VulnSocial

CVE-2026-12080Disclosure

LOWCVSS 7.3 · 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

A flaw was found in the QEMU Guest Agent (qga). A local unprivileged user can exploit a vulnerability in the guest-ssh-add-authorized-keys command handler by manipulating symbolic links. This can occur either through a deterministic directory-symlink bypass or a Time-of-Check to Time-of-Use (TOCTOU) file-symlink race. Successful exploitation allows the attacker to gain ownership of arbitrary root-owned files or directories, leading to root access. This vulnerability requires an external management layer (e.g., libvirt) to trigger the affected code path.

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0.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-61

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-20: 1Patch / Workaround · 2026-07-20: 1Technical Details · 2026-07-20: 107-20
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters
    Disclosure

    CVE-2026-12080 - Privilege Escalation in QEMU Guest Agent. TOCTOU & symlink abuse in guest-ssh-add-authorized-keys. CVSS 7.3. Unpatched. Restrict qga access immediately. #CVE #infosec #QEMU #devsecops #sysadmin #linux #developer #cybersecuritytips #redteam #blueteam https://www.valtersit.com/cve/CVE-2026-12080/

    Post summary

    The post announces CVE-2026‑12080, a privilege‑escalation issue in QEMU Guest Agent involving TOCTOU and symlink abuse, with a CVSS score of 7.3, and urges immediate restriction of QGA access, but provides no PoC, exploit code, or evidence of active exploitation.

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