TI-2025-25131 Aliases CVE-2025-37778 GHSA-45gw-fx24-h4pv

ksmbd: Fix dangling pointer in krb_authenticate

MEDIUM 51CWE-416Published 2025-05-01 · Updated 2026-10-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix dangling pointer in krb_authenticate krb_authenticate frees sess->user and does not set the pointer to NULL. It calls ksmbd_krb5_authenticate to reinitialise sess->user but that function may return without doing so. If that happens then smb2_sess_setup, which calls krb_authenticate, will be accessing free'd memory when it later uses sess->user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01161 67th percentileScored 2026-11-07

Fix Fixed Linux (Linux): 5.15.203, 6.1.135, 6.6.88 +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	5.15 and later	5.15.203, 6.1.135, 6.6.88, 6.12.25, 6.14.4, 6.15	Patch available	CNA

Linux VendorLinux Affected 5.15 and later Fixed in 5.15.203, 6.1.135, 6.6.88, 6.12.25, 6.14.4, 6.15 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	5.15 to before 6.1.135; 6.2 to before 6.6.88; 6.7 to before 6.12.25; 6.13 to before 6.14.4	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.15:rc1::::::	6.15 rc1	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.15:rc2::::::	6.15 rc2	Vulnerable	Linux
cpe:2.3:o:debian:debian_linux:11.0:::::::*	11.0	Vulnerable	Debian

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15 to before 6.1.135; 6.2 to before 6.6.88; 6.7 to before 6.12.25; 6.13 to before 6.14.4 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* Versions 6.15 rc1 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* Versions 6.15 rc2 Vulnerable ·Linux
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

Fix · CNA Linux (Linux) Fixed in 5.15.203, 6.1.135, 6.6.88, 6.12.25, 6.14.4, 6.15

Vendor assessments

Red Hat

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

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2025-37778
2026-10-03 Alias added: GHSA-45gw-fx24-h4pv
2026-10-16 CISA SSVC decision points changed
2026-11-07 Affected versions changed · Red Hat

References

Patch 5

Advisory 1

https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Other 1

https://git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5

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-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
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

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