NVD / CVE Program· CNA Linux

CVE-2026-98143: accel: ethosu: Don't read the U65 rounding mode as a storage mode

Noroxi assessment

Priority: Monitor (action score 31/100)

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: 0.11% (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 6b08adbda8ea797849e3654ce12cb3856ce6051a, db9deec5a345abc538d081fb221dc0b00a9695bd.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 6b08adbda8ea797849e3654ce12cb3856ce6051a, db9deec5a345abc538d081fb221dc0b00a9695bd 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: accel: ethosu: Don't read the U65 rounding mode as a storage mode Bits 15:14 of NPU_SET_{IFM,OFM}_PRECISION select the activation storage mode on U85 only. On U65 the same field holds the rounding mode, and the command stream parser has read it as a storage mode since the driver was added. That went unnoticed while unknown values fell through the switch, but now that they are rejected, every U65 command stream that asks for natural rounding (2) fails CMDSTREAM_BO_CREATE with -EINVAL. Mesa emits it for average pooling, concatenation, split, unpack, strided slice, LUT and argmax, which is 72 failures of the Teflon test suite on an i.MX93. Truncating rounding (1) is misread as well: it picks the two-tile address path and computes a bogus feature map size from tile bases the command stream never set. Read the field as a storage mode only on the hardware where it is one.

HighCVSS 7.8 · v3.1—No exploit Fix available

EUVD-2026-86974

Published: Sep 25, 2026
Updated: Oct 26, 2026
EPSS: 0.1% · 1th percentile
CWE: CWE-681

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CNA vs NVD score

NVD: —
CNA · Linux: 7.8; NVD has not scored this yet; the score shown is the CNA’s.

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

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No public exploit code on record
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Noroxi analysis

What does it mean in your environment?

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

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

linux linux kernel6.19 and later · before 7.2.7
linux linux kernel7.3

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
- 6.19affected
- 5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b and later · before 6b08adbda8ea797849e3654ce12cb3856ce6051aaffected · git
- 5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b and later · before db9deec5a345abc538d081fb221dc0b00a9695bdaffected · git
- before 6.19not affected · semver
- 7.2.7 and later · up to and including 7.2.*not affected · semver
- 7.3 and laternot affected · original_commit_for_fix

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:14	linux	before 7.2.7-1	7.2.7-1

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
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CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
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Published before and after this one in the same product

← EarlierCVE-2026-98141Sep 25, 2026 · ntfs: propagate reparse index insertion failure
22Monitor
← EarlierCVE-2026-98142Sep 25, 2026 · drm/cirrus-qemu: Validate BAR0 size during probe
22Monitor
Later →CVE-2026-98144Sep 25, 2026 · accel/amdxdna: put the chained BO when its mapping fails
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	6b08adbda8ea797849e3654ce12cb3856ce6051a	Vendor (CNA)
Linux Linux	db9deec5a345abc538d081fb221dc0b00a9695bd	Vendor (CNA)
debian:linux	7.2.7-1 · Debian:14	Package 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.

CVE-2026-5305393 days apartiommu/amd: Fix clone_alias() to use the original device's devid
35Monitor
CVE-2026-6392668 days apartbpf: sockmap: fix tail fragment offset in bpf_msg_push_data
33Monitor
CVE-2026-5313392 days apartRDMA/umem: Fix truncation for block sizes >= 4G
31Monitor
CVE-2026-980490 days apartbpf: zero extend the result of an arena 32-bit cmpxchg
22Monitor
CVE-2026-980950 days apartaf_packet: Don't cast tpacket_hdr.tp_len to int in tpacket_parse_header().
22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).