USN-8637-1: Linux kernel (OEM) vulnerabilities

unknownpublic exploitCVE-2026-46331 CVE-2026-52924 CVE-2026-53131 CVE-2026-53146 CVE-2026-53147 CVE-2026-53148

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; - InfiniBand drivers; - Network drivers; - Thunderbolt and USB4 drivers; - Network traffic control; - IPv4 networking; - IPv6 networking; - Netfilter; - RxRPC session sockets; - SCTP protocol; (CVE-2026-46331, CVE-2026-52924, CVE-2026-53131, CVE-2026-53146, CVE-2026-53147, CVE-2026-53148, CVE-2026-53149, CVE-2026-53150, CVE-2026-53151, CVE-2026-53175, CVE-2026-53176, CVE-2026-53186, CVE-2026-53212, CVE-2026-53215, CVE-2026-53216, CVE-2026-53221, CVE-2026-53224, CVE-2026-53225, CVE-2026-53228, CVE-2026-53246, CVE-2026-53247, CVE-2026-53260, CVE-2026-53359)

CSIRTS triage

vendor: Linux product: Linux kernel (OEM)Remote code execution Denial of service Memory corruptionOtheraffected: OEM kernel versions

What: Multiple security flaws in kernel subsystems including x86, InfiniBand, network drivers, Thunderbolt, USB4, network traffic control, IPv4/IPv6, Netfilter, RxRPC, and SCTP.
Who is affected: Systems running affected OEM Linux kernel versions.
Urgency: High; multiple vectors across critical kernel subsystems warrant timely patching.
Action: Apply kernel update via OEM channels to address all listed CVEs.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Ubuntu Security Notices (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-08-13
Exploitation: Not in CISA KEV at last sync

Original advisory: https://ubuntu.com/security/notices/USN-8637-1

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-2026-463310.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-529240.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-531310.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-531460.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-531470.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-531480.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-531490.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-531500.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-531510.46% 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-2026-531750.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-46331	coverage & exploitation status	NVD · CVE.org
CVE-2026-52924	coverage & exploitation status	NVD · CVE.org
CVE-2026-53131	coverage & exploitation status	NVD · CVE.org
CVE-2026-53146	coverage & exploitation status	NVD · CVE.org
CVE-2026-53147	coverage & exploitation status	NVD · CVE.org
CVE-2026-53148	coverage & exploitation status	NVD · CVE.org
CVE-2026-53149	coverage & exploitation status	NVD · CVE.org
CVE-2026-53150	coverage & exploitation status	NVD · CVE.org
CVE-2026-53151	coverage & exploitation status	NVD · CVE.org
CVE-2026-53175	coverage & exploitation status	NVD · CVE.org
CVE-2026-53176	coverage & exploitation status	NVD · CVE.org
CVE-2026-53186	coverage & exploitation status	NVD · CVE.org
CVE-2026-53212	coverage & exploitation status	NVD · CVE.org
CVE-2026-53215	coverage & exploitation status	NVD · CVE.org
CVE-2026-53216	coverage & exploitation status	NVD · CVE.org
CVE-2026-53221	coverage & exploitation status	NVD · CVE.org
CVE-2026-53224	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-2026-53246	coverage & exploitation status	NVD · CVE.org
CVE-2026-53247	coverage & exploitation status	NVD · CVE.org
CVE-2026-53260	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.

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medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
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