CVE-2025-37778
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.09% probability · 64th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325Patch
- https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5fPatch
- https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364ePatch
- https://git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5
- https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10Patch
- https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlMailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.