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NVD / CVE Program· CNA Linux

CVE-2026-52972: crypto: af_alg - Cap AEAD AD length to 0x80000000

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • 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.
  • Fixed version: Linux Linux 0b3a57d218618cb1cc78ddc9ba02c07de84b46f4, 265ac26d1c5e17b34d497cbda1f754a1ec8552bc, 97948906dc8e0ea84775e03e35b60a2063c70193; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0b3a57d218618cb1cc78ddc9ba02c07de84b46f4, 265ac26d1c5e17b34d497cbda1f754a1ec8552bc, 97948906dc8e0ea84775e03e35b60a2063c70193; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Cap AEAD AD length to 0x80000000 In order to prevent arithmetic overflows when checking the TX buffer size, cap the associated data length to 0x80000000.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 24, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.0
1.5 point gap

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

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

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-52972

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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 kernel4.1 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
  • linux linux kernel7.1 and later · before 7.2

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

    • 4.1affected
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before f8a5203596797f394ff3f9aa4005597a92249802affected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before a9f68d9ed38dd6e5a6c6d75b03d25c1c133e321daffected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before a4fe4eb580bbc7439f649a496d4cf38415a4021caffected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before e4c4a5074532eaaa14951994a3aad0d479aa7431affected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before 265ac26d1c5e17b34d497cbda1f754a1ec8552bcaffected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before a1c5672faf8e93e38c2deac3979cc767ca5cf918affected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before 97948906dc8e0ea84775e03e35b60a2063c70193affected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before 0b3a57d218618cb1cc78ddc9ba02c07de84b46f4affected · git
    • 400c40cf78da00c16e561a3a253ca272455c42ef and later · before e4c06479d7059888adf2f22bc1ebcf053bf691a2affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.63.1.el10_26.12.0-211.63.1.el10_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-52970Jun 24, 2026 · netfilter: nft_ct: fix missing expect put in obj eval
    22Monitor
  • ← EarlierCVE-2026-52971Jun 24, 2026 · net: ena: PHC: Fix potential use-after-free in get_timestamp
    31Monitor
  • Later →CVE-2026-52973Jun 24, 2026 · futex: Drop CLONE_THREAD requirement for private default hash alloc
    31Monitor

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 Linux0b3a57d218618cb1cc78ddc9ba02c07de84b46f4Vendor (CNA)
Linux Linux265ac26d1c5e17b34d497cbda1f754a1ec8552bcVendor (CNA)
Linux Linux97948906dc8e0ea84775e03e35b60a2063c70193Vendor (CNA)
Linux Linuxa1c5672faf8e93e38c2deac3979cc767ca5cf918Vendor (CNA)
Linux Linuxa4fe4eb580bbc7439f649a496d4cf38415a4021cVendor (CNA)
Linux Linuxa9f68d9ed38dd6e5a6c6d75b03d25c1c133e321dVendor (CNA)
Linux Linuxe4c06479d7059888adf2f22bc1ebcf053bf691a2Vendor (CNA)
Linux Linuxe4c4a5074532eaaa14951994a3aad0d479aa7431Vendor (CNA)
Linux Linuxf8a5203596797f394ff3f9aa4005597a92249802Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.143.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.53.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
opensuse:kernel-source7.1.7-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-687.53.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-687.53.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-687.53.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-687.53.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-687.53.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-687.53.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+20

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.

No history yet (it accumulates with the daily EPSS job).

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.

Credits

All researchers

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.

  • CVE-2026-4632515 days apartRDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE
    39Monitor
  • CVE-2026-4603928 days apartrxgk: Fix potential integer overflow in length check
    39Monitor
  • CVE-2026-4334147 days apartnet/ipv6: ioam6: prevent schema length wraparound in trace fill
    39Monitor
  • CVE-2026-3163361 days apartrxrpc: Fix integer overflow in rxgk_verify_response()
    39Monitor
  • CVE-2026-3164961 days apartnet: stmmac: fix integer underflow in chain mode
    39Monitor
  • CVE-2026-3165961 days apartbatman-adv: reject oversized global TT response buffers
    39Monitor

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

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

nvd-primary

Attack context

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

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (11 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records