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NVD / CVE Program· CNA Linux

CVE-2026-74622: net: atlantic: free RX pages of consumed but not refilled buffers

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac, 1e58b0bab40dcbdfc04acaba6a221d40801c3770, 24d87dc28ddd3771dd0e88719209811809729439; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac, 1e58b0bab40dcbdfc04acaba6a221d40801c3770, 24d87dc28ddd3771dd0e88719209811809729439; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 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: net: atlantic: free RX pages of consumed but not refilled buffers aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to hardware. Since the page reuse strategy was added, a cleaned RX buffer keeps its page (and its DMA mapping) in the ring for reuse, and refill is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES slots are free. Slots that were consumed but not yet reposted therefore sit in the complementary [sw_tail, sw_head) gap with a live page, and the deinit walk never visits them: up to a refill batch worth of pages and DMA mappings leak on every interface down. Walk the whole ring instead and release whatever is still there. Also bail out if the buffer ring is already gone: a partial aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so aq_ptp_ring_deinit() still gets here on the unwind path.

—No exploit Fix available
Published
Aug 22, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
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

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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.

—

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

    • 5.2affected
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before 1e58b0bab40dcbdfc04acaba6a221d40801c3770affected · git
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before 30c473ea097ef0c93b064281b3e295c97d17e28baffected · git
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before 17c99dd86f169c7a3e73d6778e79ef5b1ed3ceacaffected · git
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before ff451bc4290b79c04f1c5cfa928d448f9d47ecf5affected · git
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before 64e1346bc66b947eb80b848e4c8d9828ba50e0feaffected · git
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before 782cc40b7ade4614a8aec0b948b8cf95c69f8d4baffected · git
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before 24d87dc28ddd3771dd0e88719209811809729439affected · git
    • 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 and later · before e8e7471ef686b6c002218fee9671cc61992ae01aaffected · git
    • before 5.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.9-17.1.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-74620Aug 22, 2026 · net/sched: act_gact, act_police: range check the fallback control action
    0Monitor
  • ← EarlierCVE-2026-74621Aug 22, 2026 · net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
    30Monitor
  • Later →CVE-2026-74623Aug 22, 2026 · net: atlantic: free stranded TX buffers on ring deinit
    0Monitor

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 Linux17c99dd86f169c7a3e73d6778e79ef5b1ed3ceacVendor (CNA)
Linux Linux1e58b0bab40dcbdfc04acaba6a221d40801c3770Vendor (CNA)
Linux Linux24d87dc28ddd3771dd0e88719209811809729439Vendor (CNA)
Linux Linux30c473ea097ef0c93b064281b3e295c97d17e28bVendor (CNA)
Linux Linux64e1346bc66b947eb80b848e4c8d9828ba50e0feVendor (CNA)
Linux Linux782cc40b7ade4614a8aec0b948b8cf95c69f8d4bVendor (CNA)
Linux Linuxe8e7471ef686b6c002218fee9671cc61992ae01aVendor (CNA)
Linux Linuxff451bc4290b79c04f1c5cfa928d448f9d47ecf5Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · 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.

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.

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.

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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

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

References

Show all references (7 more)

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

All records