SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAwaiting Analysis

CVE-2026-21115

Out-of-bounds write in libcodec2-sec-flacdec.so prior to SMR Oct-2026 Release 1 allows local attackers to write out-of-bounds memory.

MEDIUM 5.1EPSS 0.12%

Does this matter?

Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.

Description

Out-of-bounds write in libcodec2-sec-flacdec.so prior to SMR Oct-2026 Release 1 allows local attackers to write out-of-bounds memory.

CVSS 4.0
5.1 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS
0.12% probability · 2th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-787
Source
mobile.security@samsung.com
EPSS trend
0%3%5%12 October 2026: 0.16%26 October 2026: 0.12%12 October 202626 October 2026

EPSS moved from 0.2% on 12 October 2026 to 0.1% on 26 October 2026.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.