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.
Affected products
linux: linux kernel; debian: debian linux
References7
- git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325 Patch
- git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f Patch
- git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e Patch
- git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10 Patch
- git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6 Patch
- git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5
- lists.debian.org/debian-lts-announce/2025/05/msg00045.html Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 67 · as of 7 November 2026
- CWE
- CWE-416
Could this be exploited in your environment?
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