{"id":"CVE-2026-89466","title":"kernel: power: supply: qcom_battmgr: terminate the strings from firmware (CVE-2026-89466)","summary":"A flaw was found in the Linux kernel's `qcom_battmgr` component, responsible for power supply management. This vulnerability occurs due to improper string termination when handling firmware-provided strings. A malicious or malformed firmwa…","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-125","vendor":"Red Hat","product":"Linux","affected":["Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < c06028db620854b11ad81b04b0a4e1ead930cb76","Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < 0e70a9b0d16acf7adebc4f386178a95da27c0027","Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < ee053561e21ce1e1741dd64ca5ddcdb92e40edc1","Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < 6cc6c28c9ab6e8ecf901397717a5b391b828cdaf","Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < ab1112df8f4ffa88cb024dd370c432ced80f77d8","Linux 6.3"],"published":"2026-09-11","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:07:49+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89466.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89466.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89466"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532242"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89466"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89466"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89466.mbox"},{"url":"https://git.kernel.org/stable/c/c06028db620854b11ad81b04b0a4e1ead930cb76"},{"url":"https://git.kernel.org/stable/c/0e70a9b0d16acf7adebc4f386178a95da27c0027"},{"url":"https://git.kernel.org/stable/c/ee053561e21ce1e1741dd64ca5ddcdb92e40edc1"},{"url":"https://git.kernel.org/stable/c/6cc6c28c9ab6e8ecf901397717a5b391b828cdaf"},{"url":"https://git.kernel.org/stable/c/ab1112df8f4ffa88cb024dd370c432ced80f77d8"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00144,"epssPercentile":0.04025,"scores":{"vendor":5.5,"cna":7.7},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89466","body":"## Overview\n\nA flaw was found in the Linux kernel's `qcom_battmgr` component, responsible for power supply management. This vulnerability occurs due to improper string termination when handling firmware-provided strings. A malicious or malformed firmware string that completely fills its buffer can lead to an out-of-bounds read, potentially disclosing sensitive information from adjacent memory locations to user space.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89466.json)\n\n**kernel: power: supply: qcom_battmgr: terminate the strings from firmware** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-17.\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,"exploitation":0,"ransomware":0},"changes":[{"seq":206988,"id":"CVE-2026-89466","ts":1789749735308,"field":"cvss","old":"7.7","new":"5.5"},{"seq":206987,"id":"CVE-2026-89466","ts":1789749735308,"field":"severity","old":"high","new":"medium"},{"seq":198044,"id":"CVE-2026-89466","ts":1789384321523,"field":"cvss","old":"3.3","new":"7.7"},{"seq":198043,"id":"CVE-2026-89466","ts":1789384321523,"field":"severity","old":"low","new":"high"},{"seq":183341,"id":"CVE-2026-89466","ts":1789356674954,"field":"cvss","old":"7.7","new":"3.3"},{"seq":183340,"id":"CVE-2026-89466","ts":1789356674954,"field":"severity","old":"high","new":"low"},{"seq":153242,"id":"CVE-2026-89466","ts":1789285349703,"field":"cvss","old":null,"new":"7.7"},{"seq":153241,"id":"CVE-2026-89466","ts":1789285349703,"field":"severity","old":"none","new":"high"},{"seq":147436,"id":"CVE-2026-89466","ts":1789270210902,"field":"cvss","old":null,"new":"3.3"},{"seq":147435,"id":"CVE-2026-89466","ts":1789270210902,"field":"severity","old":"none","new":"low"},{"seq":109196,"id":"CVE-2026-89466","ts":1789183730686,"field":"cvss","old":null,"new":"3.3"},{"seq":109195,"id":"CVE-2026-89466","ts":1789183730686,"field":"severity","old":"none","new":"low"}]}