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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98728: tpm: fix off-by-four bounds check in tpm2_get_random()

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: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 42bb6216b861e892512128219ff23010d656ba14, 9b522400bf5c082feb9a0037a053ea822a2c7e4d, be54101992c2c5218be0e0a87827ccc96e3089af.

Low priority for now. Upgrade to Linux Linux 42bb6216b861e892512128219ff23010d656ba14, 9b522400bf5c082feb9a0037a053ea822a2c7e4d, be54101992c2c5218be0e0a87827ccc96e3089af 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: tpm: fix off-by-four bounds check in tpm2_get_random() When the response carries the TPM2_ST_SESSIONS tag, tpm2_get_random() skips the 4-byte parameter size field before locating the random data, but the bounds check still validates the response length against TPM_HEADER_SIZE. A truncated response can pass the check and make memcpy() read up to 4 bytes past the response end, so stale buffer contents end up in the caller's random bytes. Fix this by checking the response length against 'offset', which already includes the skipped parameter size field.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 19, 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%

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  • No public exploit code on record
  • A fix has been released

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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.

—

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

    • 6.10affected
    • 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 and later · before be54101992c2c5218be0e0a87827ccc96e3089afaffected · git
    • 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 and later · before e30a2406408d2df6d9cd48c2e59e913cf266a05aaffected · git
    • 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 and later · before 42bb6216b861e892512128219ff23010d656ba14affected · git
    • 1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497 and later · before 9b522400bf5c082feb9a0037a053ea822a2c7e4daffected · git
    • before 6.10not affected · semver
    • 6.12.113 and later · up to and including 6.12.*not affected · semver
    • 6.18.56 and later · up to and including 6.18.*not affected · semver
    • 7.2.10 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.

EcosystemPackageAffected rangeFix
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

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-2026-98726Oct 18, 2026 · nvme-multipath: fix underflow in ANA log bounds checks
    0Monitor
  • ← EarlierCVE-2026-98727Oct 18, 2026 · nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
    0Monitor
  • Later →CVE-2026-98729Oct 18, 2026 · x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h
    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 Linux42bb6216b861e892512128219ff23010d656ba14Vendor (CNA)
Linux Linux9b522400bf5c082feb9a0037a053ea822a2c7e4dVendor (CNA)
Linux Linuxbe54101992c2c5218be0e0a87827ccc96e3089afVendor (CNA)
Linux Linuxe30a2406408d2df6d9cd48c2e59e913cf266a05aVendor (CNA)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 8, 2026+20 d
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. Exploit maturity— → none
  2. Fix✗ → ✓

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

References

Show all references (3 more)

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

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