Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-68434: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms

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 1096397c31f6bffa95e77bdd18fbca085be83e10, 4ea933a36a14bec19b71025cdd8407bafbd67ec1, 5.10.266.

Low priority for now. Upgrade to Linux Linux 1096397c31f6bffa95e77bdd18fbca085be83e10, 4ea933a36a14bec19b71025cdd8407bafbd67ec1, 5.10.266 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: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform. Fix this by adding the missing NULL checks before calling the setup and exit callbacks.

—No exploit Fix available
Published
Aug 11, 2026
Updated
Aug 23, 2026
EPSS
0.1% · 6th 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%

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-2026-68434

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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

    • 763d61ded752fbb3116efc951eff4363f237b7e0 and later · before bdaa8871b53fe9b1730ef64dda2fcd662fd83339affected · git
    • c7d190bb07bf4e3b217c69370e94d1b4c80a40ad and later · before f85a42fb90399dedcf81c146d09c07e4548b1e8caffected · git
    • 0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c and later · before 4ea933a36a14bec19b71025cdd8407bafbd67ec1affected · git
    • 587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6 and later · before 1096397c31f6bffa95e77bdd18fbca085be83e10affected · git
    • 977855894bca4b87afa50d21e3f3e85a5a0e901f and later · before 600dcd548fb2b00a69f447684f52ba45d5a3540eaffected · git
    • 1cd54e217c6e2cdb794a897b2f855e13ffcee586 and later · before b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56affected · git
    • 9690e8a342632344984af72bc56b7a1fba61e6cb and later · before 8cbad52ccfa6a7f089cfab34979bc6cc3bff25beaffected · git
    • b1b4efea05a56c0995e4702a86d6624b4fdff32f and later · before 7fb13fd7e9a59a37cd911efff83abe19e3ee029daffected · git
    • 5.10.261 and later · before 5.10.266affected · semver
    • 5.15.212 and later · before 5.15.217affected · 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 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

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-2026-68430Aug 11, 2026 · drm/amdgpu/gfx8: drop unecessary BUG_ON()
    0Monitor
  • ← EarlierCVE-2026-68431Aug 11, 2026 · ksmbd: validate minimum PDU size for transform requests
    36Monitor
  • Later →CVE-2026-68437Aug 11, 2026 · drm/imagination: Fit paired fragment job in the correct CCCB
    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 Linux1096397c31f6bffa95e77bdd18fbca085be83e10Vendor (CNA)
Linux Linux4ea933a36a14bec19b71025cdd8407bafbd67ec1Vendor (CNA)
Linux Linux5.10.266Vendor (CNA)
Linux Linux5.15.217Vendor (CNA)
Linux Linux6.1.183Vendor (CNA)
Linux Linux6.12.101Vendor (CNA)
Linux Linux6.18.42Vendor (CNA)
Linux Linux6.6.148Vendor (CNA)
Linux Linux600dcd548fb2b00a69f447684f52ba45d5a3540eVendor (CNA)
Linux Linux7.1.6Vendor (CNA)
Linux Linux7fb13fd7e9a59a37cd911efff83abe19e3ee029dVendor (CNA)
Linux Linux8cbad52ccfa6a7f089cfab34979bc6cc3bff25beVendor (CNA)
Linux Linuxb2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56Vendor (CNA)
Linux Linuxbdaa8871b53fe9b1730ef64dda2fcd662fd83339Vendor (CNA)
Linux Linuxf85a42fb90399dedcf81c146d09c07e4548b1e8cVendor (CNA)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~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).

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