{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68264","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-16T13:41:40.267Z","datePublished":"2025-12-16T14:45:06.268Z","dateUpdated":"2026-05-11T21:50:00.951Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:50:00.951Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: refresh inline data size before write operations\n\nThe cached ei->i_inline_size can become stale between the initial size\ncheck and when ext4_update_inline_data()/ext4_create_inline_data() use\nit. Although ext4_get_max_inline_size() reads the correct value at the\ntime of the check, concurrent xattr operations can modify i_inline_size\nbefore ext4_write_lock_xattr() is acquired.\n\nThis causes ext4_update_inline_data() and ext4_create_inline_data() to\nwork with stale capacity values, leading to a BUG_ON() crash in\next4_write_inline_data():\n\n  kernel BUG at fs/ext4/inline.c:1331!\n  BUG_ON(pos + len > EXT4_I(inode)->i_inline_size);\n\nThe race window:\n1. ext4_get_max_inline_size() reads i_inline_size = 60 (correct)\n2. Size check passes for 50-byte write\n3. [Another thread adds xattr, i_inline_size changes to 40]\n4. ext4_write_lock_xattr() acquires lock\n5. ext4_update_inline_data() uses stale i_inline_size = 60\n6. Attempts to write 50 bytes but only 40 bytes actually available\n7. BUG_ON() triggers\n\nFix this by recalculating i_inline_size via ext4_find_inline_data_nolock()\nimmediately after acquiring xattr_sem. This ensures ext4_update_inline_data()\nand ext4_create_inline_data() work with current values that are protected\nfrom concurrent modifications.\n\nThis is similar to commit a54c4613dac1 (\"ext4: fix race writing to an\ninline_data file while its xattrs are changing\") which fixed i_inline_off\nstaleness. This patch addresses the related i_inline_size staleness issue."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inline.c"],"versions":[{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"54ab81ae5f218452e64470cd8a8139bb5880fe2b","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"43bf001f0fe4e59bba47c897505222f959f4a1cc","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"89c2c41f0974e530b2d032c3695095aa0559adb1","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"1687a055a555347b002f406676a1aaae4668f242","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"210ac60a86a3ad2c76ae60e0dc71c34af6e7ea0b","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"ca43ea29b4c4d2764aec8a26cffcfb677a871e6e","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"58df743faf21ceb1880f930aa5dd428e2a5e415d","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"892e1cf17555735e9d021ab036c36bc7b58b0e3b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inline.c"],"versions":[{"version":"3.8","status":"affected"},{"version":"0","lessThan":"3.8","status":"unaffected","versionType":"semver"},{"version":"5.10.248","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.198","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.160","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.120","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.62","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.17.12","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18.1","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.10.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.15.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.1.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.6.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.12.62"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.17.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.18.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/54ab81ae5f218452e64470cd8a8139bb5880fe2b"},{"url":"https://git.kernel.org/stable/c/43bf001f0fe4e59bba47c897505222f959f4a1cc"},{"url":"https://git.kernel.org/stable/c/89c2c41f0974e530b2d032c3695095aa0559adb1"},{"url":"https://git.kernel.org/stable/c/1687a055a555347b002f406676a1aaae4668f242"},{"url":"https://git.kernel.org/stable/c/210ac60a86a3ad2c76ae60e0dc71c34af6e7ea0b"},{"url":"https://git.kernel.org/stable/c/ca43ea29b4c4d2764aec8a26cffcfb677a871e6e"},{"url":"https://git.kernel.org/stable/c/58df743faf21ceb1880f930aa5dd428e2a5e415d"},{"url":"https://git.kernel.org/stable/c/892e1cf17555735e9d021ab036c36bc7b58b0e3b"}],"title":"ext4: refresh inline data size before write operations","x_generator":{"engine":"bippy-1.2.0"}}}}