{"id":"CVE-2026-64599","state":"PUBLISHED","title":"crypto: amlogic - avoid double cleanup in meson_crypto_probe()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: amlogic - avoid double cleanup in meson_crypto_probe()\n\nWhen meson_allocate_chanlist() fails after a partial allocation, it already\nunwinds the allocated chanlist state through its local error path.\nmeson_crypto_probe() then jump to error_flow and calls\nmeson_free_chanlist() again, causing the same per-flow resources to be torn\ndown twice. In the reproduced failure path, the second teardown\nre-entered crypto_engine_exit() on an already destroyed worker and KASAN\nreported a slab-use-after-free in kthread_destroy_worker().\n\nPrevent double-free by handling partial allocation failures locally within\nmeson_allocate_chanlist() and skipping the outer cleanup path.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable.\n\nThe bug was reproduced in a QEMU x86_64 guest booted with KASAN on v7.1,\nusing the reproducer under tools/testing/meson_crypto_probe. The reproducer\nforces the second dma_alloc_attrs() call in the gxl-crypto probe path to\nreturn NULL, making meson_allocate_chanlist() fail after partial\ninitialization. On the unpatched kernel this reliably triggered a\nslab-use-after-free. With this fix applied, the same reproducer no longer\nemits any KASAN report and the probe fails cleanly with -ENOMEM.\n\n    ==================================================================\n    BUG: KASAN: slab-use-after-free in kthread_destroy_worker+0xb2/0xd0\n    Read of size 8 at addr ff1100010c057a68 by task insmod/265\n\n    CPU: 1 UID: 0 PID: 265 Comm: insmod Tainted: G           O        7.1.0-rc2-00376-g810af9adc907-dirty #10 PREEMPT(lazy)\n    Tainted: [O]=OOT_MODULE\n    Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x68/0xa0\n     print_report+0xcb/0x5e0\n     ? __virt_addr_valid+0x21d/0x3f0\n     ? kthread_destroy_worker+0xb2/0xd0\n     ? kthread_destroy_worker+0xb2/0xd0\n     kasan_report+0xca/0x100\n     ? kthread_destroy_worker+0xb2/0xd0\n     kthread_destroy_worker+0xb2/0xd0\n     meson_crypto_probe+0x4d0/0xc10 [amlogic_gxl_crypto]\n     platform_probe+0x99/0x140\n     really_probe+0x1c6/0x6a0\n     ? __pfx___device_attach_driver+0x10/0x10\n     __driver_probe_device+0x248/0x310\n     ? acpi_driver_match_device+0xb0/0x100\n     driver_probe_device+0x48/0x210\n     ? __pfx___device_attach_driver+0x10/0x10\n     __device_attach_driver+0x160/0x320\n     bus_for_each_drv+0x104/0x190\n     ? __pfx_bus_for_each_drv+0x10/0x10\n     ? _raw_spin_unlock_irqrestore+0x2c/0x50\n     __device_attach+0x19d/0x3b0\n     ? __pfx___device_attach+0x10/0x10\n     ? do_raw_spin_unlock+0x53/0x220\n     device_initial_probe+0x78/0xa0\n     bus_probe_device+0x5b/0x130\n     device_add+0xcfd/0x1430\n     ? __pfx_device_add+0x10/0x10\n     ? insert_resource+0x34/0x50\n     ? lock_release+0xc9/0x290\n     platform_device_add+0x24e/0x590\n     ? __pfx_meson_crypto_probe_repro_init+0x10/0x10 [meson_crypto_probe_repro]\n     meson_crypto_probe_repro_init+0x330/0xff0 [meson_crypto_probe_repro]\n     do_one_initcall+0xc0/0x450\n     ? __pfx_do_one_initcall+0x10/0x10\n     ? _raw_spin_unlock_irqrestore+0x2c/0x50\n     ? __create_object+0x59/0x80\n     ? kasan_unpoison+0x27/0x60\n     do_init_module+0x27b/0x7d0\n     ? __pfx_do_init_module+0x10/0x10\n     ? kasan_quarantine_put+0x84/0x1d0\n     ? kfree+0x32c/0x510\n     ? load_module+0x561e/0x5ff0\n     load_module+0x54fe/0x5ff0\n     ? __pfx_load_module+0x10/0x10\n     ? security_file_permission+0x20/0x40\n     ? kernel_read_file+0x23d/0x6e0\n     ? mmap_region+0x235/0x4a0\n     ? __pfx_kernel_read_file+0x10/0x10\n     ? __file_has_perm+0x2c0/0x3e0\n     init_module_from_file+0x158/0x180\n     ? __pfx_init_module_from_file+0x10/0x10\n     ? __lock_acquire+0x45a/0x1ba0\n     ? idempotent_init_module+0x315/0x610\n     ? lock_release+0xc9/0x290\n     ? lock\n---truncated---","publishedAt":"2026-08-06T07:13:53.328Z","updatedAt":"2026-10-19T20:48:43.746Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"c2c48aa7a6be36d4c93da75d14d4b4f2f4168c81","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"c80360b4e85099fc3835378a96a59c0a2480fb07","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"5b452019a4127f63c1f2147237fc287d1581f606","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"f30e2b879bda14bc3e1524fba6f8ab9ec119da90","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"6effdbaca3cd8354540bdf42c7f5fb84412afeb7","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"84a00be9b736aa5dce902a290f62cbbbdcfab9ed","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"6dda8406d8a3da2519c8b388d443d7357839cb63","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"6d827ade51a24e18d81afb9f32756d339520a14c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/amlogic/amlogic-gxl-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/amlogic/amlogic-gxl-core.c"]}],"references":["https://git.kernel.org/stable/c/c2c48aa7a6be36d4c93da75d14d4b4f2f4168c81","https://git.kernel.org/stable/c/c80360b4e85099fc3835378a96a59c0a2480fb07","https://git.kernel.org/stable/c/5b452019a4127f63c1f2147237fc287d1581f606","https://git.kernel.org/stable/c/f30e2b879bda14bc3e1524fba6f8ab9ec119da90","https://git.kernel.org/stable/c/6effdbaca3cd8354540bdf42c7f5fb84412afeb7","https://git.kernel.org/stable/c/84a00be9b736aa5dce902a290f62cbbbdcfab9ed","https://git.kernel.org/stable/c/6dda8406d8a3da2519c8b388d443d7357839cb63","https://git.kernel.org/stable/c/6d827ade51a24e18d81afb9f32756d339520a14c"],"weaknesses":["CWE-415"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64599.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64599","state":"PUBLISHED","datePublished":"2026-08-06T07:13:53.328Z","dateUpdated":"2026-10-19T20:48:43.746Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.799Z"},"containers":{"cna":{"title":"crypto: amlogic - avoid double cleanup in meson_crypto_probe()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: amlogic - avoid double cleanup in meson_crypto_probe()\n\nWhen meson_allocate_chanlist() fails after a partial allocation, it already\nunwinds the allocated chanlist state through its local error path.\nmeson_crypto_probe() then jump to error_flow and calls\nmeson_free_chanlist() again, causing the same per-flow resources to be torn\ndown twice. In the reproduced failure path, the second teardown\nre-entered crypto_engine_exit() on an already destroyed worker and KASAN\nreported a slab-use-after-free in kthread_destroy_worker().\n\nPrevent double-free by handling partial allocation failures locally within\nmeson_allocate_chanlist() and skipping the outer cleanup path.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable.\n\nThe bug was reproduced in a QEMU x86_64 guest booted with KASAN on v7.1,\nusing the reproducer under tools/testing/meson_crypto_probe. The reproducer\nforces the second dma_alloc_attrs() call in the gxl-crypto probe path to\nreturn NULL, making meson_allocate_chanlist() fail after partial\ninitialization. On the unpatched kernel this reliably triggered a\nslab-use-after-free. With this fix applied, the same reproducer no longer\nemits any KASAN report and the probe fails cleanly with -ENOMEM.\n\n    ==================================================================\n    BUG: KASAN: slab-use-after-free in kthread_destroy_worker+0xb2/0xd0\n    Read of size 8 at addr ff1100010c057a68 by task insmod/265\n\n    CPU: 1 UID: 0 PID: 265 Comm: insmod Tainted: G           O        7.1.0-rc2-00376-g810af9adc907-dirty #10 PREEMPT(lazy)\n    Tainted: [O]=OOT_MODULE\n    Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x68/0xa0\n     print_report+0xcb/0x5e0\n     ? __virt_addr_valid+0x21d/0x3f0\n     ? kthread_destroy_worker+0xb2/0xd0\n     ? kthread_destroy_worker+0xb2/0xd0\n     kasan_report+0xca/0x100\n     ? kthread_destroy_worker+0xb2/0xd0\n     kthread_destroy_worker+0xb2/0xd0\n     meson_crypto_probe+0x4d0/0xc10 [amlogic_gxl_crypto]\n     platform_probe+0x99/0x140\n     really_probe+0x1c6/0x6a0\n     ? __pfx___device_attach_driver+0x10/0x10\n     __driver_probe_device+0x248/0x310\n     ? acpi_driver_match_device+0xb0/0x100\n     driver_probe_device+0x48/0x210\n     ? __pfx___device_attach_driver+0x10/0x10\n     __device_attach_driver+0x160/0x320\n     bus_for_each_drv+0x104/0x190\n     ? __pfx_bus_for_each_drv+0x10/0x10\n     ? _raw_spin_unlock_irqrestore+0x2c/0x50\n     __device_attach+0x19d/0x3b0\n     ? __pfx___device_attach+0x10/0x10\n     ? do_raw_spin_unlock+0x53/0x220\n     device_initial_probe+0x78/0xa0\n     bus_probe_device+0x5b/0x130\n     device_add+0xcfd/0x1430\n     ? __pfx_device_add+0x10/0x10\n     ? insert_resource+0x34/0x50\n     ? lock_release+0xc9/0x290\n     platform_device_add+0x24e/0x590\n     ? __pfx_meson_crypto_probe_repro_init+0x10/0x10 [meson_crypto_probe_repro]\n     meson_crypto_probe_repro_init+0x330/0xff0 [meson_crypto_probe_repro]\n     do_one_initcall+0xc0/0x450\n     ? __pfx_do_one_initcall+0x10/0x10\n     ? _raw_spin_unlock_irqrestore+0x2c/0x50\n     ? __create_object+0x59/0x80\n     ? kasan_unpoison+0x27/0x60\n     