Page generated: 07 Nov 2026, 14:13 UTC
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CVE-2026-122192

Improper handling of a failed memory remap in Firecracker versions 0.23.0 through 1.16.1 might allow a guest user with root privileges to read or modify Firecracker VMM process memory via balloon or virtio-mem discard requests on microVMs restored from a snapshot with the File me…

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Improper handling of a failed memory remap in Firecracker versions 0.23.0 through 1.16.1 might allow a guest user with root privileges to read or modify Firecracker VMM process memory via balloon or virtio-mem discard requests on microVMs restored from a snapshot with the File memory backend, if the host fails to create the replacement mapping. To remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.
CVSS 7.5 (HIGH)

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
2.6/10
General review priority; not probability

Evidence confidence: Insufficient evidence

Why this priority?
  • Technical severity: CVSS 7.5: +2.62
  • Fresh EPSS: 0.16%: +0.00

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Based on public data to date.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

No source documents yet.

Score evolution

● Hype   ● Reality

0.01.02.03.04.05.004 Nov 2026 · INSUFFICIENT DATAHype 0.0Reality 2.605 Nov 2026 · BELOW THRESHOLDSHype 0.0Reality 2.6Nov 4Nov 5

━ Hype Score (Perceived)  ━ Reality threat priority. Definition changes are not new attacks.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs. Published 2 days ago. Exploitation evidence usually takes weeks to show up: a low reality score can mean there is no data yet, not that the flaw is mild.

Evidence in context

Confidence in exploitation evidence
Insufficient evidence
Priority basis
Exploitation in attacks unconfirmed; CVSS 7.5; EPSS 0.2%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, high privileges, no user interaction, additional attack conditions.
Observed activity
No exploitation observation is recorded.
Known scale
Not quantified.
Evidence confidence basis
Insufficient evidence

Score evaluated: 2026-11-05 13:59:56.876805+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
04 Nov 2026, 19:35
Score calculated
05 Nov 2026, 13:59