CVE-2025-39964

Katalog CVE

CVSS 5.5 · Medium KEV · sudah dieksploitasi EPSS 1,3%

Kerentanan Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') pada linux kernel, siemens simatic s7-1500 cpu 1518-4 pn/dp mfp firmware +1 lainnya. Skor CVSS 3.1 5.5 (Medium) menurut NVD. Masuk katalog KEV CISA pada 18 September 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may create inconsistencies in the internal socket state. Disallow this by adding a new ctx->write field that indiciates exclusive ownership for writing.

Advisory KUTIM-CSIRT

• Peringatan Keamanan: 5 Kerentanan Kernel Linux Dieksploitasi Aktif, Masuk Katalog KEV CISA 19 Sep 2026

Rincian

Terbit di NVD

13 Oktober 2025

Terakhir diubah

19 September 2026

Status NVD

Analyzed

CVSS 3.1

5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

EPSS (30 hari)

1,3% peluang dieksploitasi; lebih tinggi dari 69,2% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Linux Kernel Race Condition Vulnerability

Masuk KEV

18 September 2026

Tenggat CISA

21 September 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce patch
• https://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285 patch
• https://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8 patch
• https://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042 patch
• https://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84 patch
• https://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d patch
• https://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9 patch
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39964 pemerintah AS
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html advisory pihak ketiga