{"id":"CVE-2026-89466","title":"power: supply: qcom_battmgr: terminate the strings from firmware","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: qcom_battmgr: terminate the strings from firmware\n\nThe qcom_battmgr_sc8280xp_strcpy() takes a Pascal-style string when the\nfirmware sends one. Otherwise …","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Linux","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":"2026-10-19","sourceUpdated":"2026-10-19T08:47:15.439Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89466","references":[{"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"},{"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"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00142,"epssPercentile":0.0345,"scores":{"cna":7.7,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89466","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: qcom_battmgr: terminate the strings from firmware\n\nThe qcom_battmgr_sc8280xp_strcpy() takes a Pascal-style string when the\nfirmware sends one. Otherwise it copies all BATTMGR_STRING_LEN bytes and\nleaves the destination without a terminator.\n\nThose destinations are model_number, serial_number and oem_info, each\nBATTMGR_STRING_LEN and declared next to each other. They go out to user\nspace as val->strval, which power_supply_format_property() prints with\n\"%s\", so a firmware string that fills the whole field makes that read run\ninto the following members.\n\nUse strscpy() so the copy always terminates, the way the SM8350 path\nalready does for the same field.\n\n## Affected\n\n- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < c06028db620854b11ad81b04b0a4e1ead930cb76`\n- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < 0e70a9b0d16acf7adebc4f386178a95da27c0027`\n- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < ee053561e21ce1e1741dd64ca5ddcdb92e40edc1`\n- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < 6cc6c28c9ab6e8ecf901397717a5b391b828cdaf`\n- `Linux >= 29e8142b5623b5949587bcc4f591c4e6595c4aca < ab1112df8f4ffa88cb024dd370c432ced80f77d8`\n- `Linux 6.3`\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 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89466.json)","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224754,"id":"CVE-2026-89466","ts":1792401521353,"field":"cvss","old":"5.5","new":"7.7"},{"seq":224753,"id":"CVE-2026-89466","ts":1792401521353,"field":"severity","old":"medium","new":"high"},{"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"}]}