Security readout for executives and security teams
Plain-English summary
CVE-2022-50097 is a Linux kernel bug in the s3fb framebuffer driver. Improper screen-size input can make the kernel write beyond the expected framebuffer area and crash with a kernel page fault. The sources do not provide CVSS, CWE, or business impact details.
Executive priority
Handle through normal kernel patch management unless the environment uses legacy S3 framebuffer hardware, exposed local shells, or broad framebuffer device access. Escalate if affected systems are multi-user or difficult to patch.
Technical view
In s3fb_set_par(), screen_size is derived from user input. If it exceeds info->screen_size, memset_io() can write beyond the valid mapped screen memory and trigger a supervisor-mode page fault. The kernel fix adds a size check before memset_io().
Likely exposure
Exposure appears limited to Linux systems using the fbdev s3fb driver or relevant framebuffer path. Systems without this driver, without framebuffer device access, or running kernels with the stable fix are less likely to be affected.
Exploitation context
The source shows a kernel crash path through fb_set_var and do_fb_ioctl. There is no cited evidence of active exploitation, public weaponization, privilege escalation, or remote reachability. KEV status is false in the provided bundle.
Researcher notes
Evidence is narrow: the bundle documents the bug, crash trace, affected Linux ranges, and stable commits. It does not establish exploitability beyond denial-of-service, attacker prerequisites, or impact on confidentiality or integrity.
Mitigation direction
- Update to a vendor kernel containing the referenced stable fix.
- Check distribution advisories for backported fixes before assuming version exposure.
- Disable or avoid loading s3fb where it is not operationally required.
- Restrict access to framebuffer devices to trusted users only.
Validation and detection
- Inventory Linux kernel versions on systems with framebuffer support.
- Confirm whether s3fb is built, loaded, or needed on affected hosts.
- Verify vendor package changelogs or source contain the referenced fix.
- Review device permissions for /dev/fb* on multi-user systems.
Public sources used
- CVE Program
- CVE List V5
- Linux stable commit 574912261528589012b61f82d368256247c3a5a8
- Linux stable commit 3c35a0dc2b4e7acf24c796043b64fa3eee799239
- Linux stable commit eacb50f1733660911827d7c3720f4c5425d0cdda
- Linux stable commit 5e0da18956d38e7106664dc1d06367b22f06edd3
- Linux stable commit ce50d94afcb8690813c5522f24cd38737657db81
- Linux stable commit 52461d387cc8c8f8dc40320caa2e9e101f73e7ba
- Linux stable commit e2d7cacc6a2a1d77e7e20a492daf458a12cf19e0
- Linux stable commit 6ba592fa014f21f35a8ee8da4ca7b95a018f13e8
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
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CVE-2022-50097 mapping review
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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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/574912261528589012b61f82d368256247c3a5a8CVE reference, Linux
- https://git.kernel.org/stable/c/3c35a0dc2b4e7acf24c796043b64fa3eee799239CVE reference, Linux
- https://git.kernel.org/stable/c/eacb50f1733660911827d7c3720f4c5425d0cddaCVE reference, Linux
- https://git.kernel.org/stable/c/5e0da18956d38e7106664dc1d06367b22f06edd3CVE reference, Linux
- https://git.kernel.org/stable/c/ce50d94afcb8690813c5522f24cd38737657db81CVE reference, Linux
- https://git.kernel.org/stable/c/52461d387cc8c8f8dc40320caa2e9e101f73e7baCVE reference, Linux
- https://git.kernel.org/stable/c/e2d7cacc6a2a1d77e7e20a492daf458a12cf19e0CVE reference, Linux
- https://git.kernel.org/stable/c/6ba592fa014f21f35a8ee8da4ca7b95a018f13e8CVE 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.