TI-2026-75856 Aliases CVE-2026-98728 GHSA-m4p2-cqr5-x7cx

Off-by-four bounds check in Linux kernel TPM random bytes

LOW 22Published 2026-10-18 · Updated 2026-10-19

Key facts

Attack vector: —
Privileges required: —
User interaction: —
Attack complexity: —
Impact type: —
Confidentiality · integrity · availability: —
Fix status: Partial Red Hat: 2 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

Linux kernel versions from 6.10 contain a bounds check error in tpm2_get_random() that validates the response length against the wrong header size. When a response carries the sessions tag, the parameter size field is skipped, so a truncated response can pass the check and make memcpy() read up to 4 bytes past the response end. Stale buffer contents then end up in the random bytes returned to the caller.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

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.

Why it matters now

EPSS 0.00168 6th percentileScored 2026-11-07

Fix Partial Linux (Linux): 6.12.113, 6.18.56, 7.2.10 +1Red Hat: 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.10 and later	6.12.113, 6.18.56, 7.2.10, 7.3	Patch available	CNA

Linux VendorLinux Affected 6.10 and later Fixed in 6.12.113, 6.18.56, 7.2.10, 7.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	—	—	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

The Linux kernel is fixed in 6.12.113, 6.18.56, 7.2.10 and 7.3. Red Hat Enterprise Linux 10 has no fix available and Red Hat Enterprise Linux 6 has no fix planned.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Fix · CNA Linux (Linux) Fixed in 6.12.113, 6.18.56, 7.2.10, 7.3

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope

Not affected: 5 products

Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat OpenShift Container Platform 4
Red Hat OpenShift Container Platform 5

Timeline

2026-10-18 Threatist record created from CVE-2026-98728
2026-10-18 Alias added: GHSA-m4p2-cqr5-x7cx
2026-10-19 Fix available: Linux/[email protected] · CNA
2026-10-23 Affected versions changed · Red Hat
2026-10-23 CVSS score added · Red Hat
2026-11-07 Affected versions changed · Red Hat

References

Other 4

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4

See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences