Security readout for executives and security teams
Plain-English summary
This CVE concerns a disputed Linux kernel sound subsystem issue reported through version 5.6.3. The scoring suggests serious impact if exploitable, but kernel engineers disputed the finding for existing callers. Treat it as a validation item for Linux fleets rather than evidence of active compromise.
Executive priority
Handle as a medium-priority Linux hygiene and vendor-validation item. The theoretical impact is high, but exploitation is local, affected products are unspecified, and the finding is disputed in the CVE text.
Technical view
The report targets snd_ctl_elem_add in sound/core/control.c, where info->owner influences count and later private_size*count multiplication. The CVSS vector is local, low-complexity, low-privilege, no user interaction, high CIA impact. The CVE notes existing SNDRV_CTL_IOCTL_ELEM_ADD and REPLACE callers were considered safely designed despite owner-field misuse.
Likely exposure
Potential exposure is Linux systems using kernel versions through 5.6.3, especially where local untrusted users exist. The CVE record does not name affected distributions, packages, CPEs, or vendor-fixed versions.
Exploitation context
The source bundle does not show KEV status, active exploitation, or a confirmed exploit. The CVE explicitly records a dispute from kernel engineers, saying the issue would matter mainly if unfamiliar new callers were added.
Researcher notes
Do not assume exploitability from CVSS alone. The key research question is whether any caller can make info->owner control count unsafely. Existing named callers are described by kernel engineers as intentionally misusing the field safely.
Mitigation direction
- Check distribution and kernel vendor advisories for CVE-2020-11725 guidance.
- Prioritize supported kernel streams over end-of-life or custom kernels.
- Reduce unnecessary local user access on multi-user Linux systems.
- Review custom kernel patches or out-of-tree ALSA callers for owner-field assumptions.
- Track whether your vendor classifies this as applicable or disputed.
Validation and detection
- Inventory Linux kernel versions across servers, workstations, and appliances.
- Identify systems running kernel versions through 5.6.3 or vendor backports.
- Check whether ALSA sound control functionality is present and reachable.
- Review vendor CVE statements before opening remediation tickets.
- Confirm no local custom code added unsafe callers around snd_ctl_elem_add.
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-704: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-11725 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.
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:H/I:H/A:H1.85.9CISA-ADPVulnerability 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
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://twitter.com/yabbadabbadrew/status/1248632267028582400CVE reference, mitre · x_refsource_MISC
- https://github.com/torvalds/linux/blob/3b2549a3740efb8af0150415737067d87e466c5b/sound/core/control.c#L1434-L1474CVE reference, mitre · x_refsource_MISC
- https://lore.kernel.org/alsa-devel/s5h4ktmlfpx.wl-tiwai%40suse.de/CVE reference, mitre · x_refsource_MISC
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.
Incorrect Type Conversion or Cast
Incorrect Type Conversion or Cast represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.