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NVD / CVE Program· CNA Linux

CVE-2026-52970: netfilter: nft_ct: fix missing expect put in obj eval

MediumCVSS 5.5 · v3.1—No exploit Fix available

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: 0.13% (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 19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4, 1dced0725e2fae3ac3416274db20a7ff5a46931d, 26ab32ec73941871c97562ee1f39587950dc3b68; 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 19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4, 1dced0725e2fae3ac3416274db20a7ff5a46931d, 26ab32ec73941871c97562ee1f39587950dc3b68; 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: netfilter: nft_ct: fix missing expect put in obj eval nft_ct_expect_obj_eval() allocates an expectation and may call nf_ct_expect_related(), but never drops its local reference. Add nf_ct_expect_put(exp) before return to balance allocation.

Published
Jun 24, 2026
Updated
Nov 10, 2026
EPSS
0.1% · 2th percentile
CWE
—

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.

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-2026-52970

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

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

    • 5.3affected
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before cdb9a25dd3416d427e8b2753210f8baf44207577affected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 26ab32ec73941871c97562ee1f39587950dc3b68affected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 7b96242ceedfe249f158419f3254bcee04173ffeaffected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before ecca618e1e339494911090474ed87742c0f73976affected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 2aef1b13d5c0285f340512c6c07eb858fd018fd8affected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 1dced0725e2fae3ac3416274db20a7ff5a46931daffected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 84c422cea5a45fe56be839f25880f21fd33940cdaffected · git
    • 857b46027d6f91150797295752581b7155b9d0e1 and later · before 19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4affected · git
    • before 5.3not affected · semver
Affected versions · NVD (8)

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

  • linux linux kernel5.3 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

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.10-17.0.10-1

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-2026-52967Jun 24, 2026 · smb/client: fix possible infinite loop and oob read in symlink_data()
    32Monitor
  • ← EarlierCVE-2026-52968Jun 24, 2026 · KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic
    28Monitor
  • Later →CVE-2026-52971Jun 24, 2026 · net: ena: PHC: Fix potential use-after-free in get_timestamp
    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 Linux19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4Vendor (CNA)
Linux Linux1dced0725e2fae3ac3416274db20a7ff5a46931dVendor (CNA)
Linux Linux26ab32ec73941871c97562ee1f39587950dc3b68Vendor (CNA)
Linux Linux2aef1b13d5c0285f340512c6c07eb858fd018fd8Vendor (CNA)
Linux Linux7b96242ceedfe249f158419f3254bcee04173ffeVendor (CNA)
Linux Linux84c422cea5a45fe56be839f25880f21fd33940cdVendor (CNA)
Linux Linuxcdb9a25dd3416d427e8b2753210f8baf44207577Vendor (CNA)
Linux Linuxecca618e1e339494911090474ed87742c0f73976Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.143.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)

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.

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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)

—

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.

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

References

Show all references (9 more)

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

All records