Vulnerability

CVE-2021-25487

High· 7.3KEVCVSS7.3EPSS3%

.rules3/5

Samsung Mobile Devices Out-of-Bounds Read Vulnerability

Samsung mobile devices contain an out-of-bounds read vulnerability within the modem interface driver due to a lack of boundary checking of a buffer in set_skb_priv(), leading to remote code execution by dereference of an invalid function pointer.

Threat signal

85/100

High

Severity

high

CVSS

7.3

EPSS

Active

KEV

CISA KEV — actively exploited

1059d overdue

AffectedSamsung — Mobile Devices

Added to KEV

2023-06-29

Federal patch due (BOD 22-01)

2023-07-20

Required action (CISA verbatim)

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable

Vendor advisory + references

CISA description: “Samsung mobile devices contain an out-of-bounds read vulnerability within the modem interface driver due to a lack of boundary checking of a buffer in set_skb_priv(), leading to remote code execution by dereference of an invalid function pointer.”

CVSS

v3.1Open in FIRST calculator →

7.3/ 10HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Attack VectorLocalRequires local access — shell, console, or local app.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredLowStandard user privileges sufficient.
User InteractionNoneFully automated — no victim action needed.
ScopeChangedImpact extends beyond the vulnerable component (e.g. sandbox escape).
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactLowSome data modification; attacker doesn't fully control extent.
Availability ImpactNoneNo availability impact.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

2.56%

probability of exploitation in next 30 days

p86

higher than 86% of all CVEs

3-day trend↑ 0pp

Mid-pack — moderate exploitation likelihood.

Vendor VEX

No VEX statements published for CVE-2021-25487. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAct

Active exploitation with total impact on essential/support systems

exploitation: active
automatable: no
impact: total
mission: support

Lifecycle

2023-06-29Added to CISA KEVransomware: Unknown
2023-06-29Published
2023-07-20Federal patch due (BOD 22-01)
2026-06-12Last modified1 source

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.