Security readout for executives and security teams
Plain-English summary
CVE-2022-50384 is a Linux kernel use-after-free bug in the staging VME tsi148 driver. If a vulnerable system exposes this driver to a local low-privileged user, the impact could include kernel crash or compromise of confidentiality and integrity. The sources do not show remote exposure or active exploitation.
Executive priority
Treat as high priority for specialized Linux systems using VME tsi148 functionality or allowing untrusted local users. For typical servers without this staging driver, urgency is lower but still belongs in normal kernel patch cycles.
Technical view
The flaw is in tsi148_dma_list_add() in drivers/staging/vme_user/vme_tsi148.c. On an error path, an entry is freed without first removing entry->list from list->entries, leaving later list traversal able to reference freed memory. It is classified as CWE-416 with CVSS 3.1 score 7.8.
Likely exposure
Exposure is most likely on Linux systems using kernels in the affected ranges with the staging vme_user tsi148 VME driver built and reachable locally. This appears specialized hardware-driver exposure, not a general internet-facing server issue.
Exploitation context
The CVSS vector is local, low complexity, low privileges, no user interaction, with high confidentiality, integrity, and availability impact. KEV is false, and the provided sources do not cite public exploitation or weaponized proof-of-concept activity.
Researcher notes
The vulnerable condition is an error-path list lifetime bug: entry->list remains linked after entry is freed. Practical exploitability depends on access to the driver path and kernel configuration. The bundle provides fix references but no distro-specific package mapping or exploitation evidence.
Mitigation direction
- Apply vendor or Linux stable kernel updates containing the referenced fixes.
- Prioritize systems with VME hardware or the vme_user tsi148 driver enabled.
- Disable or avoid loading the affected driver where operationally unnecessary.
- Restrict local shell access on systems that cannot be updated promptly.
- Track distro kernel advisories for backported fixes and exact package versions.
Validation and detection
- Inventory kernel versions against the affected and fixed source ranges.
- Check whether vme_user or vme_tsi148 is built, packaged, or loaded.
- Confirm installed kernels include a referenced stable fix or vendor backport.
- Review kernel package changelogs for CVE-2022-50384 or matching commit references.
- Test critical VME-dependent workloads after kernel update or driver disablement.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit 5cc4eea715a3fcf4e516662f736dfee63979465f
- Linux stable commit 51c0ad3b7c5b01f9314758335a13f157b05fa56d
- Linux stable commit e6b0adff99edf246ba1f8d464530a0438cb1cbda
- Linux stable commit a45ba33d398a821147d7e5f16ead7eb125e331e2
- Linux stable commit 5d2b286eb034af114f67d9967fc3fbc1829bb712
- Linux stable commit 1f5661388f43df3ac106ce93e67d8d22b16a78ff
- Linux stable commit cf138759a7e92c75cfc1b7ba705e4108fe330edf
- Linux stable commit 85db68fc901da52314ded80aace99f8b684c7815
- Linux stable commit 357057ee55d3c99a5de5abe8150f7bca04f8e53b
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-416: 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-2022-50384 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/5cc4eea715a3fcf4e516662f736dfee63979465fCVE reference
- https://git.kernel.org/stable/c/51c0ad3b7c5b01f9314758335a13f157b05fa56dCVE reference
- https://git.kernel.org/stable/c/e6b0adff99edf246ba1f8d464530a0438cb1cbdaCVE reference
- https://git.kernel.org/stable/c/a45ba33d398a821147d7e5f16ead7eb125e331e2CVE reference
- https://git.kernel.org/stable/c/5d2b286eb034af114f67d9967fc3fbc1829bb712CVE reference
- https://git.kernel.org/stable/c/1f5661388f43df3ac106ce93e67d8d22b16a78ffCVE reference
- https://git.kernel.org/stable/c/cf138759a7e92c75cfc1b7ba705e4108fe330edfCVE reference
- https://git.kernel.org/stable/c/85db68fc901da52314ded80aace99f8b684c7815CVE reference
- https://git.kernel.org/stable/c/357057ee55d3c99a5de5abe8150f7bca04f8e53bCVE 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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.