{"id":"AZL-102227","summary":"CVE-2026-90088 affecting package kernel 6.6.150.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop\n\nrfcomm_apply_pn() accepts the MTU value from a remote PN (Parameter\nNegotiation) frame without checking for zero. When the remote peer\nsends an MTU of zero, d-\u003emtu is set to 0. This causes the sendmsg\npath to enter an infinite loop when fragmenting data, as each fragment\nhas size == min_t(size_t, len, 0) == 0, so the remaining length never\ndecreases. The infinite allocation of zero-length skbs exhausts all\nsystem memory.\n\nFix by clamping d-\u003emtu to RFCOMM_DEFAULT_MTU when the negotiated\nvalue is zero, consistent with the initial value assigned in\nrfcomm_dlc_alloc().","modified":"2026-09-18T14:17:49.943214018Z","published":"2026-09-17T17:16:59Z","upstream":["CVE-2026-90088"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90088"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-102227.json"}}],"schema_version":"1.9.0"}