{"id":"CVE-2026-64360","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nhfs/hfsplus: zero-initialize buffer in hfs_bnode_read\n\nhfs_bnode_read() can return early without writing to the output buffer\nwhen is_bnode_offset_valid() fails or when…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nhfs/hfsplus: zero-initialize buffer in hfs_bnode_read\n\nhfs_bnode_read() can return early without writing to the output buffer\nwhen is_bnode_offset_valid() fails or when…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-908"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.4.297, < 5.5","linux_kernel >= 5.10.241, < 5.10.261","linux_kernel >= 5.15.190, < 5.15.212","linux_kernel >= 6.1.149, < 6.1.178","linux_kernel >= 6.6.103, < 6.6.145","linux_kernel >= 6.12.43, < 6.12.96","linux_kernel >= 6.15.11, < 6.16","linux_kernel >= 6.16.2, < 6.18.39","linux_kernel >= 6.19, < 7.1.4"],"patched":["linux_kernel 7.1.4"],"published":"2026-07-25","updated":"2026-09-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64360","references":[{"url":"https://git.kernel.org/stable/c/0b189b2204f1a2612dc68f8d139fb5b80539e710","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/16ca053c2be5f4f3044dccf7fc19237dc820d394","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/34684a04777358b2b40ac729e54c8e45359e46b3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8f72fd25a57a457866350359ddd27a43caa62c95","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d2afc7ecee476f9251dd87444f7fb6a424410922","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d5b45bad75cd2730b8452aed4d3b20a2b2a12576","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f3461b84a4865d9b5e70fbb71da72ae044a3bcd2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00123,"epssPercentile":0.02372,"ingestedAt":"2026-09-05T13:39:56.882Z","slug":"CVE-2026-64360","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nhfs/hfsplus: zero-initialize buffer in hfs_bnode_read\n\nhfs_bnode_read() can return early without writing to the output buffer\nwhen is_bnode_offset_valid() fails or when check_and_correct_requested_\nlength() corrects the length to zero.  Callers such as hfs_bnode_read_\nu16() and hfs_bnode_read_u8() pass stack-allocated buffers and use the\nresult unconditionally, leading to KMSAN uninit-value reports.\n\nRather than initializing at each individual call site, zero the buffer\nat the start of hfs_bnode_read() before any validation checks.  This\nensures all callers in both hfs and hfsplus get a deterministic zero\nvalue regardless of which early-return path is taken.\n\n## Affected\n\n- `linux_kernel >= 5.4.297, < 5.5`\n- `linux_kernel >= 5.10.241, < 5.10.261`\n- `linux_kernel >= 5.15.190, < 5.15.212`\n- `linux_kernel >= 6.1.149, < 6.1.178`\n- `linux_kernel >= 6.6.103, < 6.6.145`\n- `linux_kernel >= 6.12.43, < 6.12.96`\n- `linux_kernel >= 6.15.11, < 6.16`\n- `linux_kernel >= 6.16.2, < 6.18.39`\n- `linux_kernel >= 6.19, < 7.1.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.1.4`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}