Bugzilla – Bug 1222962
VUL-0: CVE-2024-26818: kernel: tools/rtla: Fix clang warning about mount_point var size
Last modified: 2024-05-29 12:26:31 UTC
In the Linux kernel, the following vulnerability has been resolved: tools/rtla: Fix clang warning about mount_point var size clang is reporting this warning: $ make HOSTCC=clang CC=clang LLVM_IAS=1 [...] clang -O -g -DVERSION=\"6.8.0-rc3\" -flto=auto -fexceptions -fstack-protector-strong -fasynchronous-unwind-tables -fstack-clash-protection -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS $(pkg-config --cflags libtracefs) -c -o src/utils.o src/utils.c src/utils.c:548:66: warning: 'fscanf' may overflow; destination buffer in argument 3 has size 1024, but the corresponding specifier may require size 1025 [-Wfortify-source] 548 | while (fscanf(fp, "%*s %" STR(MAX_PATH) "s %99s %*s %*d %*d\n", mount_point, type) == 2) { | ^ Increase mount_point variable size to MAX_PATH+1 to avoid the overflow. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26818 https://www.cve.org/CVERecord?id=CVE-2024-26818 https://git.kernel.org/stable/c/30369084ac6e27479a347899e74f523e6ca29b89 https://git.kernel.org/stable/c/6bdd43f62ab3bb5a306af7f0ab857af45777f5a8 https://git.kernel.org/stable/c/8a585914c266dc044f53b5c83c170f79b45fcf9a https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26818.mbox
The CVE seems completely bogus here. I fail to see how any attacker can shape the content of /proc/mounts without already owning the machine one way or the other.
All done, closing.