--- title: Urgent Update: Fix Linux Kernel ActPedit Local Privilege... description: A high-severity local privilege escalation vulnerability (CVE-2026-46331, codenamed ActPedit/pedit COW) has been disclosed in the Linux kernel's packet editing... canonical: https://daily.dev/posts/urgent-update-fix-linux-kernel-actpedit-local-privilege-escalation-deepin-technology-community-zmqeppl5g twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Urgent Update: Fix Linux Kernel ActPedit Local Privilege Escalation – Deepin Technology Community | daily.dev og:description: A high-severity local privilege escalation vulnerability (CVE-2026-46331, codenamed ActPedit/pedit COW) has been disclosed in the Linux kernel's packet editing... og:url: https://daily.dev/posts/urgent-update-fix-linux-kernel-actpedit-local-privilege-escalation-deepin-technology-community-zmqeppl5g og:image: https://api.daily.dev/og/posts/zMQepPl5g.png og:image:alt: Urgent Update: Fix Linux Kernel ActPedit Local Privilege Escalation – Deepin Technology Community og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Urgent Update: Fix Linux Kernel ActPedit Local Privilege Escalation – Deepin Technology Community **[Deepin](https://daily.dev/sources/deepin)** · 2 min read · 1 upvotes · 0 comments ## Summary A high-severity local privilege escalation vulnerability (CVE-2026-46331, codenamed ActPedit/pedit COW) has been disclosed in the Linux kernel's packet editing (pedit) subsystem. The flaw in the tcf_pedit_act() function allows attackers with local access to configure traffic control rules to corrupt the page cache of read-only files and gain full root access. Public PoC exploit code is available, raising the urgency. Deepin 25 users are advised to immediately update via the Control Center or by running sudo apt update && sudo apt dist-upgrade, then reboot. The fix is included in the deepin 25.1.1 release. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [pedit COW kernel local privilege escalation vulnerability mitigations](https://daily.dev/posts/pedit-cow-kernel-local-privilege-escalation-vulnerability-mitigations-dlyftc9wg) · Ubuntu · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#linux](https://daily.dev/tags/linux) [View this post on daily.dev](https://daily.dev/posts/urgent-update-fix-linux-kernel-actpedit-local-privilege-escalation-deepin-technology-community-zmqeppl5g) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Urgent Update: Fix Linux Kernel ActPedit Local Privilege Escalation – Deepin Technology Community","url":"https://daily.dev/posts/urgent-update-fix-linux-kernel-actpedit-local-privilege-escalation-deepin-technology-community-zmqeppl5g","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/urgent-update-fix-linux-kernel-actpedit-local-privilege-escalation-deepin-technology-community-zmqeppl5g"},"datePublished":"2026-07-09T07:50:11.023Z","dateModified":"2026-07-09T07:52:14.803Z","description":"A high-severity local privilege escalation vulnerability (CVE-2026-46331, codenamed ActPedit/pedit COW) has been disclosed in the Linux kernel's packet editing...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/329c39ce988a3a651e738a9baa580b0d?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/329c39ce988a3a651e738a9baa580b0d?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Deepin","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Deepin","logo":"https://media.daily.dev/image/upload/s--8LfuZqtf--/f_auto/v1749713157/logos/deepin","url":"https://daily.dev/sources/deepin"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/urgent-update-fix-linux-kernel-actpedit-local-privilege-escalation-deepin-technology-community-zmqeppl5g","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,linux","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Deepin","item":"https://daily.dev/sources/deepin"},{"@type":"ListItem","position":3,"name":"Urgent Update: Fix Linux Kernel ActPedit Local Privilege Escalation – Deepin Technology Community"}]} ```