Out-of-Bounds Write in Linux kernel (CVE-2025-38179)
Summary
Out-of-bounds write in Linux kernel (CVE-2025-38179). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix max_sge overflow in smb_extract_folioq_to_rdma()
This fixes the following problem:
[ 749.901015] [ T8673] run fstests cifs/001 at 2025-06-17 09:40:30
[ 750.346409] [ T9870] ==================================================================
[ 750.346814] [ T9870] BUG: KASAN: slab-out-of-bounds in smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.347330] [ T9870] Write of size 8 at addr ffff888011082890 by task xfs_io/9870
[ 750.347705] [ T9870]
[ 750.348077] [ T9870] CPU: 0 UID: 0 PID: 9870 Comm: xfs_io Kdump: loaded Not tainted 6.16.0-rc2-metze.02+ #1 PREEMPT(voluntary)
[ 750.348082] [ T9870] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 750.348085] [ T9870] Call Trace:
[ 750.348086] [ T9870]
[ 750.348088] [ T9870] dump_stack_lvl+0x76/0xa0
[ 750.348106] [ T9870] print_report+0xd1/0x640
[ 750.348116] [ T9870] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 750.348120] [ T9870] ? kasan_complete_mode_report_info+0x26/0x210
[ 750.348124] [ T9870] kasan_report+0xe7/0x130
[ 750.348128] [ T9870] ? smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.348262] [ T9870] ? smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.348377] [ T9870] __asan_report_store8_noabort+0x17/0x30
[ 750.348381] [ T9870] smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.348496] [ T9870] smbd_post_send_iter+0x1990/0x3070 [cifs]
[ 750.348625] [ T9870] ? __pfx_smbd_post_send_iter…
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2025-38179 has been found in Linux kernel.
Successful exploitation can lead to full system takeover. CVSS score: 7.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2025-38179" on the vendor's site.
CVE-2025-38179 (Linux kernel) — CWE-787 / CVSS v3 7.8
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Out-of-bounds write (CWE-787) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: High (CVSS 7.8/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- BellSoft Alpaquita BELL-CVE-2025-38179 linux-lts Fixed in: 6.12.41-r0
- Debian DEBIAN-CVE-2025-38179 linux Fixed in: 6.12.35-1
- Ubuntu UBUNTU-CVE-2025-38179 linux-hwe-edge
References
- advisory github.com
- advisory nvd.nist.gov
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org