{"id":"CVE-2026-43410","state":"PUBLISHED","title":"firmware: stratix10-rsu: Fix NULL pointer dereference when RSU is disabled","description":"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.","publishedAt":"2026-05-08T14:21:48.885Z","updatedAt":"2026-05-11T22:24:02.917Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"15847537b623f844d9a08da99ff4568315e1d4f8","status":"affected","lessThan":"aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a","versionType":"git"},{"version":"15847537b623f844d9a08da99ff4568315e1d4f8","status":"affected","lessThan":"c45f7263100cece247dd3fa5fe277bd97fdb5687","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/stratix10-rsu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"6.19.9","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/stratix10-rsu.c"]}],"references":["https://git.kernel.org/stable/c/aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a","https://git.kernel.org/stable/c/c45f7263100cece247dd3fa5fe277bd97fdb5687"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43410.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43410","state":"PUBLISHED","datePublished":"2026-05-08T14:21:48.885Z","dateUpdated":"2026-05-11T22:24:02.917Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:56.008Z"},"containers":{"cna":{"title":"firmware: stratix10-rsu: Fix NULL pointer dereference when RSU is disabled","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"15847537b623f844d9a08da99ff4568315e1d4f8","status":"affected","lessThan":"aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a","versionType":"git"},{"version":"15847537b623f844d9a08da99ff4568315e1d4f8","status":"affected","lessThan":"c45f7263100cece247dd3fa5fe277bd97fdb5687","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/stratix10-rsu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"6.19.9","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/stratix10-rsu.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a"},{"url":"https://git.kernel.org/stable/c/c45f7263100cece247dd3fa5fe277bd97fdb5687"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:24:02.917Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}