Security readout for executives and security teams
Plain-English summary
This is a Linux kernel denial-of-service flaw in the AF_RXRPC networking code. A local user with access to the affected socket behavior could trigger a kernel crash when a socket is closed, affecting system availability rather than data theft or integrity.
Executive priority
Treat as a routine but real availability risk. Patch through normal kernel maintenance, accelerating for shared infrastructure where local users or untrusted workloads could crash hosts.
Technical view
AF_RXRPC listen() allowed a backlog value that exceeded the usable capacity of its preallocation ring. That mismatch could leave an uninitialized call object during socket release, leading to a NULL pointer dereference in rxrpc_send_abort_packet. The CVE maps to CWE-476 and CVSS 5.5, local, low complexity, low privileges, availability high.
Likely exposure
Exposure is most relevant on Linux systems running affected kernels where local users, services, containers, or workloads can exercise AF_RXRPC socket functionality. The bundle does not identify specific Linux distributions, appliances, or cloud images.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The described impact is a local kernel crash condition, not remote compromise, privilege escalation, or data exposure.
Researcher notes
Evidence supports a local availability bug in Linux AF_RXRPC caused by backlog/ring-capacity mismatch. The bundle provides upstream stable commit references but no distro package matrix, exploit-in-the-wild reporting, or workaround details beyond applying vendor-backed kernel fixes.
Mitigation direction
- Apply Linux stable kernel updates containing the referenced rxrpc backlog fix.
- Check distribution vendor advisories for exact fixed package versions.
- Prioritize shared hosts, multi-user systems, and container platforms first.
- Restrict untrusted local workload execution where timely patching is not possible.
Validation and detection
- Inventory Linux kernel versions across servers, images, and container hosts.
- Confirm whether affected systems include AF_RXRPC/rxrpc functionality.
- Verify patched kernels include one of the referenced stable commits.
- Review crash telemetry for rxrpc-related NULL pointer dereference traces.
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-476: 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-2022-49450 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/61fb38cfbb1d54d3dafd0c25752f684b3cd00b32CVE reference, Linux
- https://git.kernel.org/stable/c/616f76498d5ddf26b997caf64a95cda3c8a55533CVE reference, Linux
- https://git.kernel.org/stable/c/4a3a78b7918bdd723d8c7c9786522ca969bffcc4CVE reference, Linux
- https://git.kernel.org/stable/c/91b34bf0409f43bb60453bab23c5beadd726d022CVE reference, Linux
- https://git.kernel.org/stable/c/5b4826657d36c218e9f08e8d3223b0edce3de88fCVE reference, Linux
- https://git.kernel.org/stable/c/b3a9b227d5e7467b8518160ff034ea22bb9de573CVE reference, Linux
- https://git.kernel.org/stable/c/369de57492c4f1a42563c5a3bd365822ca3bfc79CVE reference, Linux
- https://git.kernel.org/stable/c/e198f1930050e3115c80b67d9249f80f98a27c67CVE reference, Linux
- https://git.kernel.org/stable/c/88e22159750b0d55793302eeed8ee603f5c1a95cCVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.