Date: Wed, 29 Apr 2026 14:47:20 +0000 From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 8e8ddb05d071 - main - execve: Fix an operator precedence bug Message-ID: <69f219f8.3cc0f.79010041@gitrepo.freebsd.org>
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The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=8e8ddb05d07142e95cf84e32bf93b9ecb3f90283 commit 8e8ddb05d07142e95cf84e32bf93b9ecb3f90283 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2026-04-22 17:58:35 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2026-04-29 14:39:27 +0000 execve: Fix an operator precedence bug The buggy version allowed userspace to overflow the copy into adjacent execve KVA regions, which enables, among other things, injecting environment variables into privileged processes. Approved by: so Security: FreeBSD-SA-26:13.exec Security: CVE-2026-7270 Reported by: Ryan Austin of Calif.io Reviewed by: brooks, kib Fixes: f373437a01a3 ("Add helper functions to copy strings into struct image_args.") Differential Revision: https://reviews.freebsd.org/D56665 --- sys/kern/kern_exec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c index df5a1c044643..8e3b41170cab 100644 --- a/sys/kern/kern_exec.c +++ b/sys/kern/kern_exec.c @@ -1650,7 +1650,7 @@ exec_args_adjust_args(struct image_args *args, size_t consume, ssize_t extend) if (args->stringspace < offset) return (E2BIG); memmove(args->begin_argv + extend, args->begin_argv + consume, - args->endp - args->begin_argv + consume); + args->endp - (args->begin_argv + consume)); if (args->envc > 0) args->begin_envv += offset; args->endp += offset;home | help
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