CVE-2026-19499Disclosure

LOWCVSS 7.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Calling strfmon and strfmon_l in the GNU C Library version 2.38 to 2.44 can write past the end of the caller-supplied output buffer when a conversion uses right-justified width padding. Exploitation requires an application code path that calls strfmon or strfmon_l with right-justified width padding into a destination buffer that is large enough for the padding to succeed but too small for the internal memmove call. The field width or format may be attacker-influenced or a fixed susceptible pattern in the caller. At the time of publication, no network-facing application impact is known.

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0.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-122

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

Patch or workaround signal is available
2 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 1 mentions (2026-09-15); latest day: 1
2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets1 URL

By indicator

https://www.valtersit.com/cve/CVE-2026-19499/

Full discourse2 posts

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters39d
Disclosure
CVE-2026-19499: glibc 2.38-2.44 strfmon buffer overflow via right-justified padding. CVSS 7.7. Unpatched. Audit risky calls, update now. https://www.valtersit.com/cve/CVE-2026-19499/ #CVE #infosec #glibc #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet #SysAdmin #cybersecurity #devsecops #devops #developer #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #cybersecurityawareness #cybersecuritynews #cybersecuritytips #python #hacker #kali #ubuntu #debian #docker
Post summary
The tweet discloses CVE-2026-19499, a buffer overflow in glibc versions 2.38-2.44 (CVSS 7.7), notes it is currently unpatched, and urges auditing risky calls and updating now.
0000052
1.1K followersView on X
Upwind Security MDR@UpwindMDR46d
Disclosure
🚨HIGH - glibc strfmon/strfmon_l Right-Justified Padding Buffer Overflow (CVE-2026-19499) In GNU C Library (glibc) strfmon/strfmon_l, right-justified width padding can trigger an internal memmove that writes past the caller-provided output buffer when the buffer seems large enough for padding but not for the move. If an attacker can influence the format/field width, this can lead to memory corruption/crash. 👉Affected: glibc 2.38-2.44
Post summary
The text announces a glibc strfmon/strfmon_l right-justified padding buffer overflow with specific vulnerability details and affected versions. It does not provide a PoC, exploit, patch, or active exploitation information.
0000059
304 followersView on X

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