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Critical· 9.8official fix available

CVE-2022-49770

CVE-2022-49770 is a critical vulnerability in the Linux kernel where improper handling of snap decoding could cause realm duplication, leading to use-after-free errors or crashes. The issue has been resolved in updated kernel versions.

publishedMay 1, 2025
last modifiedAug 4, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
43th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 3, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Systems running Linux kernel versions 2.6.34 or 6.1 (and potentially others listed in affected products).

02

Real-world impact

Could allow attackers to cause system instability or crashes via crafted inputs triggering the snap decoding flaw.

03

Why this severity

CVSS 9.8 (critical): High confidence in exploitation potential due to memory corruption risks.

04

What to do about it

official fix available
recommended steps
  1. 011. Upgrade the Linux kernel to a version that includes the fix for CVE-2022-49770 (e.g., latest stable kernel release).
  2. 022. Verify the kernel update was applied successfully via system tools or logs.

NVD-referenced vulnerability description

05

Timeline

  1. May 1, 2025 · May 1, 2025
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Aug 4, 2026 · 2d ago
    Advisory updated
    The NVD record was last revised.
  3. Aug 4, 2026 · 1d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
CVE-2022-49770: CVE-2022-49770 is a critical vulnerability in the Linux kernel where i · Vulnary