ksmbd: Fix dangling pointer in krb_authenticate
Summary
| CVE | CVE-2025-37778 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-05-01 14:15:41 UTC |
| Updated | 2026-04-18 09:16:09 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-416
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf b61f04d5d73c53d183019bafe22fb700a739bac5 git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf d5b554bc8d554ed6ddf443d3db2fad9f665cec10 git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf 1db2451de23e98bc864c6a6e52aa0d82c91cb325 git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf 6e30c0e10210c714f3d4453dc258d4abcc70364e git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf e83e39a5f6a01a81411a4558a59a10f87aa88dd6 git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf 1e440d5b25b7efccb3defe542a73c51005799a5f git | Not specified |
| CNA | Linux | Linux | affected 5.15 | Not specified |
| CNA | Linux | Linux | unaffected 5.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.203 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.135 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.88 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.25 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.14.4 6.14.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.15 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| lists.debian.org/debian-lts-announce/2025/05/msg00045.html | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Mailing List, Third Party Advisory |
| git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.