{"id":"CVE-2026-89616","title":"kernel: fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame() (CVE-2026-89616)","summary":"A flaw was found in the Linux kernel's NTFS3 filesystem driver. When decompressing LZNT data, the `ni_read_frame()` function may not fully zero out memory after a partial decompression. This can lead to the disclosure of previously used ke…","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","cvssSource":"vendor","cwe":"CWE-908","vendor":"Red Hat","product":"Linux","affected":["Linux >= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 7d60a4c49af4d5cb88aa7cbf998d0408bd415055","Linux >= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < cd40eee4923d104ebec9ac7513b971bc441e431d","Linux >= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 77d8efd04745cda23858546afdbd9d07b591758e","Linux >= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea","Linux >= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 376ee45659a4b943df672ad275c63da00655f929","Linux >= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 4a1b39b2e10eb8de86265e80cf2be4396bc1dce4","Linux >= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd","Linux 5.15"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T22:36:58+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89616.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89616.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89616"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532395"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89616"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89616"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89616.mbox"},{"url":"https://git.kernel.org/stable/c/7d60a4c49af4d5cb88aa7cbf998d0408bd415055"},{"url":"https://git.kernel.org/stable/c/cd40eee4923d104ebec9ac7513b971bc441e431d"},{"url":"https://git.kernel.org/stable/c/77d8efd04745cda23858546afdbd9d07b591758e"},{"url":"https://git.kernel.org/stable/c/0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea"},{"url":"https://git.kernel.org/stable/c/376ee45659a4b943df672ad275c63da00655f929"},{"url":"https://git.kernel.org/stable/c/4a1b39b2e10eb8de86265e80cf2be4396bc1dce4"},{"url":"https://git.kernel.org/stable/c/35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00415,"epssPercentile":0.35368,"scores":{"vendor":5.5,"cna":7.5},"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89616","body":"## Overview\n\nA flaw was found in the Linux kernel's NTFS3 filesystem driver. When decompressing LZNT data, the `ni_read_frame()` function may not fully zero out memory after a partial decompression. This can lead to the disclosure of previously used kernel memory pages to a local attacker who reads a specially crafted compressed file. Successful exploitation could allow an attacker to obtain sensitive kernel pointers, potentially bypassing Kernel Address Space Layout Randomization (KASLR) and aiding further attacks.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89616.json)\n\n**kernel: fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":208083,"id":"CVE-2026-89616","ts":1789922706478,"field":"cvss","old":"7.5","new":"5.5"},{"seq":208082,"id":"CVE-2026-89616","ts":1789922706478,"field":"severity","old":"high","new":"medium"},{"seq":197843,"id":"CVE-2026-89616","ts":1789384320643,"field":"cvss","old":"5.5","new":"7.5"},{"seq":197842,"id":"CVE-2026-89616","ts":1789384320643,"field":"severity","old":"medium","new":"high"},{"seq":183400,"id":"CVE-2026-89616","ts":1789356675210,"field":"cvss","old":"7.5","new":"5.5"},{"seq":183399,"id":"CVE-2026-89616","ts":1789356675210,"field":"severity","old":"high","new":"medium"},{"seq":153450,"id":"CVE-2026-89616","ts":1789285350560,"field":"cvss","old":null,"new":"7.5"},{"seq":153449,"id":"CVE-2026-89616","ts":1789285350560,"field":"severity","old":"none","new":"high"},{"seq":147279,"id":"CVE-2026-89616","ts":1789270206562,"field":"cvss","old":null,"new":"5.5"},{"seq":147278,"id":"CVE-2026-89616","ts":1789270206562,"field":"severity","old":"none","new":"medium"},{"seq":109032,"id":"CVE-2026-89616","ts":1789183730037,"field":"cvss","old":null,"new":"5.5"},{"seq":109031,"id":"CVE-2026-89616","ts":1789183730037,"field":"severity","old":"none","new":"medium"}]}