CVE-2024-40974 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2024-40974 Interim 1 21 2025-03-24T00:36:09Z current 2024-07-16T23:10:13Z 2025-03-24T00:36:09Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2024-40974 In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Enforce hcall result buffer validity and size plpar_hcall(), plpar_hcall9(), and related functions expect callers to provide valid result buffers of certain minimum size. Currently this is communicated only through comments in the code and the compiler has no idea. For example, if I write a bug like this: long retbuf[PLPAR_HCALL_BUFSIZE]; // should be PLPAR_HCALL9_BUFSIZE plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, ...); This compiles with no diagnostics emitted, but likely results in stack corruption at runtime when plpar_hcall9() stores results past the end of the array. (To be clear this is a contrived example and I have not found a real instance yet.) To make this class of error less likely, we can use explicitly-sized array parameters instead of pointers in the declarations for the hcall APIs. When compiled with -Warray-bounds[1], the code above now provokes a diagnostic like this: error: array argument is too small; is of size 32, callee requires at least 72 [-Werror,-Warray-bounds] 60 | plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, | ^ ~~~~~~ [1] Enabled for LLVM builds but not GCC for now. See commit 0da6e5fd6c37 ("gcc: disable '-Warray-bounds' for gcc-13 too") and related changes. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Liberty Linux 8 bpftool-4.18.0-553.16.1.el8_10 kernel-4.18.0-553.16.1.el8_10 kernel-abi-stablelists-4.18.0-553.16.1.el8_10 kernel-core-4.18.0-553.16.1.el8_10 kernel-cross-headers-4.18.0-553.16.1.el8_10 kernel-debug-4.18.0-553.16.1.el8_10 kernel-debug-core-4.18.0-553.16.1.el8_10 kernel-debug-devel-4.18.0-553.16.1.el8_10 kernel-debug-modules-4.18.0-553.16.1.el8_10 kernel-debug-modules-extra-4.18.0-553.16.1.el8_10 kernel-devel-4.18.0-553.16.1.el8_10 kernel-doc-4.18.0-553.16.1.el8_10 kernel-headers-4.18.0-553.16.1.el8_10 kernel-modules-4.18.0-553.16.1.el8_10 kernel-modules-extra-4.18.0-553.16.1.el8_10 kernel-tools-4.18.0-553.16.1.el8_10 kernel-tools-libs-4.18.0-553.16.1.el8_10 kernel-tools-libs-devel-4.18.0-553.16.1.el8_10 perf-4.18.0-553.16.1.el8_10 python3-perf-4.18.0-553.16.1.el8_10 bpftool-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-abi-stablelists-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-core-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-cross-headers-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-debug-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-debug-core-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-debug-devel-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-debug-modules-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-debug-modules-extra-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-devel-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-doc-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-headers-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-modules-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-modules-extra-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-tools-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-tools-libs-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 kernel-tools-libs-devel-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 perf-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 python3-perf-4.18.0-553.16.1.el8_10 as a component of SUSE Liberty Linux 8 In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Enforce hcall result buffer validity and size plpar_hcall(), plpar_hcall9(), and related functions expect callers to provide valid result buffers of certain minimum size. Currently this is communicated only through comments in the code and the compiler has no idea. For example, if I write a bug like this: long retbuf[PLPAR_HCALL_BUFSIZE]; // should be PLPAR_HCALL9_BUFSIZE plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, ...); This compiles with no diagnostics emitted, but likely results in stack corruption at runtime when plpar_hcall9() stores results past the end of the array. (To be clear this is a contrived example and I have not found a real instance yet.) To make this class of error less likely, we can use explicitly-sized array parameters instead of pointers in the declarations for the hcall APIs. When compiled with -Warray-bounds[1], the code above now provokes a diagnostic like this: error: array argument is too small; is of size 32, callee requires at least 72 [-Werror,-Warray-bounds] 60 | plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, | ^ ~~~~~~ [1] Enabled for LLVM builds but not GCC for now. See commit 0da6e5fd6c37 ("gcc: disable '-Warray-bounds' for gcc-13 too") and related changes. CVE-2024-40974 SUSE Liberty Linux 8:bpftool-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-abi-stablelists-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-core-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-cross-headers-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-debug-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-debug-core-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-debug-devel-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-debug-modules-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-debug-modules-extra-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-devel-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-doc-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-headers-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-modules-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-modules-extra-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-tools-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-tools-libs-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:kernel-tools-libs-devel-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:perf-4.18.0-553.16.1.el8_10 SUSE Liberty Linux 8:python3-perf-4.18.0-553.16.1.el8_10 moderate 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H