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Back to active CVEs
High · CVSS 7.8CVE-2025-38179

smb: client: fix max_sge overflow in smb_extract_folioq_to_rdma()CVE-2025-38179

Answer in brief

CVE-2025-38179 records a High severity (CVSS 7.8) vulnerability in smb: client: fix max_sge overflow in smb_extract_folioq_to_rdma(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 4, 2025Updated Aug 5, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=c45ebd636c32d33c75e51ce977520ff146bd41a1 <8ae7814589d7bd850294ac14ec4c1725dafd42ca || >=c45ebd636c32d33c75e51ce977520ff146bd41a1 <e0ba9b2f188166550296005e64b15e80db82ad8a || >=c45ebd636c32d33c75e51ce977520ff146bd41a1 <a379a8a2a0032e12e7ef397197c9c2ad011588d68ae7814589d7bd850294ac14ec4c1725dafd42ca, e0ba9b2f188166550296005e64b15e80db82ad8a, a379a8a2a0032e12e7ef397197c9c2ad011588d6
Linux/Linuxgeneric6.12Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 8ae7814589d7bd850294ac14ec4c1725dafd42ca if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jul 4, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

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] <TASK> [ 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+0x10/0x10 [cifs] [ 750.348741] [ T9870] ? update_stack_state+0x2a0/0x670 [ 750.348749] [ T9870] ? cifs_flush+0x153/0x320 [cifs] [ 750.348870] [ T9870] ? cifs_flush+0x153/0x320 [cifs] [ 750.348990] [ T9870] ? update_stack_state+0x2a0/0x670 [ 750.348995] [ T9870] smbd_send+0x58c/0x9c0 [cifs] [ 750.349117] [ T9870] ? __pfx_smbd_send+0x10/0x10 [cifs] [ 750.349231] [ T9870] ? unwind_get_return_address+0x65/0xb0 [ 750.349235] [ T9870] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 750.349242] [ T9870] ? arch_stack_walk+0xa7/0x100 [ 750.349250] [ T9870] ? stack_trace_save+0x92/0xd0 [ 750.349254] [ T9870] __smb_send_rqst+0x931/0xec0 [cifs] [ 750.349374] [ T9870] ? kernel_text_address+0x173/0x190 [ 750.349379] [ T9870] ? kasan_save_stack+0x39/0x70 [ 750.349382] [ T9870] ? kasan_save_track+0x18/0x70 [ 750.349385] [ T9870] ? __kasan_slab_alloc+0x9d/0xa0 [ 750.349389] [ T9870] ? __pfx___smb_send_rqst+0x10/0x10 [cifs] [ 750.349508] [ T9870] ? smb2_mid_entry_alloc+0xb4/0x7e0 [cifs] [ 750.349626] [ T9870] ? cifs_call_async+0x277/0xb00 [cifs] [ 750.349746] [ T9870] ? cifs_issue_write+0x256/0x610 [cifs] [ 750.349867] [ T9870] ? netfs_do_issue_write+0xc2/0x340 [netfs] [ 750.349900] [ T9870] ? netfs_advance_write+0x45b/0x1270 [netfs] [ 750.349929] [ T9870] ? netfs_write_folio+0xd6c/0x1be0 [netfs] [ 750.349958] [ T9870] ? netfs_writepages+0x2e9/0xa80 [netfs] [ 750.349987] [ T9870] ? do_writepages+0x21f/0x590 [ 750.349993] [ T9870] ? filemap_fdatawrite_wbc+0xe1/0x140 [ 750.349997] [ T9870] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 750.350002] [ T9870] smb_send_rqst+0x22e/0x2f0 [cifs] [ 750.350131] [ T9870] ? __pfx_smb_send_rqst+0x10/0x10 [cifs] [ 750.350255] [ T9870] ? local_clock_noinstr+0xe/0xd0 [ 750.350261] [ T9870] ? kasan_save_alloc_info+0x37/0x60 [ 750.350268] [ T9870] ? __kasan_check_write+0x14/0x30 [ 750.350271] [ T9870] ? _raw_spin_lock+0x81/0xf0 [ 750.350275] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10 [ 750.350278] [ T9870] ? smb2_setup_async_request+0x293/0x580 [cifs] [ 750.350398] [ T9870] cifs_call_async+0x477/0xb00 [cifs] [ 750.350518] [ T9870] ? __pfx_smb2_writev_callback+0x10/0x10 [cifs] [ 750.350636] [ T9870] ? __pfx_cifs_call_async+0x10/0x10 [cifs] [ 750.350756] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10 [ 750.350760] [ T9870] ? __kasan_check_write+0x14/0x30 [ 750.350763] [ T98 ---truncated---

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Nov 4, 2026
References
3 linked sources
Open source record