CVE-2026-31431
HighExploitedPublic exploitLinux kernel (Intel IoTG Real-time) vulnerabilities
Published May 25, 2026 · Updated Oct 15, 2026 · Also known as DEBIAN-CVE-2026-31431, LSN-120-1, ROOT-OS-DEBIAN-11-CVE-2026-31431, ROOT-OS-DEBIAN-12-CVE-2026-31431, ROOT-OS-DEBIAN-13-CVE-2026-31431, ROOT-OS-UBUNTU-2204-CVE-2026-31431, ROOT-OS-UBUNTU-2404-CVE-2026-31431, USN-8226-1, USN-8226-2
Key Facts
Patch immediately- CVE-2026-31431 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting docker (alpine), linux-aws-6.12 (chainguard), linux-azure-6.12 (chainguard) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 1, 2026. Public exploit code is available.
- EPSS estimates a 3.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including aws 120.2, aws-5.15 120.2, aws-6.8 120.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
3.4%
Higher than 88.7% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-31431 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 1, 2026 | May 15, 2026 | Not reported |
| Industry KEV feed | May 1, 2026 | May 15, 2026 | Not reported |
| CIRCL KEV | May 1, 2026 | May 15, 2026 | Not reported |
| ENISA EUVD | May 1, 2026 | n/a | Not reported |
Required action: "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
5,037 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| dockeralpine | See advisory | 29.4.3-r0 |
| linux-aws-6.12chainguard | See advisory | 6.12.83-r2 |
| linux-azure-6.12chainguard | See advisory | 6.12.83-r2 |
| linux-gcp-6.12chainguard | See advisory | 6.12.83-r2 |
| linux-qemu-6.12chainguard | See advisory | 6.12.85-r0 |
Patched Releases
aws
120.2
aws-5.15
120.2
aws-6.8
120.2
azure
120.2
azure-4.15
120.2
azure-5.15
120.2
bpftool
1:6.1.168-203.330.amzn2023, 4.18.0-553.123.1.el8_10, 5.10.254-1.ph4, 5.15.0-318.199.3.6.el8uek, 5.15.0-318.199.3.6.el9uek, 5.15.0-319.201.4.4.el8uek, 5.15.0-319.201.4.4.el9uek, 5.15.0-320.202.8.2.el8uek, 5.15.0-320.202.8.2.el9uek, 6.1.177-1.ph5, 7.7.0+6.17.0-29.29, NA
bpftool6.12
1:6.12.80-106.156.amzn2023
bpftool6.18
1:6.18.20-41.237.amzn2023
cluster-md-kmp-64kb
6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150600.23.100.1
cluster-md-kmp-azure
6.12.0-160000.29.1, 6.12.0-160000.37.1
cluster-md-kmp-default
4.12.14-122.302.1, 4.12.14-122.323.1, 5.14.21-150400.24.205.1, 5.14.21-150400.24.235.1, 5.14.21-150500.55.149.1, 5.14.21-150500.55.182.1, 6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150600.23.100.1, 6.4.0-150600.23.130.1, 6.4.0-150700.53.40.1, 6.4.0-150700.53.78.1
cluster-md-kmp-rt
6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150700.7.40.1, 6.4.0-150700.7.72.1
dlm-kmp-64kb
6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150600.23.100.1
dlm-kmp-azure
6.12.0-160000.29.1, 6.12.0-160000.37.1
dlm-kmp-default
4.12.14-122.302.1, 4.12.14-122.323.1, 5.14.21-150400.24.205.1, 5.14.21-150400.24.235.1, 5.14.21-150500.55.149.1, 5.14.21-150500.55.182.1, 6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150600.23.100.1, 6.4.0-150600.23.130.1, 6.4.0-150700.53.40.1, 6.4.0-150700.53.78.1
dlm-kmp-rt
6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150700.7.40.1, 6.4.0-150700.7.72.1
docker
29.4.2-r0, 29.4.3-r0, 29.7.2_ce-41.1
docker-bash-completion
29.7.2_ce-41.1
docker-buildx
0.36.1-41.1
docker-fish-completion
29.7.2_ce-41.1
docker-rootless-extras
29.7.2_ce-41.1
docker-zsh-completion
29.7.2_ce-41.1
dtb-allwinner
6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150600.23.100.1
dtb-altera
6.12.0-160000.29.1, 6.12.0-160000.37.1, 6.4.0-150600.23.100.1
Timeline
Added to CISA KEV
May 1, 2026
Added to Industry KEV feed
May 1, 2026
Added to CIRCL KEV
May 1, 2026
Added to ENISA EUVD
May 1, 2026
Publicly disclosed
May 25, 2026
Last updated
Oct 15, 2026
Weakness Type
- CWE-669 Incorrect Resource Transfer Between Spheres
- CWE-1288 Improper Validation of Consistency within Input
References
- advisoryRHSA-2026:13565
- advisoryRHSA-2026:13566
- advisoryRHSA-2026:13577
- advisoryRHSA-2026:13578
- advisoryRHSA-2026:13681
FAQ
Common Questions.
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.
Affected: docker (alpine); linux-aws-6.12 (chainguard); linux-azure-6.12 (chainguard), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 1, 2026.
Yes. It was added on May 1, 2026 with a federal remediation due date of May 15, 2026.
Public exploit code is available.
Fixed versions are available, including aws 120.2, aws-5.15 120.2, aws-6.8 120.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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