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NVD / CVE Program· CNA Linux

CVE-2026-93159: crypto: atmel-sha204a - fix heap info leak on I2C transfer failure

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 0d6db386133d9230befb77967bbf130443964860, 28cc179252347718f97045dd5ea74165609dbd7d, 4e76d85e505b7451925efbcd67c015e8c2440c68.

Low priority for now. Upgrade to Linux Linux 0d6db386133d9230befb77967bbf130443964860, 28cc179252347718f97045dd5ea74165609dbd7d, 4e76d85e505b7451925efbcd67c015e8c2440c68 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: crypto: atmel-sha204a - fix heap info leak on I2C transfer failure The nonblocking RNG path allocates a work_data structure to track the state of an in-flight asynchronous I2C request. This pointer is stored in rng->priv and later consumed by the read path once the transaction completes. If the underlying I2C transfer fails, the completion callback is invoked with a non-zero status. In this case, the allocated work_data is not usable for producing RNG output and must not remain associated with the hwrng state. Previously, the failure path only logged a warning but left the pointer state uncleared, which can result in subsequent read attempts observing stale state and interpreting it as valid completion data. Fix this by freeing the pending work_data. The I2C transaction reports an error. This ensures that failed requests do not leave residual state behind that could be interpreted as valid RNG data on later reads. Clearing rng->priv is done at the subsequent call to nonblocking read.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th 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%

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  • A fix has been released

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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

    • 5.3affected
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before a430b5b6d2ddd2b266330f8507a655be1148347daffected · git
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before 4e76d85e505b7451925efbcd67c015e8c2440c68affected · git
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before bcac9052e19490231ff6e0678a06bd2fcf8db3afaffected · git
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before 28cc179252347718f97045dd5ea74165609dbd7daffected · git
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before 0d6db386133d9230befb77967bbf130443964860affected · git
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before f4d347fb1309b69ea6f817a17e6b2893c8d754b7affected · git
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before 94abda77b57a35b82bba0365bad072d94d67ffe9affected · git
    • da001fb651b00e1deeaf24767dd691ae8152a4f5 and later · before 72bbf11ba14bd7d5fbf31a1ec42fff608b657f74affected · git
    • before 5.3not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-93157Sep 17, 2026 · hwrng: xilinx-trng - propagate timeout before any data is read
    0Monitor
  • ← EarlierCVE-2026-93158Sep 17, 2026 · crypto: sa2ul - stop probe if context pool creation fails
    0Monitor
  • Later →CVE-2026-93160Sep 17, 2026 · crypto: atmel-ecc - reject hardware ECDH without a public key
    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 Linux0d6db386133d9230befb77967bbf130443964860Vendor (CNA)
Linux Linux28cc179252347718f97045dd5ea74165609dbd7dVendor (CNA)
Linux Linux4e76d85e505b7451925efbcd67c015e8c2440c68Vendor (CNA)
Linux Linux72bbf11ba14bd7d5fbf31a1ec42fff608b657f74Vendor (CNA)
Linux Linux94abda77b57a35b82bba0365bad072d94d67ffe9Vendor (CNA)
Linux Linuxa430b5b6d2ddd2b266330f8507a655be1148347dVendor (CNA)
Linux Linuxbcac9052e19490231ff6e0678a06bd2fcf8db3afVendor (CNA)
Linux Linuxf4d347fb1309b69ea6f817a17e6b2893c8d754b7Vendor (CNA)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~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✗ → ✓

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References

Show all references (7 more)

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

All records