do_init_module+0x27b/0x7d0\n     ? __pfx_do_init_module+0x10/0x10\n     ? kasan_quarantine_put+0x84/0x1d0\n     ? kfree+0x32c/0x510\n     ? load_module+0x561e/0x5ff0\n     load_module+0x54fe/0x5ff0\n     ? __pfx_load_module+0x10/0x10\n     ? security_file_permission+0x20/0x40\n     ? kernel_read_file+0x23d/0x6e0\n     ? mmap_region+0x235/0x4a0\n     ? __pfx_kernel_read_file+0x10/0x10\n     ? __file_has_perm+0x2c0/0x3e0\n     init_module_from_file+0x158/0x180\n     ? __pfx_init_module_from_file+0x10/0x10\n     ? __lock_acquire+0x45a/0x1ba0\n     ? idempotent_init_module+0x315/0x610\n     ? lock_release+0xc9/0x290\n     ? lock\n---truncated---"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"c2c48aa7a6be36d4c93da75d14d4b4f2f4168c81","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"c80360b4e85099fc3835378a96a59c0a2480fb07","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"5b452019a4127f63c1f2147237fc287d1581f606","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"f30e2b879bda14bc3e1524fba6f8ab9ec119da90","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"6effdbaca3cd8354540bdf42c7f5fb84412afeb7","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"84a00be9b736aa5dce902a290f62cbbbdcfab9ed","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"6dda8406d8a3da2519c8b388d443d7357839cb63","versionType":"git"},{"version":"48fe583fe54177bfb80f348e2a5cc34c3f710095","status":"affected","lessThan":"6d827ade51a24e18d81afb9f32756d339520a14c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/amlogic/amlogic-gxl-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/amlogic/amlogic-gxl-core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c2c48aa7a6be36d4c93da75d14d4b4f2f4168c81"},{"url":"https://git.kernel.org/stable/c/c80360b4e85099fc3835378a96a59c0a2480fb07"},{"url":"https://git.kernel.org/stable/c/5b452019a4127f63c1f2147237fc287d1581f606"},{"url":"https://git.kernel.org/stable/c/f30e2b879bda14bc3e1524fba6f8ab9ec119da90"},{"url":"https://git.kernel.org/stable/c/6effdbaca3cd8354540bdf42c7f5fb84412afeb7"},{"url":"https://git.kernel.org/stable/c/84a00be9b736aa5dce902a290f62cbbbdcfab9ed"},{"url":"https://git.kernel.org/stable/c/6dda8406d8a3da2519c8b388d443d7357839cb63"},{"url":"https://git.kernel.org/stable/c/6d827ade51a24e18d81afb9f32756d339520a14c"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only in the Amlogic GXL platform driver probe path (meson_crypto_probe → meson_allocate_chanlist error unwind), via boot/deferred probe, module bind, or local sysfs rebind—not from network, adjacent, or physical I/O.\nAC:L - Once meson_allocate_chanlist() fails after partial engine/DMA setup, the outer error_flow double-calls meson_free_chanlist() deterministically; a local attacker can induce that ENOMEM with memory pressure or allocation failure, with no race beyond their control.\nPR:L - On Amlogic GXL devices the DT node is status=okay and probes automatically (including deferred retries when clocks/IRQs appear); an ordinary local user can apply memory pressure during that probe without CAP_SYS_MODULE or init-namespace root, matching the higher-severity choice over PR:H.\nUI:N - No victim action such as opening a file or mounting a filesystem is required; probe error unwinding runs entirely in kernel context once allocation failure is induced.\nS:U - The double-free/UAF corrupts host kernel heap and crypto-engine worker state within the same kernel security authority and does not cross a VM, IOMMU, or sandbox boundary by itself.\nC:H - The second teardown re-enters crypto_engine_exit()/kthread_destroy_worker() and dma_free_coherent() on already freed objects (confirmed KASAN slab-UAF), which can expose arbitrary kernel memory via attacker-controlled reuse of the freed slabs.\nI:H - Double-free of kthread_worker and DMA descriptor buffers yields overlapping live objects and classic heap corruption primitives that can be leveraged for arbitrary kernel writes or control-flow hijacking, not merely a clean crash.\nA:H - The use-after-free and double-free paths reliably cause kernel oops/panic (KASAN reported slab-UAF in kthread_destroy_worker), and NULL engine pointers on early failure also crash via crypto_engine_exit(NULL)."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:58:21.956Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-64599","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:43:28.785697Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-415","lang":"en","type":"CWE","description":"CWE-415 Double Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T20:48:43.746Z"}}]}}}