CVE-2025-37778

Advisory lineage Upstream: 0 Downstream: 24
Modified
Published: 01 May 2025, 13:07
Last modified:11 May 2026, 21:14

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.48% LOW
0% probability +0.41%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 May 2025, 13:07
Published
Vulnerability first disclosed
11 May 2026, 21:14
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.48%• Percentile: 38%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < b61f04d5d73c53d183019bafe22fb700a739bac5 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < d5b554bc8d554ed6ddf443d3db2fad9f665cec10 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 1db2451de23e98bc864c6a6e52aa0d82c91cb325 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 6e30c0e10210c714f3d4453dc258d4abcc70364e | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < e83e39a5f6a01a81411a4558a59a10f87aa88dd6 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 1e440d5b25b7efccb3defe542a73c51005799a5f | 5.15

  • linux•linux kernel

    ≥ 5.15, < 6.1.135 | ≥ 6.2, < 6.6.88 | ≥ 6.7, < 6.12.25 | ≥ 6.13, < 6.14.4 | 6.15:rc1 | 6.15:rc2

References (7)