CVE-2025-37778

high

Description

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.

References

https://www.databreachtoday.com/linux-zero-day-vulnerability-discovered-using-frontier-ai-a-28559

https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6

https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10

https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e

https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f

https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325

Details

Source: Mitre, NVD

Published: 2025-05-01

Updated: 2025-05-02

Risk Information

CVSS v2

Base Score: 6.9

Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00018