CVE-2025-37778ksmbd: Fix dangling pointer in krb_authenticate
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 0626e6641f6b467447c81dd7678a69c66f7746cf before b61f04d5d73c53d183019bafe22fb700a739bac5; from 0626e6641f6b467447c81dd7678a69c66f7746cf before d5b554bc8d554ed6ddf443d3db2fad9f665cec10; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 1db2451de23e98bc864c6a6e52aa0d82c91cb325; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 6e30c0e10210c714f3d4453dc258d4abcc70364e; from 0626e6641f6b467447c81dd7678a69c66f7746cf before e83e39a5f6a01a81411a4558a59a10f87aa88dd6; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 1e440d5b25b7efccb3defe542a73c51005799a5f | CNA record |
linux linux_kernel linux:linux_kernel | from 5.15 before 6.1.135; from 6.2 before 6.6.88; from 6.7 before 6.12.25; from 6.13 before 6.14.4; 6.15; 6.15 | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5
- https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10patch
- https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325patch
- https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364epatch
- https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6patch
- https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5fpatch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlmailing-list, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.