TI-2023-30055 Aliases CVE-2023-53769 GHSA-3jg5-f6fr-mw89

virt/coco/sev-guest: Double-buffer messages

LOW 39Published 2025-12-08 · Updated 2026-08-05

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 5 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: virt/coco/sev-guest: Double-buffer messages The encryption algorithms read and write directly to shared unencrypted memory, which may leak information as well as permit the host to tamper with the message integrity. Instead, copy whole messages in or out as needed before doing any computation on them.

Why it matters now

EPSS 0.00101 0th percentileScored 2026-11-07

Fix Partial Linux (Linux): 6.1.28, 6.2.15, 6.3.2 +1Red Hat: 2 advisoriesRed Hat: 5 fixed, 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	5.19 and later	6.1.28, 6.2.15, 6.3.2, 6.4	Patch available	CNA

Linux VendorLinux Affected 5.19 and later Fixed in 6.1.28, 6.2.15, 6.3.2, 6.4 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

Fix · CNA Linux (Linux) Fixed in 6.1.28, 6.2.15, 6.3.2, 6.4

Red Hat 2 advisories

RHSA-2023:7077 Released 2023-11-14 · Red Hat rating Important
kernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-513.5.1.el8_9
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-513.5.1.el8_9, kernel-4.18.0-513.5.1.el8_9, kernel-abi-stablelists-4.18.0-513.5.1.el8_9 +19
RHSA-2023:5069 Released 2023-09-12 · Red Hat rating Important
kernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-284.30.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.30.1.el9_2, kernel-64k-devel-5.14.0-284.30.1.el9_2 +10
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.0.0-284.30.1.el9_2, kernel-5.14.0-284.30.1.el9_2, kernel-64k-5.14.0-284.30.1.el9_2 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-284.30.1.el9_2

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred
Red Hat CodeReady Linux Builder (v. 8)	Fixed	RHSA-2023:7077
Red Hat Enterprise Linux AppStream (v. 9)	Fixed	RHSA-2023:5069
Red Hat Enterprise Linux BaseOS (v. 8)	Fixed	RHSA-2023:7077
Red Hat Enterprise Linux BaseOS (v. 9)	Fixed	RHSA-2023:5069
Red Hat Enterprise Linux CRB (v. 9)	Fixed	RHSA-2023:5069

Not affected: 3 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7

Timeline

2026-10-02 Threatist record created from CVE-2023-53769
2026-10-03 Alias added: GHSA-3jg5-f6fr-mw89

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