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CVE-2026-53016· NVD / CVE Program· CNA Linux

crypto: ccp - copy IV using skcipher ivsize

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver. ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV buffer while RFC3686 skciphers expose an 8-byte IV, so the restore overruns the provided buffer. Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jun 24, 2026
Updated
Sep 16, 2026
EPSS
0.2% · 8th percentile
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Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

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Affected systems

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.14 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.141
  • linux linux kernel6.7 and later · before 6.12.91
  • linux linux kernel6.13 and later · before 6.18.33
  • linux linux kernel6.19 and later · before 7.0.10

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.14affected
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before 939061b2d0f7f15114e34b4ce878ef50ff4089c3affected · git
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before 798d409a8949f3f495f238549b86de2886b129bdaffected · git
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before dfb2cf434829819268fe50f41542aad318ad62b2affected · git
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before eecee15e263ccb8cd77170a56ab6c969cb54dd6aaffected · git
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before bb01d8f1f385bc9034ca114d3508c7fdea24fc9aaffected · git
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before df9784bb5b637ac80f4a2768a58ca9a50bef28a9affected · git
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before 227c1e1d9e2aa4cfc65ba446d5690da1f546cda4affected · git
    • 2b789435d7f36ed918d92db647f3a2f3fec9bb1f and later · before a7a1f3cdd64d8a165d9b8c9e9ad7fb46ac19dfc4affected · git
    • before 3.14not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.34.1.el10_26.12.0-211.34.1.el10_2

+96

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux227c1e1d9e2aa4cfc65ba446d5690da1f546cda4Vendor (CNA)
Linux Linux798d409a8949f3f495f238549b86de2886b129bdVendor (CNA)
Linux Linux939061b2d0f7f15114e34b4ce878ef50ff4089c3Vendor (CNA)
Linux Linuxa7a1f3cdd64d8a165d9b8c9e9ad7fb46ac19dfc4Vendor (CNA)
Linux Linuxbb01d8f1f385bc9034ca114d3508c7fdea24fc9aVendor (CNA)
Linux Linuxdf9784bb5b637ac80f4a2768a58ca9a50bef28a9Vendor (CNA)
Linux Linuxdfb2cf434829819268fe50f41542aad318ad62b2Vendor (CNA)
Linux Linuxeecee15e263ccb8cd77170a56ab6c969cb54dd6aVendor (CNA)
almalinux:kernel5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.25.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-687.25.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+5

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

All records