CVE-2026-64385
smb: client: fix double-free in SMB2_ioctl() replay
CRITICAL 9.8
At a glance
- Source
- NVD
- EPSS
- EPSS 0.46 % · percentile 40 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
Weaknesses (CWE)
- CWE-415 — Double Free
References
- https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6
- https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6
- https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3b
- https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72
- https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-48929
- GCVE · GCVE-0-2026-64385
CERT-FR advisories
- CERTFR-2026-AVI-1334 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1255 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1252 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1203 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1202 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1164 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1162 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1031 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.6.32 < 6.6.145cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.8.1 < 6.12.96cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.18.39cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19 < 7.1.4cpe:2.3:o:linux:linux_kernel:6.8:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 433042a91f9373241307725b52de573933ffedbf < 0be4bc64882edaefaaee8d1e27d083643eb778e6 ; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e < 96fcfc8ae7359346156e492ca610e830d2649ad6 ; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e < 276c8efbc49f9303ac76d0d4deab7128581b0f3b ; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e < fc65ffb4ef1bf540da16b17c225ae51091e07d72 ; affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e < f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9 ; affected 6.6.32 < 6.6.145 |
| Linux · Linux | affected 6.8 ; unaffected 0 < 6.8 ; unaffected 6.6.145 ≤ 6.6.* ; unaffected 6.12.96 ≤ 6.12.* ; unaffected 6.18.39 ≤ 6.18.* ; unaffected 7.1.4 ≤ 7.1.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |