{"id":"CVE-2026-43098","summary":"nfc: s3fwrn5: allocate rx skb before consuming bytes","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: s3fwrn5: allocate rx skb before consuming bytes\n\ns3fwrn82_uart_read() reports the number of accepted bytes to the serdev\ncore. The current code consumes bytes into recv_skb and may already\ndeliver a complete frame before allocating a fresh receive buffer.\n\nIf that alloc_skb() fails, the callback returns 0 even though it has\nalready consumed bytes, and it leaves recv_skb as NULL for the next\nreceive callback. That breaks the receive_buf() accounting contract and\ncan also lead to a NULL dereference on the next skb_put_u8().\n\nAllocate the receive skb lazily before consuming the next byte instead.\nIf allocation fails, return the number of bytes already accepted.","modified":"2026-07-08T08:09:34.338820961Z","published":"2026-05-06T07:40:28.845Z","related":["CGA-g745-8989-65mc"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43098.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/09822d3d6f68a0cdc4626e0c507324a4927f55a9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/20a57de2e79b797ed75382659d52bf4c7d9cb446"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5c14a19d5b1645cce1cb1252833d70b23635b632"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6d931680a9851481c3243689488eafed08eeff71"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7c31f7a599cf00fad3c204092a91a924126c67e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4ab0fd1c91882f2a7846b1817781c8741f7f315"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43098.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43098"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3f52c2cb7e3ada37513dabb69a22cf917dba754f"},{"fixed":"20a57de2e79b797ed75382659d52bf4c7d9cb446"},{"fixed":"e4ab0fd1c91882f2a7846b1817781c8741f7f315"},{"fixed":"d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156"},{"fixed":"7c31f7a599cf00fad3c204092a91a924126c67e4"},{"fixed":"6d931680a9851481c3243689488eafed08eeff71"},{"fixed":"09822d3d6f68a0cdc4626e0c507324a4927f55a9"},{"fixed":"5c14a19d5b1645cce1cb1252833d70b23635b632"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43098.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.136"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43098.json"}}],"schema_version":"1.7.5"}