{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89466", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.709Z", "datePublished": "2026-09-11T19:43:26.621Z", "dateUpdated": "2026-10-19T08:47:15.439Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:15.439Z" }, "descriptions": [ { "lang": "en", "value": "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 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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The unterminated copies run in qcom_battmgr_sc8280xp_callback() on BATTMGR_BAT_INFO payloads received over on-SoC PMIC GLINK/rpmsg from the Qualcomm ADSP/SOCCP (PMIC_RTR_ADSP_APPS), not from a network protocol, Bluetooth, or a pluggable USB device.\nAC:L - Firmware fully controls the 128-byte model_number, serial_number, and oem_info fields; sending 128 non-NUL bytes (or a first byte that is not a Pascal length) always takes the memcpy() path that omits the terminator, with no race or attacker-uncontrollable layout.\nPR:N - pmic_glink_rpmsg_callback delivers ADSP/SOCCP payloads to qcom_battmgr_callback with no Linux credential or capability check, so compromised PMIC firmware can send BATTMGR_BAT_INFO and NOTIF_BAT_INFO without a host account.\nUI:N - Battery-info parsing and power_supply_changed() uevents run from the GLINK response/notification path and from automatic sysfs/uevent reads at boot; no victim must open a file, mount a filesystem, or take any other action.\nS:U - The over-read stays in host kernel memory around struct qcom_battmgr in the same OS security authority; this is ordinary kernel disclosure or denial of service, not a VM escape, IOMMU bypass, or sandbox breakout.\nC:H - Unterminated model_number, serial_number, and oem_info are printed with %s via world-readable power_supply sysfs and uevents; kernel vsnprintf scans until a NUL, an unbounded out-of-bounds read of adjacent kernel fields and pointers.\nI:N - qcom_battmgr_sc8280xp_strcpy() copies exactly BATTMGR_STRING_LEN bytes into same-sized destinations; the defect is a missing terminator that causes over-reads, not an out-of-bounds write, use-after-free, or control-flow hijack primitive.\nA:H - Unbounded %s scanning of those unterminated fields can walk past the kmalloc-backed qcom_battmgr object into unmapped pages, causing a kernel oops or panic, and firmware can retrigger the path through GLINK notifications." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/power/supply/qcom_battmgr.c" ], "versions": [ { "version": "29e8142b5623b5949587bcc4f591c4e6595c4aca", "lessThan": "c06028db620854b11ad81b04b0a4e1ead930cb76", "status": "affected", "versionType": "git" }, { "version": "29e8142b5623b5949587bcc4f591c4e6595c4aca", "lessThan": "0e70a9b0d16acf7adebc4f386178a95da27c0027", "status": "affected", "versionType": "git" }, { "version": "29e8142b5623b5949587bcc4f591c4e6595c4aca", "lessThan": "ee053561e21ce1e1741dd64ca5ddcdb92e40edc1", "status": "affected", "versionType": "git" }, { "version": "29e8142b5623b5949587bcc4f591c4e6595c4aca", "lessThan": "6cc6c28c9ab6e8ecf901397717a5b391b828cdaf", "status": "affected", "versionType": "git" }, { "version": "29e8142b5623b5949587bcc4f591c4e6595c4aca", "lessThan": "ab1112df8f4ffa88cb024dd370c432ced80f77d8", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/power/supply/qcom_battmgr.c" ], "versions": [ { "version": "6.3", "status": "affected" }, { "version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3" } ] } ] } ], "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" } ], "title": "power: supply: qcom_battmgr: terminate the strings from firmware", "x_generator": { "engine": "bippy-1.2.0" } } } }