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CVE-2026-74693· NVD / CVE Program· CNA Linux

net: prestera: validate firmware header length

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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 0fbcceb9d19f2d1dcdf099aee590f2517cb718bb, 363e048a9d0a6c245cbc348c8a220170afed046a, 38a3afbf9fd8a2e8c47fa3ca47b425a8a9623240.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0fbcceb9d19f2d1dcdf099aee590f2517cb718bb, 363e048a9d0a6c245cbc348c8a220170afed046a, 38a3afbf9fd8a2e8c47fa3ca47b425a8a9623240 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: prestera: validate firmware header length prestera_fw_hdr_parse() reads the firmware header before checking that the firmware image contains that header. Reject images shorter than struct prestera_fw_header before decoding the magic and version fields.

—No exploit Fix available
Published
Aug 22, 2026
Updated
Oct 14, 2026
EPSS
0.2% · 11th 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 · 0.2%

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-2026-74693

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.

—

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

    • 5.10affected
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before 38a3afbf9fd8a2e8c47fa3ca47b425a8a9623240affected · git
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before 0fbcceb9d19f2d1dcdf099aee590f2517cb718bbaffected · git
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before e0f382e8084117f0b11ffb070fe1079e38c0d7f9affected · git
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before 6fad06bb793d7089ae05b9fcf46e11be2dfe4850affected · git
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before 470ac9cce7308e60cf2dceb448749cdd006e73deaffected · git
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before 363e048a9d0a6c245cbc348c8a220170afed046aaffected · git
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before 7fa8a12296d8d5aa4b1c3904f0b354d81124cf29affected · git
    • 4c2703dfd7fabb0824b3bc345f9fa47e33248c14 and later · before 8ae344eb540af3f457179b52bc6061416752485caffected · git
    • before 5.10not 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-2026-74691Aug 22, 2026 · net: thunderbolt: Tear down DMA paths before stopping the rings
    35Monitor
  • ← EarlierCVE-2026-74692Aug 22, 2026 · net/smc: fix TOCTOU race between smc_listen_out() and listener close
    30Monitor
  • Later →CVE-2026-74694Aug 22, 2026 · net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length
    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 Linux0fbcceb9d19f2d1dcdf099aee590f2517cb718bbVendor (CNA)
Linux Linux363e048a9d0a6c245cbc348c8a220170afed046aVendor (CNA)
Linux Linux38a3afbf9fd8a2e8c47fa3ca47b425a8a9623240Vendor (CNA)
Linux Linux470ac9cce7308e60cf2dceb448749cdd006e73deVendor (CNA)
Linux Linux6fad06bb793d7089ae05b9fcf46e11be2dfe4850Vendor (CNA)
Linux Linux7fa8a12296d8d5aa4b1c3904f0b354d81124cf29Vendor (CNA)
Linux Linux8ae344eb540af3f457179b52bc6061416752485cVendor (CNA)
Linux Linuxe0f382e8084117f0b11ffb070fe1079e38c0d7f9Vendor (CNA)
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. 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