{"id":"CVE-2024-42084","state":"PUBLISHED","title":"ftruncate: pass a signed offset","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nftruncate: pass a signed offset\n\nThe old ftruncate() syscall, using the 32-bit off_t misses a sign\nextension when called in compat mode on 64-bit architectures.  As a\nresult, passing a negative length accidentally succeeds in truncating\nto file size between 2GiB and 4GiB.\n\nChanging the type of the compat syscall to the signed compat_off_t\nchanges the behavior so it instead returns -EINVAL.\n\nThe native entry point, the truncate() syscall and the corresponding\nloff_t based variants are all correct already and do not suffer\nfrom this mistake.","publishedAt":"2024-07-29T16:26:20.581Z","updatedAt":"2026-05-11T20:26:40.945Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"c329760749b5419769e57cb2be80955d2805f9c9","versionType":"git"},{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"f531d4bc6c5588d713359e42ed65e46816d841d8","versionType":"git"},{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"84bf6b64a1a0dfc6de7e1b1c776d58d608e7865a","versionType":"git"},{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"dbb226d81cd02cee140139c2369791e6f61f2007","versionType":"git"},{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"5ae6af68410bdad6181ec82104bb9985a7a6a0fa","versionType":"git"},{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"836359247b0403e0634bfbc83e5bb8063fad287a","versionType":"git"},{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"930a4c369f74da26816eaaa71b5888d29b759c27","versionType":"git"},{"version":"3f6d078d4accfff8b114f968259a060bfdc7c682","status":"affected","lessThan":"4b8e88e563b5f666446d002ad0dc1e6e8e7102b0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/open.c","include/linux/compat.h","include/linux/syscalls.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"4.19.317","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.279","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.221","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.162","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.97","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.37","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.8","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/open.c","include/linux/compat.h","include/linux/syscalls.h"]}],"references":["https://git.kernel.org/stable/c/c329760749b5419769e57cb2be80955d2805f9c9","https://git.kernel.org/stable/c/f531d4bc6c5588d713359e42ed65e46816d841d8","https://git.kernel.org/stable/c/84bf6b64a1a0dfc6de7e1b1c776d58d608e7865a","https://git.kernel.org/stable/c/dbb226d81cd02cee140139c2369791e6f61f2007","https://git.kernel.org/stable/c/5ae6af68410bdad6181ec82104bb9985a7a6a0fa","https://git.kernel.org/stable/c/836359247b0403e0634bfbc83e5bb8063fad287a","https://git.kernel.org/stable/c/930a4c369f74da26816eaaa71b5888d29b759c27","https://git.kernel.org/stable/c/4b8e88e563b5f666446d002ad0dc1e6e8e7102b0","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:47.831Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/42xxx/CVE-2024-42084.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-42084","state":"PUBLISHED","datePublished":"2024-07-29T16:26:20.581Z","dateUpdated":"2026-05-11T20:26:40.945Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-07-29T15:50:41.170Z"},"containers":{"cna":{"title":"ftruncate: pass a signed offset","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nftruncate: pass a signed offset\n\nThe old ftruncate() syscall, using the 32-bit off_t misses a sign\nextension when called in compat mode on 64-bit architectures.  As a\nresult, passing a negative length accidentally succeeds in truncating\nto file size between 2GiB and 4GiB.\n\nChanging the type of the compat syscall to the signed compat_off_t\nchanges the behavior so it instead returns -EINVAL.\n\nThe native entry point, the truncate() syscall and the corresponding\nloff_t based variants are all correct already and do not suffer\nfrom this 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