{"id":"CVE-2026-114038","kind":"vulnerability","aliases":["CVE-2026-114038"],"related":[],"title":"device-mapper-multipath: trailing percent in command leaks daemon memory","description":"A flaw was found in device-mapper-multipath. A local user can trigger an out-of-bounds read by sending a command with a format string ending in a trailing percent character to the multipath daemon. This issue can allow the user to expose unintended daemon memory, leading to information disclosure, or cause the daemon to crash, resulting in a Denial of Service (DoS).","summary":"A local user who sends a command ending in a trailing percent character to the multipath daemon can trigger an out-of-bounds read. The attacker can expose unintended daemon memory or crash the daemon.","severity":"medium","cvss":5.1,"epss":0.00116,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["device-mapper-multipath","infrastructure","linux","multipath-tools","self-hosted"],"not_affected_if":["no-local-users","no-multipath-daemon"],"how_to_check":"- Check the installed version with `multipath -h` or your package manager (for example `rpm -q device-mapper-multipath` or `dpkg -l multipath-tools`)\n- Compare the result against the fixed versions listed by the vendor: unknown","fix":"- Update device-mapper-multipath to a fixed release from your distribution: unknown\n- Restrict local access to the multipath daemon socket until patched: unknown","status":"open","published_at":"2026-10-21T01:17:26+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","triaged_at":"2026-10-25T04:29:00+00:00","updated_at":"2026-10-25T04:29:00+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-25T04:29:00Z","model":"claude-haiku-5-5","output":{"fix":"- Update device-mapper-multipath to a fixed release from your distribution: unknown\n- Restrict local access to the multipath daemon socket until patched: unknown","reach":"local","title":"device-mapper-multipath: trailing percent in command leaks daemon memory","impact":"low","summary":"A local user who sends a command ending in a trailing percent character to the multipath daemon can trigger an out-of-bounds read. The attacker can expose unintended daemon memory or crash the daemon.","category":"infrastructure","nicknames":[],"who_cares":["linux","device-mapper-multipath","multipath-tools","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"local user reads daemon memory or crashes the multipath daemon","analyst_note":"Confirm affected and fixed package versions from the NVD entry and the distribution advisories; the sources give no version data.","how_to_check":"- Check the installed version with `multipath -h` or your package manager (for example `rpm -q device-mapper-multipath` or `dpkg -l multipath-tools`)\n- Compare the result against the fixed versions listed by the vendor: unknown","needs_analyst":true,"not_affected_if":["no-multipath-daemon","no-local-users"],"who_is_affected":"Systems running the device-mapper-multipath daemon, typically Linux hosts with multipath storage such as SAN-attached servers. The attacker must already have a local account on the machine. Systems without multipath configured may not run the daemon and can likely skip it; unknown whether the sources confirm this.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000624,"input_tokens":3353,"output_tokens":577,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-114038':14A,17A '-2026':13A,16A 'allow':107C 'attack':56B 'bound':53B,84C 'caus':120C 'charact':42B,99C 'command':8A,36B,89C 'crash':63B,124C 'cve':12A,15A 'daemon':10A,46B,60B,65B,103C,113C,122C 'denial':128C 'devic':2A,19B,72C 'device-mapper-multipath':1A,18B,71C 'disclosur':118C 'dos':131C 'end':37B,94C 'expos':58B,111C 'flaw':67C 'format':92C 'found':69C 'host':29B 'inform':117C 'infrastructur':22B 'issu':105C 'lead':115C 'leak':9A 'linux':23B 'local':31B,76C 'mapper':3A,20B,73C 'memori':11A,61B,114C 'multipath':4A,21B,25B,45B,74C,102C 'multipath-tool':24B 'out-of-bound':50B,81C 'percent':6A,41B,98C 'read':54B,85C 'result':125C 'self':28B 'self-host':27B 'send':34B,87C 'servic':130C 'string':93C 'tool':26B 'trail':5A,40B,97C 'trigger':48B,79C 'unintend':59B,112C 'user':32B,77C,109C","nicknames":[],"mitigations":[],"who_affected":"Systems running the device-mapper-multipath daemon, typically Linux hosts with multipath storage such as SAN-attached servers. The attacker must already have a local account on the machine. Systems without multipath configured may not run the daemon and can likely skip it; unknown whether the sources confirm this.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T01:17:26+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","cvss_by":"secalert@redhat.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-114038","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114038","severity":null,"published_at":"2026-10-21T01:17:26+00:00","modified_at":"2026-10-22T15:25:35+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-114038","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114038","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:55+00:00","fetched_at":"2026-10-24T13:15:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}