{"id":"AZL-67589","summary":"CVE-2025-39848 affecting package kernel for versions less than 6.6.112.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nax25: properly unshare skbs in ax25_kiss_rcv()\n\nBernard Pidoux reported a regression apparently caused by commit\nc353e8983e0d (\"net: introduce per netns packet chains\").\n\nskb-\u003edev becomes NULL and we crash in __netif_receive_skb_core().\n\nBefore above commit, different kind of bugs or corruptions could happen\nwithout a major crash.\n\nBut the root cause is that ax25_kiss_rcv() can queue/mangle input skb\nwithout checking if this skb is shared or not.\n\nMany thanks to Bernard Pidoux for his help, diagnosis and tests.\n\nWe had a similar issue years ago fixed with commit 7aaed57c5c28\n(\"phonet: properly unshare skbs in phonet_rcv()\").","modified":"2026-04-01T05:21:15.363006Z","published":"2025-09-19T16:15:43Z","upstream":["CVE-2025-39848"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39848"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.112.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-67589.json"}}],"schema_version":"1.7.5"}