical view
dm-crypt encrypted data from a buffer that could change during authenticated-encryption processing, potentially producing an invalid authentication tag. The kernel fix copies data into a cloned bio before encryption. CVSS 3.1 is 7.1: local access, low complexity, low privileges, no user interaction, with high integrity and availability impact.
Likely exposure
Exposure requires Linux systems using dm-crypt authenticated encryption and affected kernels, plus a local process able to combine O_DIRECT writes with concurrent buffer modification. Systems not using this dm-crypt mode are unlikely to encounter the vulnerable path. Confirm distribution-specific kernel status because the supplied version data does not clearly map every release to a fixed version.
Exploitation context
The supplied record does not identify active exploitation, and the CVE is not listed as KEV in the bundle. Exploitation requires local, low-privileged access and a specific concurrent I/O condition. The documented consequence is device corruption rather than confidentiality loss or remote compromise.
Researcher notes
The flaw is a race between authenticated encryption and modification of the source data. Copying into the clone bio creates stable input before encryption, at a possible performance cost. The bundle provides no CWE, public exploit evidence, or complete distribution-by-distribution fixed-version mapping; researchers should avoid inferring broader impact beyond dm-crypt authenticated-encryption use.
Mitigation direction
- Install a vendor-supported kernel containing the referenced dm-crypt fix.
- Check Linux distribution advisories for the correct patched package and reboot requirements.
- Until updated, limit untrusted local access to affected encrypted-storage workloads.
- Maintain verified backups for systems where storage corruption would disrupt operations.
Validation and detection
- Inventory kernel versions and identify systems using dm-crypt authenticated encryption.
- Compare installed kernels with vendor advisories and referenced stable-kernel fixes.
- Confirm updated systems booted into the patched kernel, not an older installed image.
- Review storage integrity and system logs for unexplained authentication or I/O failures.
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.
CVE-2024-26763 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:N/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:L/UI:N/S:U/C:N/I:H/A:H1.85.2LinuxVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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/43a202bd552976497474ae144942e32cc5f34d7eCVE reference, Linux
- https://git.kernel.org/stable/c/0dccbb93538fe89a86c6de31d4b1c8c560848eaaCVE reference, Linux
- https://git.kernel.org/stable/c/3c652f6fa1e1f9f02c3fbf359d260ad153ec5f90CVE reference, Linux
- https://git.kernel.org/stable/c/1a4371db68a31076afbe56ecce34fbbe6c80c529CVE reference, Linux
- https://git.kernel.org/stable/c/e08c2a8d27e989f0f5b0888792643027d7e691e6CVE reference, Linux
- https://git.kernel.org/stable/c/64ba01a365980755732972523600a961c4266b75CVE reference, Linux
- https://git.kernel.org/stable/c/d9e3763a505e50ba3bd22846f2a8db99429fb857CVE reference, Linux
- https://git.kernel.org/stable/c/50c70240097ce41fe6bce6478b80478281e4d0f7CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlCVE reference, CVE · x_transferred
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.