{"id":"CVE-2026-43410","summary":"firmware: stratix10-rsu: Fix NULL pointer dereference when RSU is disabled","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: stratix10-rsu: Fix NULL pointer dereference when RSU is disabled\n\nWhen the Remote System Update (RSU) isn't enabled in the First Stage\nBoot Loader (FSBL), the driver encounters a NULL pointer dereference when\nexcute svc_normal_to_secure_thread() thread, resulting in a kernel panic:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000008\nMem abort info:\n...\nData abort info:\n...\n[0000000000000008] user address but active_mm is swapper\nInternal error: Oops: 0000000096000004 [#1]  SMP\nModules linked in:\nCPU: 0 UID: 0 PID: 79 Comm: svc_smc_hvc_thr Not tainted 6.19.0-rc8-yocto-standard+ #59 PREEMPT\nHardware name: SoCFPGA Stratix 10 SoCDK (DT)\npstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : svc_normal_to_secure_thread+0x38c/0x990\nlr : svc_normal_to_secure_thread+0x144/0x990\n...\nCall trace:\n svc_normal_to_secure_thread+0x38c/0x990 (P)\n kthread+0x150/0x210\n ret_from_fork+0x10/0x20\nCode: 97cfc113 f9400260 aa1403e1 f9400400 (f9400402)\n---[ end trace 0000000000000000 ]---\n\nThe issue occurs because rsu_send_async_msg() fails when RSU is not enabled\nin firmware, causing the channel to be freed via stratix10_svc_free_channel().\nHowever, the probe function continues execution and registers\nsvc_normal_to_secure_thread(), which subsequently attempts to access the\nalready-freed channel, triggering the NULL pointer dereference.\n\nFix this by properly cleaning up the async client and returning early on\nfailure, preventing the thread from being used with an invalid channel.","modified":"2026-07-08T07:53:28.144423043Z","published":"2026-05-08T14:21:48.885Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43410.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c45f7263100cece247dd3fa5fe277bd97fdb5687"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43410.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43410"},{"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":"15847537b623f844d9a08da99ff4568315e1d4f8"},{"fixed":"aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a"},{"fixed":"c45f7263100cece247dd3fa5fe277bd97fdb5687"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43410.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43410.json"}}],"schema_version":"1.7.5"}