{"id":"CVE-2026-89462","title":"power: supply: max17040: propagate register read errors","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: max17040: propagate register read errors\n\nmax17040_get_vcell() and max17040_get_soc() ignore errors returned by\nregmap_read().  When an I2C transfer fail…","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":"Linux","product":"Linux","affected":["Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < bcdcbef9c5e69a1e79c6b9f6a3434da2f68724ed","Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < 2943a0edd4865ed744702ada647921c3981207f6","Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < 13fb0477da9b400071b9d518b24d6434c4965263","Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < c7aa4c3708cc0d8487336f8281665eaea87130f6","Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < 659cc3d8d5ef246263873fce72c8cadeeed073cc","Linux 2.6.31"],"published":"2026-09-11","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:47:31.845Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89462","references":[{"url":"https://git.kernel.org/stable/c/bcdcbef9c5e69a1e79c6b9f6a3434da2f68724ed"},{"url":"https://git.kernel.org/stable/c/2943a0edd4865ed744702ada647921c3981207f6"},{"url":"https://git.kernel.org/stable/c/13fb0477da9b400071b9d518b24d6434c4965263"},{"url":"https://git.kernel.org/stable/c/c7aa4c3708cc0d8487336f8281665eaea87130f6"},{"url":"https://git.kernel.org/stable/c/659cc3d8d5ef246263873fce72c8cadeeed073cc"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89462.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89462"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532447"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89462"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89462"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89462.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00168,"epssPercentile":0.06151,"ingestedAt":"2026-09-14T00:35:28.530Z","slug":"CVE-2026-89462","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: max17040: propagate register read errors\n\nmax17040_get_vcell() and max17040_get_soc() ignore errors returned by\nregmap_read().  When an I2C transfer fails, the uninitialized register\nvalue is converted and reported to userspace as a valid voltage or state\nof charge.  The polling worker can also replace the cached state of charge\nwith the bogus value and emit a spurious change event.\n\nPropagate read errors through the power supply get_property callback and\nkeep the last valid cached state of charge when polling fails.\n\n## Affected\n\n- `Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < bcdcbef9c5e69a1e79c6b9f6a3434da2f68724ed`\n- `Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < 2943a0edd4865ed744702ada647921c3981207f6`\n- `Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < 13fb0477da9b400071b9d518b24d6434c4965263`\n- `Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < c7aa4c3708cc0d8487336f8281665eaea87130f6`\n- `Linux >= c6f4a42de60b981dd210de01cd3e575835e3158e < 659cc3d8d5ef246263873fce72c8cadeeed073cc`\n- `Linux 2.6.31`\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 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89462.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":203871,"id":"CVE-2026-89462","ts":1789490210435,"field":"cvss","old":null,"new":"5.5"},{"seq":203870,"id":"CVE-2026-89462","ts":1789490210435,"field":"severity","old":"none","new":"medium"},{"seq":147181,"id":"CVE-2026-89462","ts":1789270199411,"field":"cvss","old":null,"new":"5.3"},{"seq":147180,"id":"CVE-2026-89462","ts":1789270199411,"field":"severity","old":"none","new":"medium"},{"seq":108932,"id":"CVE-2026-89462","ts":1789183729600,"field":"cvss","old":null,"new":"5.3"},{"seq":108931,"id":"CVE-2026-89462","ts":1789183729600,"field":"severity","old":"none","new":"medium"}]}