Security readout for executives and security teams
Plain-English summary
This Linux kernel NFSD flaw can cause a send buffer overflow during NFSv2 READ handling. Systems running the kernel NFS server are the concern. The source describes a crafted, oversized RPC record causing reply-buffer shrinkage. Impact is rated high because memory corruption could affect confidentiality, integrity, and availability.
Executive priority
Prioritize remediation for Linux NFS servers, especially shared infrastructure or systems reachable by untrusted users or networks. Business urgency is high but not emergency-level from the provided evidence because active exploitation is not shown.
Technical view
NFSD reuses one page array for RPC receive and send buffers. After receiving a large TCP RPC record, svc_process() can reduce rq_res space for the reply. In NFSv2 READ handling, that can overflow the send buffer. The issue is classified as CWE-787 with CVSS 3.1 score 7.8.
Likely exposure
Exposure is most likely on Linux systems running affected kernel versions with NFSD serving NFSv2. The bundle does not provide distribution package names, enabled-by-default status, or exact environmental prerequisites beyond NFSD, NFSv2 READ, TCP RPC behavior, and affected Linux kernel ranges.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The CVSS vector says local access with low privileges, while the description discusses a client influencing TCP RPC record sizing. Treat exploitability details as incomplete without vendor advisories.
Researcher notes
Key uncertainty is exposure semantics: CVSS lists local, but the description centers on a crafted TCP RPC record from a client. Avoid assuming remote unauthenticated exploitation without more source evidence. Focus analysis on NFSD NFSv2 READ reply construction and referenced stable commits.
Mitigation direction
- Apply a Linux kernel update containing the referenced stable fixes.
- Check distribution vendor advisories for exact fixed kernel packages.
- Disable unnecessary NFSD or NFSv2 support where operationally possible.
- Restrict NFS/RPC access to trusted hosts and networks.
- Prioritize exposed or multi-user NFS servers before isolated systems.
Validation and detection
- Inventory Linux hosts running the kernel NFS server.
- Check kernel versions against vendor advisories and referenced stable commits.
- Confirm whether NFSv2 service is enabled or required.
- Review firewall exposure for NFS and RPC services.
- Verify patched kernels are booted after maintenance.
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-787: 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-2022-50410 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.
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:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/2007867c5874134f2271eb276398208070049dd3CVE reference
- https://git.kernel.org/stable/c/2be9331ca6061bc6ea32247266f45b8b21030244CVE reference
- https://git.kernel.org/stable/c/ea4c3eee0fd72fcedaa238556044825639cd3607CVE reference
- https://git.kernel.org/stable/c/1868332032eccbab8c1878a0d918193058c0a905CVE reference
- https://git.kernel.org/stable/c/401bc1f90874280a80b93f23be33a0e7e2d1f912CVE reference
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 Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.