Security readout for executives and security teams
Plain-English summary
CVE-2022-49629 is a Linux kernel race condition in nexthop handling. A local low-privileged user may be able to trigger an availability impact, but the CVSS data shows high attack complexity and no confidentiality or integrity impact.
Executive priority
Treat as routine kernel patching with moderate urgency. It is not supported as remotely exploitable or actively exploited by the supplied evidence, but availability impact on shared Linux systems justifies timely remediation.
Technical view
The issue is a CWE-362 data race around reads of nexthop_compat_mode while it can change concurrently. The kernel fix adds READ_ONCE() to readers. CVSS 3.1 is 4.7: local, high complexity, low privileges, no user interaction, availability high.
Likely exposure
Exposure is mainly Linux systems running affected kernel builds identified by the CVE source bundle. The impact requires local access with low privileges, so internet-facing remote exposure is not indicated by the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The scoring indicates local exploitation conditions, high complexity, and an availability-only impact. No public exploit details are provided in the supplied sources.
Researcher notes
The public record is sparse. The key technical evidence is the kernel commit message describing concurrent reads of nexthop_compat_mode and the READ_ONCE() fix. Validate exposure through exact kernel source or vendor backport status rather than version strings alone.
Mitigation direction
- Check Linux distribution advisories for kernels containing the listed stable fixes.
- Update affected systems through normal vendor kernel packages.
- Prioritize shared, multi-user, and container-host systems with untrusted local users.
- If patching is delayed, reduce unnecessary local account and shell access.
- Track kernel.org stable commits referenced by the CVE for fix confirmation.
Validation and detection
- Inventory Linux kernel versions across servers, workstations, and container hosts.
- Compare installed kernels against vendor advisories and the referenced stable commits.
- Confirm patched kernels are booted, not only installed.
- Review systems with local untrusted users for elevated availability risk.
- Document exceptions where vendor guidance is not yet available.
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-362: 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-2022-49629 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
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/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:H/PR:L/UI:N/S:U/C:N/I:N/A:H13.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:L/AC:H/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/a51040d4b120f3520df64fb0b9c63b31d69bea9bCVE reference, Linux
- https://git.kernel.org/stable/c/0d17723afea3ae8c9f245c9bbd2ba5945b77e812CVE reference, Linux
- https://git.kernel.org/stable/c/ae3054f6fbccc90f14ecd6cf9b2c09a2401c64fdCVE reference, Linux
- https://git.kernel.org/stable/c/bdf00bf24bef9be1ca641a6390fd5487873e0d2eCVE 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.
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.