Security readout for executives and security teams
Plain-English summary
This is a Linux kernel eBPF verifier memory leak. A local low-privileged actor could potentially consume kernel memory and affect availability. The sources do not show active exploitation, and the CVE is not listed as KEV.
Executive priority
Handle through normal vulnerability remediation with elevated attention for shared or multi-tenant Linux hosts. The business risk is availability disruption, not data theft, based on current sources.
Technical view
The bug is CWE-401 in Linux kernel BPF function-call checking. Abnormal paths in prepare_func_exit() and __check_func_call() failed to release callee function state, leaking memory during BPF program verification. CVSS is 5.5 with local attack vector, low complexity, low privileges, and high availability impact.
Likely exposure
Exposure is most relevant on Linux systems running affected kernel versions where local users or processes can reach BPF program loading paths. Distro backports may change package-level exposure, so confirm against vendor kernel advisories and the referenced stable commits.
Exploitation context
The provided sources show a local availability issue triggered through BPF verification paths. They do not provide evidence of public exploitation or inclusion in CISA KEV. Treat exploitability details as incomplete beyond the CVSS and kernel fix description.
Researcher notes
The root cause is missed free_func_state() cleanup on abnormal BPF verifier paths around curframe changes. Version metadata is kernel-centric and may not map directly to distro package names; validate using vendor backport information.
Mitigation direction
- Update to a vendor kernel containing the referenced stable fixes.
- Prioritize systems allowing local BPF program loading by non-administrative users.
- Review vendor advisories for distro-specific fixed package versions.
- Restrict unnecessary local access on multi-user Linux systems.
- Apply standard kernel hardening around BPF access where supported.
Validation and detection
- Inventory Linux kernel versions across servers and workloads.
- Map installed distro packages to vendor advisories or fixed stable commits.
- Check whether local users can access BPF program loading functionality.
- Review monitoring for unusual kernel memory pressure or availability events.
- Confirm patched systems rebooted into the updated kernel.
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-401: 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-2022-49837 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/d4944497827a3d14bc5a26dbcfb7433eb5a956c0CVE reference, Linux
- https://git.kernel.org/stable/c/83946d772e756734a900ef99dbe0aeda506adf37CVE reference, Linux
- https://git.kernel.org/stable/c/eb86559a691cea5fa63e57a03ec3dc9c31e97955CVE 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.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.