{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2022-50256 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2022-50256 is a high-severity use after free vulnerability in Linux kernel, published on 15 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2022-50256 and fix it if it is affected.\n\nWhat it is: CVE-2022-50256 is a high-severity use after free vulnerability in Linux kernel, published on 15 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2022-50256 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2022-50256/ (Markdown: https://insights.sbomify.com/CVE-2022-50256/index.md)","id":"CVE-2022-50256","markdown":"https://insights.sbomify.com/CVE-2022-50256/index.md","name":"CVE-2022-50256","record":{"aliases":["AZL-70765","DEBIAN-CVE-2022-50256","GHSA-qh76-9567-4h37","ROOT-OS-DEBIAN-11-CVE-2022-50256","ROOT-OS-UBUNTU-2204-CVE-2022-50256","UBUNTU-CVE-2022-50256"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel DRM driver","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel's meson DRM driver allows attackers to cause a denial of service or potentially execute code via dangling references.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/meson: remove drm bridges at aggregate driver unbind time\n\ndrm bridges added by meson_encoder_hdmi_init and meson_encoder_cvbs_init\nwere not manually removed at module unload time, which caused dangling\nreferences to freed memory to remain linked in the global bridge_list.\n\nWhen loading the driver modules back in, the same functions would again\ncall drm_bridge_add, and when traversing the global bridge_list, would\nend up peeking into freed memory.\n\nOnce again KASAN revealed the problem:\n\n[  +0.000095] =============================================================\n[  +0.000008] BUG: KASAN: use-after-free in __list_add_valid+0x9c/0x120\n[  +0.000018] Read of size 8 at addr ffff00003da291f0 by task modprobe/2483\n\n[  +0.000018] CPU: 3 PID: 2483 Comm: modprobe Tainted: G         C O      5.19.0-rc6-lrmbkasan+ #1\n[  +0.000011] Hardware name: Hardkernel ODROID-N2Plus (DT)\n[  +0.000008] Call trace:\n[  +0.000006]  dump_backtrace+0x1ec/0x280\n[  +0.000012]  show_stack+0x24/0x80\n[  +0.000008]  dump_stack_lvl+0x98/0xd4\n[  +0.000011]  print_address_description.constprop.0+0x80/0x520\n[  +0.000011]  print_report+0x128/0x260\n[  +0.000008]  kasan_report+0xb8/0xfc\n[  +0.000008]  __asan_report_load8_noabort+0x3c/0x50\n[  +0.000009]  __list_add_valid+0x9c/0x120\n[  +0.000009]  drm_bridge_add+0x6c/0x104 [drm]\n[  +0.000165]  dw_hdmi_probe+0x1900/0x2360 [dw_hdmi]\n[  +0.000022]  meson_dw_hdmi_bind+0x520/0x814 [meson_dw_hdmi]\n[  +0.000014]  component_bind+0x174/0x520\n[  +0.000012]  component_bind_all+0x1a8/0x38c\n[  +0.000010]  meson_drv_bind_master+0x5e8/0xb74 [meson_drm]\n[  +0.000032]  meson_drv_bind+0x20/0x2c [meson_drm]\n[  +0.000027]  try_to_bring_up_aggregate_device+0x19c/0x390\n[  +0.000010]  component_master_add_with_match+0x1c8/0x284\n[  +0.000009]  meson_drv_probe+0x274/0x280 [meson_drm]\n[  +0.000026]  platform_probe+0xd0/0x220\n[  +0.000009]  really_probe+0x3ac/0xa80\n[  +0.000009]  __driver_probe_device+0x1f8/0x400\n[  +0.000009]  driver_probe_device+0x68/0x1b0\n[  +0.000009]  __driver_attach+0x20c/0x480\n[  +0.000008]  bus_for_each_dev+0x114/0x1b0\n[  +0.000009]  driver_attach+0x48/0x64\n[  +0.000008]  bus_add_driver+0x390/0x564\n[  +0.000009]  driver_register+0x1a8/0x3e4\n[  +0.000009]  __platform_driver_register+0x6c/0x94\n[  +0.000008]  meson_drm_platform_driver_init+0x3c/0x1000 [meson_drm]\n[  +0.000027]  do_one_initcall+0xc4/0x2b0\n[  +0.000011]  do_init_module+0x154/0x570\n[  +0.000011]  load_module+0x1a78/0x1ea4\n[  +0.000008]  __do_sys_init_module+0x184/0x1cc\n[  +0.000009]  __arm64_sys_init_module+0x78/0xb0\n[  +0.000009]  invoke_syscall+0x74/0x260\n[  +0.000009]  el0_svc_common.constprop.0+0xcc/0x260\n[  +0.000008]  do_el0_svc+0x50/0x70\n[  +0.000007]  el0_svc+0x68/0x1a0\n[  +0.000012]  el0t_64_sync_handler+0x11c/0x150\n[  +0.000008]  el0t_64_sync+0x18c/0x190\n\n[  +0.000016] Allocated by task 879:\n[  +0.000008]  kasan_save_stack+0x2c/0x5c\n[  +0.000011]  __kasan_kmalloc+0x90/0xd0\n[  +0.000007]  __kmalloc+0x278/0x4a0\n[  +0.000011]  mpi_resize+0x13c/0x1d0\n[  +0.000011]  mpi_powm+0xd24/0x1570\n[  +0.000009]  rsa_enc+0x1a4/0x30c\n[  +0.000009]  pkcs1pad_verify+0x3f0/0x580\n[  +0.000009]  public_key_verify_signature+0x7a8/0xba4\n[  +0.000010]  public_key_verify_signature_2+0x40/0x60\n[  +0.000008]  verify_signature+0xb4/0x114\n[  +0.000008]  pkcs7_validate_trust_one.constprop.0+0x3b8/0x574\n[  +0.000009]  pkcs7_validate_trust+0xb8/0x15c\n[  +0.000008]  verify_pkcs7_message_sig+0xec/0x1b0\n[  +0.000012]  verify_pkcs7_signature+0x78/0xac\n[  +0.000007]  mod_verify_sig+0x110/0x190\n[  +0.000009]  module_sig_check+0x114/0x1e0\n[  +0.000009]  load_module+0xa0/0x1ea4\n[  +0.000008]  __do_sys_init_module+0x184/0x1cc\n[  +0.000008]  __arm64_sys_init_module+0x78/0xb0\n[  +0.000008]  invoke_syscall+0x74/0x260\n[  +0.000009]  el0_svc_common.constprop.0+0x1a8/0x260\n[  +0.000008]  do_el0_svc+0x50/0x70\n[  +0.000007]  el0_svc+0x68/0x1a0\n[  +0.000009]  el0t_64_sync_handler+0x11c/0x150\n[  +0.000009]  el0t_64\n---truncated---","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"drm/meson: remove drm bridges at aggregate driver unbind time","id":"CVE-2022-50256","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2022"},"n_packages":0,"n_references":3,"next":{"headline":"xen/gntdev: Prevent leaking grants","id":"CVE-2022-50257"},"packages":[],"prev":{"headline":"tracing: Fix reading strings from synthetic events","id":"CVE-2022-50255"},"products":["Linux"],"published":"2025-09-15","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-15","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel's meson DRM driver allows attackers to cause a denial of service or potentially execute code via dangling references.","url":"https://insights.sbomify.com/CVE-2022-50256/"}