{"id":"CVE-2024-35849","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix information leak in btrfs_ioctl_logical_to_ino()\n\nSyzbot reported the following information leak for in\nbtrfs_ioctl_logical_to_ino():\n\n  BUG: KMSAN: kernel-i…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix information leak in btrfs_ioctl_logical_to_ino()\n\nSyzbot reported the following information leak for in\nbtrfs_ioctl_logical_to_ino():\n\n  BUG: KMSAN: kernel-i…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-908"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 4.19.313","linux_kernel >= 4.20, < 5.4.275","linux_kernel >= 5.5, < 5.10.216","linux_kernel >= 5.11, < 5.15.158","linux_kernel >= 5.16, < 6.1.90","linux_kernel >= 6.2, < 6.6.30","linux_kernel >= 6.7, < 6.8.9","linux_kernel = 6.9","debian_linux = 10.0"],"patched":["linux_kernel 6.8.9"],"published":"2024-05-17","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:17:49.017","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-35849","references":[{"url":"https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00256,"epssPercentile":0.16255,"ingestedAt":"2026-10-15T03:30:12.683Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-05-23T19:26:21.803612Z"},"slug":"CVE-2024-35849","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix information leak in btrfs_ioctl_logical_to_ino()\n\nSyzbot reported the following information leak for in\nbtrfs_ioctl_logical_to_ino():\n\n  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n  BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40\n   instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n   _copy_to_user+0xbc/0x110 lib/usercopy.c:40\n   copy_to_user include/linux/uaccess.h:191 [inline]\n   btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499\n   btrfs_ioctl+0x714/0x1260\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:904 [inline]\n   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\n   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\n   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\n   do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  Uninit was created at:\n   __kmalloc_large_node+0x231/0x370 mm/slub.c:3921\n   __do_kmalloc_node mm/slub.c:3954 [inline]\n   __kmalloc_node+0xb07/0x1060 mm/slub.c:3973\n   kmalloc_node include/linux/slab.h:648 [inline]\n   kvmalloc_node+0xc0/0x2d0 mm/util.c:634\n   kvmalloc include/linux/slab.h:766 [inline]\n   init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779\n   btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480\n   btrfs_ioctl+0x714/0x1260\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:904 [inline]\n   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\n   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\n   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\n   do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  Bytes 40-65535 of 65536 are uninitialized\n  Memory access of size 65536 starts at ffff888045a40000\n\nThis happens, because we're copying a 'struct btrfs_data_container' back\nto user-space. This btrfs_data_container is allocated in\n'init_data_container()' via kvmalloc(), which does not zero-fill the\nmemory.\n\nFix this by using kvzalloc() which zeroes out the memory on allocation.\n\n## Affected\n\n- `linux_kernel < 4.19.313`\n- `linux_kernel >= 4.20, < 5.4.275`\n- `linux_kernel >= 5.5, < 5.10.216`\n- `linux_kernel >= 5.11, < 5.15.158`\n- `linux_kernel >= 5.16, < 6.1.90`\n- `linux_kernel >= 6.2, < 6.6.30`\n- `linux_kernel >= 6.7, < 6.8.9`\n- `linux_kernel = 6.9`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.8.9`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}