{"id":"CVE-2023-53101","state":"PUBLISHED","title":"ext4: zero i_disksize when initializing the bootloader inode","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: zero i_disksize when initializing the bootloader inode\n\nIf the boot loader inode has never been used before, the\nEXT4_IOC_SWAP_BOOT inode will initialize it, including setting the\ni_size to 0.  However, if the \"never before used\" boot loader has a\nnon-zero i_size, then i_disksize will be non-zero, and the\ninconsistency between i_size and i_disksize can trigger a kernel\nwarning:\n\n WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319\n CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa\n RIP: 0010:ext4_file_write_iter+0xbc7/0xd10\n Call Trace:\n  vfs_write+0x3b1/0x5c0\n  ksys_write+0x77/0x160\n  __x64_sys_write+0x22/0x30\n  do_syscall_64+0x39/0x80\n\nReproducer:\n 1. create corrupted image and mount it:\n       mke2fs -t ext4 /tmp/foo.img 200\n       debugfs -wR \"sif <5> size 25700\" /tmp/foo.img\n       mount -t ext4 /tmp/foo.img /mnt\n       cd /mnt\n       echo 123 > file\n 2. Run the reproducer program:\n       posix_memalign(&buf, 1024, 1024)\n       fd = open(\"file\", O_RDWR | O_DIRECT);\n       ioctl(fd, EXT4_IOC_SWAP_BOOT);\n       write(fd, buf, 1024);\n\nFix this by setting i_disksize as well as i_size to zero when\ninitiaizing the boot loader inode.","publishedAt":"2025-05-02T15:55:43.804Z","updatedAt":"2026-05-11T19:38:32.982Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"d6c1447e483c05dbcfb3ff77ac04237a82070b8c","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"59eee0cdf8c036f554add97a4da7c06d7a9ff34a","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"0d8a6c9a6415999fee1259ccf1796480c026b7d6","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"3f00c476da8fe7c4c34ea16abb55d74127120413","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"01a821aacc64d4b05dafd239dbc9b7856686002f","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"9cb27b1e76f0cc886ac09055bc41c0ab3f205167","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"9e9a4cc5486356158554f6ad73027d8635a48b34","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"f5361da1e60d54ec81346aee8e3d8baf1be0b762","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/ioctl.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"4.14.310","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.278","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.237","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.175","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.103","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.20","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.7","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/ioctl.c"]}],"references":["https://git.kernel.org/stable/c/d6c1447e483c05dbcfb3ff77ac04237a82070b8c","https://git.kernel.org/stable/c/59eee0cdf8c036f554add97a4da7c06d7a9ff34a","https://git.kernel.org/stable/c/0d8a6c9a6415999fee1259ccf1796480c026b7d6","https://git.kernel.org/stable/c/3f00c476da8fe7c4c34ea16abb55d74127120413","https://git.kernel.org/stable/c/01a821aacc64d4b05dafd239dbc9b7856686002f","https://git.kernel.org/stable/c/9cb27b1e76f0cc886ac09055bc41c0ab3f205167","https://git.kernel.org/stable/c/9e9a4cc5486356158554f6ad73027d8635a48b34","https://git.kernel.org/stable/c/f5361da1e60d54ec81346aee8e3d8baf1be0b762"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53101.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53101","state":"PUBLISHED","datePublished":"2025-05-02T15:55:43.804Z","dateUpdated":"2026-05-11T19:38:32.982Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-05-02T15:51:43.553Z"},"containers":{"cna":{"title":"ext4: zero i_disksize when initializing the bootloader inode","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: zero i_disksize when initializing the bootloader inode\n\nIf the boot loader inode has never been used before, the\nEXT4_IOC_SWAP_BOOT inode will initialize it, including setting the\ni_size to 0.  However, if the \"never before used\" boot loader has a\nnon-zero i_size, then i_disksize will be non-zero, and the\ninconsistency between i_size and i_disksize can trigger a kernel\nwarning:\n\n WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319\n CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa\n RIP: 0010:ext4_file_write_iter+0xbc7/0xd10\n Call Trace:\n  vfs_write+0x3b1/0x5c0\n  ksys_write+0x77/0x160\n  __x64_sys_write+0x22/0x30\n  do_syscall_64+0x39/0x80\n\nReproducer:\n 1. create corrupted image and mount it:\n       mke2fs -t ext4 /tmp/foo.img 200\n       debugfs -wR \"sif <5> size 25700\" /tmp/foo.img\n       mount -t ext4 /tmp/foo.img /mnt\n       cd /mnt\n       echo 123 > file\n 2. Run the reproducer program:\n       posix_memalign(&buf, 1024, 1024)\n       fd = open(\"file\", O_RDWR | O_DIRECT);\n       ioctl(fd, EXT4_IOC_SWAP_BOOT);\n       write(fd, buf, 1024);\n\nFix this by setting i_disksize as well as i_size to zero when\ninitiaizing the boot loader inode."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"d6c1447e483c05dbcfb3ff77ac04237a82070b8c","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"59eee0cdf8c036f554add97a4da7c06d7a9ff34a","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"0d8a6c9a6415999fee1259ccf1796480c026b7d6","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"3f00c476da8fe7c4c34ea16abb55d74127120413","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"01a821aacc64d4b05dafd239dbc9b7856686002f","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"9cb27b1e76f0cc886ac09055bc41c0ab3f205167","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"9e9a4cc5486356158554f6ad73027d8635a48b34","versionType":"git"},{"version":"393d1d1d76933886d5e1ce603214c9987589c6d5","status":"affected","lessThan":"f5361da1e60d54ec81346aee8e3d8baf1be0b762","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/ioctl.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"4.14.310","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.278","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.237","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.175","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.103","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.20","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.7","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/ioctl.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d6c1447e483c05dbcfb3ff77ac04237a82070b8c"},{"url":"https://git.kernel.org/stable/c/59eee0cdf8c036f554add97a4da7c06d7a9ff34a"},{"url":"https://git.kernel.org/stable/c/0d8a6c9a6415999fee1259ccf1796480c026b7d6"},{"url":"https://git.kernel.org/stable/c/3f00c476da8fe7c4c34ea16abb55d74127120413"},{"url":"https://git.kernel.org/stable/c/01a821aacc64d4b05dafd239dbc9b7856686002f"},{"url":"https://git.kernel.org/stable/c/9cb27b1e76f0cc886ac09055bc41c0ab3f205167"},{"url":"https://git.kernel.org/stable/c/9e9a4cc5486356158554f6ad73027d8635a48b34"},{"url":"https://git.kernel.org/stable/c/f5361da1e60d54ec81346aee8e3d8baf1be0b762"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:38:32.982Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"4.14.310"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"4.19.278"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.4.237"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.10.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.15.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.1.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}