Background exploitation KEV catalog
CVE-2026-31431

Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in…

CheckOps priority index
7.9/10 Patch within 7 days
Severity7.8
Probability9.8
Exploitation3/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 98.1% higher than 99.9% of CVEs
CVSS 3.1 7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:
Exploited for 186 days 01 May 2026
CISA due date 15 May 2026 for US federal agencies

Exploitation probability EPSS · FIRST

05010025 Sep05 Oct15 Oct24 Oct02 Nov
EPSS probability (%)Percentile among all CVEs

Exploitation signals 3 / 5

  • KEV catalog (CISA)01 May 2026
  • Exploited in EUVD (ENISA)01 May 2026
  • Used by ransomwareno
  • EPSS above 10 %98.1%
  • No account, over the networkno

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.

Affected products

LinuxKernel
Affected versions
  • 4.14
  • patch: 5.10.254
  • patch: 5.15.204
  • 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <961cfa271a918ad4ae452420e7c303149002875b
  • patch: 6.18.22
  • patch: 6.12.85
  • patch: 6.1.170
  • patch: 6.19.12
  • patch: 0
  • patch: 7.0
  • 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <3115af9644c342b356f3f07a4dd1c8905cd9a6fc
  • 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5
Weaknesses (CWE)

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

  1. Published

  2. Exploitation reported (ENISA)

  3. Added to the KEV catalog

  4. CISA remediation due date

  5. EPSS peak: 98.1%

References

Other exploited vulnerabilities from the same vendor

  • CVE-2026-46300Linux Kernel Missing Initialization of a Variable Vulnerability
    5.4 · Rising fast
  • CVE-2026-53266Linux Kernel Out-of-Bounds Write Vulnerability
    4.7 · Actively exploited
  • CVE-2025-39964Linux Kernel Race Condition Vulnerability
    4.4 · Actively exploited
  • CVE-2025-39682Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
    5.8 · Actively exploited
  • CVE-2026-53362Linux Kernel Unspecified Vulnerability
    4.3 · Actively exploited
  • CVE-2022-0995Linux Kernel Out-of-Bounds Write Vulnerability
    4.6 · Actively exploited

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors. All exploited vulnerabilities