CVE-2025-21844
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
5.5
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: Add check for next_buffer in receive_encrypted_standard() Add check for the return value of cifs_buf_get() and cifs_small_buf_get() in receive_encrypted_standard() to prevent null pointer dereference.
Predictions
Exploit likelihood
55%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| rocky | 9 | fixed | |
| debian | bookworm | fixed | 6.1.133-1 |
| debian | bullseye | fixed | 5.10.237-1 |
| debian | forky | fixed | 6.12.17-1 |
| debian | sid | fixed | 6.12.17-1 |
| debian | trixie | fixed | 6.12.17-1 |
| linux-kernel | affected | 6.1.130 | |
| linux-kernel | 5.10.211 | affected | |
| linux-kernel | 5.15.150 | affected | |
| linux-kernel | 6.14 | affected | |
| almalinux | 9 | fixed | kernel-doc-5.14.0-611.5.1.el9_7.noarch.rpm |
References
- https://access.redhat.com/errata/RHSA-2025:20518
- https://git.kernel.org/stable/c/24e8e4523d3071bc5143b0db9127d511489f7b3b
- https://git.kernel.org/stable/c/554736b583f529ee159aa95af9a0cbc12b5ffc96
- https://git.kernel.org/stable/c/860ca5e50f73c2a1cef7eefc9d39d04e275417f7
- https://git.kernel.org/stable/c/9e5d99a4cf2e23c716b44862975548415fae5391
- https://git.kernel.org/stable/c/a9b0b4b29877cb4dc5d0842b59b5ccbacddb85bd
- https://git.kernel.org/stable/c/f277e479eea3d1aa18bc712abe1d2bf3dece2e30
- https://git.kernel.org/stable/c/f618aeb6cad2307e48a641379db610abcf593edf
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://www.suse.com/security/cve/CVE-2025-21844.html
- https://errata.rockylinux.org/RLSA-2025:20518
- https://security-tracker.debian.org/tracker/CVE-2025-21844
- https://bugzilla.redhat.com/2298169
- https://bugzilla.redhat.com/2312077
- https://bugzilla.redhat.com/2313092
- https://bugzilla.redhat.com/2320172
- https://bugzilla.redhat.com/2320259
- https://bugzilla.redhat.com/2320455
- https://bugzilla.redhat.com/2320616
- https://bugzilla.redhat.com/2320722
- https://bugzilla.redhat.com/2324549
- https://bugzilla.redhat.com/2327203
- https://bugzilla.redhat.com/2327374
CWEs
CWE-476
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.