Security readout for executives and security teams
Plain-English summary
CVE-2022-49012 is a Linux kernel AFS bug that can prevent AFS server objects from being cleaned up. The documented symptom is a hang when removing the module, with a warning. There is no provided evidence of active exploitation or a broader attack chain.
Executive priority
Treat as a targeted Linux kernel reliability fix, not an emergency. Patch through normal kernel maintenance, prioritizing systems using AFS or requiring frequent module lifecycle operations.
Technical view
The issue is in Linux kernel AFS afs_put_server. An atomic_read was accidentally replaced with atomic_inc_return, leaking server->active and blocking cleanup. The CVE references stable kernel commits that resolve the bug. No CVSS score or CWE is provided.
Likely exposure
Systems running affected Linux kernel versions with AFS support are the likely exposure. The bundle lists Linux kernel 6.0, 6.0.12, and 6.1 as affected, but version-range detail is limited.
Exploitation context
No KEV listing and no cited source indicates active exploitation. The public description documents a reliability failure during cleanup or module removal, not a weaponized exploit path.
Researcher notes
Evidence is narrow: the CVE record describes a reference-counting cleanup leak and rmmod hang. No CVSS, CWE, proof of exploitation, or detailed affected range is provided in the source bundle.
Mitigation direction
- Check your Linux distribution’s kernel advisory for CVE-2022-49012.
- Update to a kernel containing the referenced stable fixes.
- Prioritize systems where AFS is enabled or used.
- Track vendor backports, since fixed kernels may not match upstream versions exactly.
Validation and detection
- Inventory running Linux kernel versions on affected systems.
- Determine whether AFS support is present or in use.
- Confirm vendor changelogs include CVE-2022-49012 or the referenced commits.
- Validate remediation during a maintenance window on representative systems.
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-2022-49012 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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
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/c5078548c29c735f71b05053659c0cb294e738adCVE reference, Linux
- https://git.kernel.org/stable/c/ef4d3ea40565a781c25847e9cb96c1bd9f462bc6CVE 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.