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Gentoo GLSA 202409-22: Normal Severity GCC Code Generation Flaw

A vulnerability has been discovered in GCC, which can lead to flawed code generation.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202409-22 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: GCC: Flawed Code Generation Date: September 24, 2024 Bugs: #719466 ID: 202409-22 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A vulnerability has been discovered in GCC, which can lead to flawed code generation. Background ========== The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Ada, Go, D and Modula-2 as well as libraries for these languages (libstdc++,...). Affected packages ================= Package Vulnerable Unaffected ------------- ------------ ------------ sys-devel/gcc < 10.0 > = 10.0 Description =========== A vulnerability has been discovered in GCC. Please review the CVE identifier referenced below for details. Impact ====== The POWER9 backend in GNU Compiler Collection (GCC) could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same. Workaround ========== There is no known workaround at this time. Resolution ========== All GCC users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =sys-devel/gcc-10.0" And then select it with gcc-config: # gcc-config latest In this case, users should also rebuild all affected packages with emerge -e, e.g.: # emerge --usepkg=n --emptytree@world References ========== [ 1 ] CVE-2019-15847 https://nvd.nist.gov/vuln/detail/CVE-2019-15847 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202409-22 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2024 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5 . A GCC issue was found in Gentoo GLSA 202409-22 that may cause vulnerabilities in applications. Users should upgrade GCC immediately for security.. GCC Flawed Code,Gentoo GLSA 202409-22,Gentoo Advisory. . LinuxSecurity.com Team

Sep 24, 2024 Gentoo