{"id":"CVE-2026-89719","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix out-of-bounds access in read_block_state()\n\nread_block_state() calculates nr_pages before taking dev_lock","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix out-of-bounds access in read_block_state()\n\nread_block_state() calculates nr_pages before taking dev_lock.  If the\ndevice is reset and reinitialized with a sm…","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-805"],"vendor":"Linux","product":"Linux","affected":["Linux >= c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b","Linux >= c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d","Linux >= c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3","Linux >= c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 391f057f44a51cc9418da5cba78b014324174264","Linux 4.18"],"published":"2026-09-11","updated":"2026-09-21","sourceUpdated":"2026-09-21T14:17:26.067","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89719","references":[{"url":"https://git.kernel.org/stable/c/391f057f44a51cc9418da5cba78b014324174264","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89719.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89719"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532158"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89719"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89719"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89719.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00168,"epssPercentile":0.06439,"cvssSource":"vendor","ingestedAt":"2026-09-14T11:11:19.885Z","slug":"CVE-2026-89719","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix out-of-bounds access in read_block_state()\n\nread_block_state() calculates nr_pages before taking dev_lock.  If the\ndevice is reset and reinitialized with a smaller disksize before lock\nacquisition, nr_pages still describes the old table.  The subsequent loop\ncan then call slot_lock() past the end of the newly allocated table.\n\nRead disksize after acquiring dev_lock and checking that the device is\ninitialized.  The read lock then keeps the table and its bound stable for\nthe duration of the scan.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89719.json)","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204093,"id":"CVE-2026-89719","ts":1789490231406,"field":"cvss","old":null,"new":"4.1"},{"seq":204092,"id":"CVE-2026-89719","ts":1789490231406,"field":"severity","old":"none","new":"medium"},{"seq":147638,"id":"CVE-2026-89719","ts":1789270211693,"field":"cvss","old":null,"new":"4.1"},{"seq":147637,"id":"CVE-2026-89719","ts":1789270211693,"field":"severity","old":"none","new":"medium"},{"seq":109394,"id":"CVE-2026-89719","ts":1789183731745,"field":"cvss","old":null,"new":"4.1"},{"seq":109393,"id":"CVE-2026-89719","ts":1789183731745,"field":"severity","old":"none","new":"medium"}]}