USN-8662-1: Linux kernel vulnerabilities
Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - Cryptographic API; - InfiniBand drivers; - Media drivers; - STMicroelectronics network drivers; - Network drivers; - Ext4 file system; - IPv4 networking; - TCP network protocol; - Locking primitives; - Ceph Core library; - IPv6 networking; - Multipath TCP; - Netfilter; - SCTP protocol; - SMC sockets; (CVE-2026-31405, CVE-2026-31414, CVE-2026-31448, CVE-2026-31649, CVE-2026-43198, CVE-2026-43493, CVE-2026-43499, CVE-2026-46266, CVE-2026-52955, CVE-2026-52982, CVE-2026-52986, CVE-2026-53006, CVE-2026-53176, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359)
CSIRTS triage
- What
- Multiple kernel vulnerabilities across x86, cryptography, networking, file systems, and protocol handlers.
- Who is affected
- Systems running affected Linux kernel versions.
- Urgency
- Moderate; various DoS and memory corruption vectors across multiple subsystems.
- Action
- Apply USN-8662-1 kernel security update from the distribution provider.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://ubuntu.com/security/notices/USN-8662-1
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-314050.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-314140.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-314480.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-316490.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-431980.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-434930.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-434990.73% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-462660.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-529550.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-529820.54% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-31405 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-31414 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-31448 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-31649 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-43198 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-43493 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-43499 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-46266 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-52955 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-52982 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-52986 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-53006 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-53176 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-53225 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-53228 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-53359 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownUSN-8666-2: Linux kernel (Azure) vulnerabilitiesubuntu
- unknownUSN-8630-5: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu
- medium[UPDATE] [medium] Linux Kernel: Multiple Vulnerabilitiescert-bund
- high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
- high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
- high[UPDATE] [medium] Linux Kernel: Vulnerability Allows Unspecified Attackcert-bund
- low[UPDATE] [low] Linux Kernel: Multiple Vulnerabilities Allow Denial of Servicecert-bund
- medium[UPDATE] [medium] Linux Kernel: Multiple Vulnerabilitiescert-bund
- medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
- lowUSN-8661-2: Linux kernel (Low Latency) vulnerabilitiesubuntu
- unknownUSN-8669-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
- unknownUSN-8668-1: Linux kernel (GCP) vulnerabilitiesubuntu
More from Ubuntu Security Notices
- unknownUSN-8659-4: Linux kernel (Oracle) vulnerability2026-08-26
- unknownUSN-8666-2: Linux kernel (Azure) vulnerabilities2026-08-25
- unknownUSN-8630-5: Linux kernel (Raspberry Pi) vulnerabilities2026-08-25
- unknownUSN-8658-3: Linux kernel vulnerabilities2026-08-25
- unknownUSN-8643-4: Linux kernel vulnerabilities2026-08-25