{"id":"CVE-2026-72048","summary":"ieee802154: ca8210: fix cas_ctl leak on spi_async failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix cas_ctl leak on spi_async failure\n\nca8210_spi_transfer() allocates cas_ctl with kzalloc_obj(GFP_ATOMIC)\nand relies entirely on the SPI completion callback\nca8210_spi_transfer_complete() to free it.\n\nThe spi_async() API only invokes the completion callback on successful\nsubmission.  On failure it returns a negative error code without ever\nqueuing the callback, which leaves cas_ctl and its embedded spi_message\nand spi_transfer orphaned.  Every kfree(cas_ctl) in the driver is\ninside the completion callback, so there is no other reclamation path.\n\nca8210_spi_transfer() is called from ca8210_spi_exchange(), the\ninterrupt handler ca8210_interrupt_handler(), and from the retry path\ninside the completion callback itself.  The exchange and interrupt\nhandler paths loop on -EBUSY, so under sustained SPI bus contention\nevery retry iteration leaks a fresh cas_ctl (~600 bytes per\noccurrence).\n\nFix it by freeing cas_ctl on the spi_async() error path.  While here,\ncorrect the misleading error string: the function calls spi_async(),\nnot spi_sync().","modified":"2026-08-18T03:30:50.485916217Z","published":"2026-08-15T05:52:06.253Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72048.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/460c5cd51e4d7d15b317f178f42cfcb666c0fe91"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e3630fbb6aabb844bbf35746dee0bf3894100c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b07aea90dbc6e188c74c100af64b77b9482ffc65"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9071dc7889bef42590e04fbf3e56cc65e1e5e6e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cb5cca1d2a908ddd5e357971de0f2009617b8d6a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d4a397fe803c2d157f6ebb068b802ef75fbf109e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e09390e439bd7cca30dd10893b1f64802961667a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fe90605b651573d30be8293ff5be40e3d7023117"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72048.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72048"},{"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":"ded845a781a578dfb0b5b2c138e5a067aa3b1242"},{"fixed":"460c5cd51e4d7d15b317f178f42cfcb666c0fe91"},{"fixed":"b07aea90dbc6e188c74c100af64b77b9482ffc65"},{"fixed":"fe90605b651573d30be8293ff5be40e3d7023117"},{"fixed":"b9071dc7889bef42590e04fbf3e56cc65e1e5e6e"},{"fixed":"d4a397fe803c2d157f6ebb068b802ef75fbf109e"},{"fixed":"cb5cca1d2a908ddd5e357971de0f2009617b8d6a"},{"fixed":"7e3630fbb6aabb844bbf35746dee0bf3894100c7"},{"fixed":"e09390e439bd7cca30dd10893b1f64802961667a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72048.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72048.json"}}],"schema_version":"1.9.0"}