dmaengine: idxd: Remove improper idxd_free (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.15 % · percentile 4 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Remove improper idxd_free The call to idxd_free() introduces a duplicate put_device() leading to a reference count underflow: refcount_t: underflow; use-after-free. WARNING: CPU: 15 PID: 4428 at lib/refcount.c:28 refcount_warn_saturate+0xbe/0x110 ... Call Trace: <TASK> idxd_remove+0xe4/0x120 [idxd] pci_device_remove+0x3f/0xb0 device_release_driver_internal+0x197/0x200 driver_detach+0x48/0x90 bus_remove_driver+0x74/0xf0 pci_unregister_driver+0x2e/0xb0 idxd_exit_module+0x34/0x7a0 [idxd] __do_sys_delete_module.constprop.0+0x183/0x280 do_syscall_64+0x54/0xd70 entry_SYSCALL_64_after_hwframe+0x76/0x7e The idxd_unregister_devices() which is invoked at the very beginning of idxd_remove(), already takes care of the necessary put_device() through the following call path: idxd_unregister_devices() -> device_unregister() -> put_device() In addition, when CONFIG_DEBUG_KOBJECT_RELEASE is enabled, put_device() may trigger asynchronous cleanup via schedule_delayed_work(). If idxd_free() is called immediately after, it can result in a use-after-free. Remove the improper idxd_free() to avoid both the refcount underflow and potential memory corruption during module unload.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/24414bbcb37e1af95190af36c21ae51d497e1a9e
- https://git.kernel.org/stable/c/0e95ee7f532b21206fe3f1c4054002b0d21e3b9c
- https://git.kernel.org/stable/c/dd7a7e43269711d757fc260b0bbdf7138f75de11
- https://git.kernel.org/stable/c/da4fbc1488a4cec6748da685181ee4449a878dac
- https://git.kernel.org/stable/c/f41c538881eec4dcf5961a242097d447f848cda6
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2025-30862
- GCVE · GCVE-0-2025-39871
CERT-FR advisories
- CERTFR-2026-AVI-1298 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0880 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0602 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0421 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0397 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0371 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0331 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0167 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0166 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1073 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1032 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1009 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0921 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0895 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.1.140 < 6.2cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.6.92 < 6.6.107cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.12.30 < 6.12.48cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.14.8 < 6.15cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.15.1 < 6.16.8cpe:2.3:o:linux:linux_kernel:6.15:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 68ac5a01f635b3791196fd1c39bc48497252c36f < 24414bbcb37e1af95190af36c21ae51d497e1a9e ; affected d2d05fd0fc95c4defed6f7b87550e20e8baa1d97 < 0e95ee7f532b21206fe3f1c4054002b0d21e3b9c ; affected 21f9f5cd9a0c75084d4369ba0b8c4f695c41dea7 < dd7a7e43269711d757fc260b0bbdf7138f75de11 ; affected d5449ff1b04dfe9ed8e455769aa01e4c2ccf6805 < da4fbc1488a4cec6748da685181ee4449a878dac ; affected d5449ff1b04dfe9ed8e455769aa01e4c2ccf6805 < f41c538881eec4dcf5961a242097d447f848cda6 ; affected 2b7a961cea0e5b65afda911f76d14fec5c98d024 |
| Linux · Linux | affected 6.15 ; unaffected 0 < 6.15 ; unaffected 6.1.160 ≤ 6.1.* ; unaffected 6.6.107 ≤ 6.6.* ; unaffected 6.12.48 ≤ 6.12.* ; unaffected 6.16.8 ≤ 6.16.* |
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 |