CVE-2026-74677: net: usb: ipheth: fix carrier_work UAF on disconnect

mediumCVSS 4.2CVE-2026-74677

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Use-after-free in ipheth USB driver's carrier_work function triggered during device disconnect.
Who is affected: Systems using Apple iPhone USB Ethernet driver (ipheth) that disconnect devices during active use.
Urgency: Medium severity (CVSS 4.2) with no current exploitation; requires specific USB device interaction.
Action: Apply Linux kernel patch to properly cancel carrier_work before device disconnect in ipheth driver.

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

⚡ Watch Linux kernel

Get an email when a new Linux kernel advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.2
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74677

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-2026-746770.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74677	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-74677: In the Linux kernel, the following vulnerability has been resolved: net: usb: ipheth: fix carr…nvd

Recent advisories for net

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[UPDATE] [medium] Golang Go-Module (Net, Image, Crypto): Multiple Vulnerabilitiescert-bund · 2026-08-24
mediumCVE-2026-12999: The Infineon Airoc Wi-Fi driver's transmit callback airoc_mgmt_send() in drivers/wifi/infineon…nvd · 2026-08-22
unknownCVE-2026-74718: In the Linux kernel, the following vulnerability has been resolved: devlink: fix net namespace…nvd · 2026-08-22
unknownCVE-2026-74693: In the Linux kernel, the following vulnerability has been resolved: net: prestera: validate fi…nvd · 2026-08-22
highCVE-2026-74691: In the Linux kernel, the following vulnerability has been resolved: net: thunderbolt: Tear dow…nvd · 2026-08-22
highCVE-2026-74684: In the Linux kernel, the following vulnerability has been resolved: net: tap: set skb->dev bef…nvd · 2026-08-22