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socket error queue

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The tag 'socket error queue' on WindowsForum.com covers a Linux kernel vulnerability (CVE-2026-22977) that causes a hardened-usercopy panic in sock_recv_errqueue. This defect leads to a deterministic kernel panic when TCP skb allocation, cloning, and error-queue delivery interact with userspace reads of the socket error queue via recvmsg(MSG_ERRQUEUE). The issue is not a remote code execution flaw but impacts system availability. Upstream maintainers have merged a fix into stable trees, and major distributions are backporting it. System administrators and kernel packagers should treat this as a pragmatic stability concern.
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    CVE-2026-22977 Hardened Usercopy Panic Crashes Linux Kernel Sockets

    A subtle but consequential weakness in the Linux kernel’s socket handling has been assigned CVE‑2026‑22977: a hardened‑usercopy panic in sock_recv_errqueue that can crash systems compiled with usercopy hardening enabled. The defect is not a remote code‑execution hole, but it produces a...
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    • cve 2026 22977 hardened usercopy linux kernel socket error queue
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    • Forum: Security Alerts
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