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CVE Record

CVE-2020-36785: media: atomisp: Fix use after free in atomisp_alloc_css_stat_bufs()

In the Linux kernel, the following vulnerability has been resolved: media: atomisp: Fix use after free in atomisp_alloc_css_stat_bufs() The "s3a_buf" is freed along with all the other items on the "asd->s3a_stats" list. It leads to a double free and a use after free.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel memory-safety flaw in the atomisp media driver. The source says a buffer can be freed twice and then used after being freed. Business urgency depends on whether affected Linux kernels with this driver are deployed; no source in the bundle shows active exploitation.

Executive priority

Treat this as a targeted Linux kernel maintenance item, not an emergency by evidence provided. Prioritize asset identification and vendor-patched kernel rollout where atomisp exposure exists.

Technical view

CVE-2020-36785 affects Linux kernel atomisp_alloc_css_stat_bufs(). The s3a_buf object is freed along with items on asd->s3a_stats, creating double-free and use-after-free conditions. The bundle does not provide CVSS, CWE, exploitability, or impact detail.

Likely exposure

Exposure is most likely on Linux systems running affected kernel versions where the atomisp media driver is present or enabled. The affected-version data is limited and should be reconciled against distribution kernel advisories and package backports.

Exploitation context

The bundle marks KEV as false and provides no cited evidence of exploitation in the wild. It also does not describe attack prerequisites, reachability, required privileges, or confirmed impact beyond the kernel memory-management bug.

Researcher notes

Key evidence is the upstream Linux fix description: s3a_buf is freed through the asd->s3a_stats list, causing double free and use-after-free. Missing data includes CVSS, CWE, attack vector, privilege requirement, and fixed distribution package versions.

Mitigation direction

  • Check Linux distribution advisories for CVE-2020-36785 and atomisp fixes.
  • Update affected kernel packages to versions containing the referenced stable commits.
  • Prioritize systems with media, camera, or atomisp driver exposure.
  • Disable unused atomisp functionality only if vendor-supported and operationally safe.
  • Track remediation through normal kernel maintenance and reboot workflows.

Validation and detection

  • Inventory kernel versions across Linux hosts and appliances.
  • Check whether the atomisp driver is built, loaded, or available.
  • Map installed kernel packages to distribution backport notes.
  • Confirm patched kernels are running after reboot, not only installed.
  • Document exceptions where vendor guidance is unavailable.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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-2020-36785 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
2ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxad85094b293e40e7a2f831b0311a389d952ebd5e, ad85094b293e40e7a2f831b0311a389d952ebd5e, ad85094b293e40e7a2f831b0311a389d952ebd5e, ad85094b293e40e7a2f831b0311a389d952ebd5eunaffected
LinuxLinux5.8, 0, 5.10.37, 5.11.21, 5.12.4, 5.13affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.