Security readout for executives and security teams
Plain-English summary
This Linux kernel issue affects the Amazon ENA network driver. During device reset, an exponential backoff calculation can shift too far and trigger undefined-behavior sanitizer failures, potentially causing a kernel panic. Business risk is strongest for cloud workloads using ENA-backed networking on affected kernels.
Executive priority
Treat as high priority for ENA-dependent production Linux fleets because failure can affect host availability. It is not currently supported as known exploited from the supplied evidence, so prioritize patching by exposure and service criticality.
Technical view
The ENA driver’s reset path can compute an excessive shift exponent in ena_delay_exponential_backoff_us, producing a shift-out-of-bounds condition. The source describes UBSAN reporting an exponent of 32 for a 32-bit unsigned value during ena_fw_reset_device. Stable fixes cap the exponent used for backoff.
Likely exposure
Likely exposure is Linux systems using the Amazon ENA driver, especially EC2-style environments where ENA adapters reset. The source lists Linux kernel affected version ranges and stable fix commits, but does not provide distribution-specific package status.
Exploitation context
No active exploitation is stated in the provided sources, and KEV is false. The CVSS vector indicates local access with low privileges and no user interaction. The public description shows the issue observed during adapter reset, not a remote exploitation workflow.
Researcher notes
The provided CWE entry says CWE-125, but the description centers on shift-out-of-bounds in ENA backoff logic. Avoid assuming remote reachability. Focus validation on kernel branch, ENA driver presence, reset-path logs, and whether stable commit fixes are present.
Mitigation direction
- Inventory Linux hosts using the ENA network driver.
- Map running kernel versions against vendor advisories and stable fix commits.
- Prioritize cloud workloads where ENA resets affect availability.
- Apply kernel or distribution updates that include the referenced stable fixes.
- If no package fix is available, follow Linux or distribution vendor guidance.
Validation and detection
- Check whether hosts load or depend on the ENA driver.
- Confirm the running kernel includes one of the referenced stable fixes.
- Review kernel logs for UBSAN shift-out-of-bounds reports in ena_com.c.
- Validate distribution package advisories before marking systems remediated.
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-2023-53272 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/1e760b2d18bf129b3da052c2946c02758e97d15eCVE reference, Linux
- https://git.kernel.org/stable/c/3e36cc94d6e60a27f27498adf1c71eeba769ab33CVE reference, Linux
- https://git.kernel.org/stable/c/90947ebf8794e3c229fb2e16e37f1bfea6877f14CVE reference, Linux
- https://git.kernel.org/stable/c/0939c264729d4a081ff88efce2ffdf85dc5331e0CVE reference, Linux
- https://git.kernel.org/stable/c/1e9cb763e9bacf0c932aa948f50dcfca6f519a26CVE 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.