{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-45943 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-45943 is a high-severity vulnerability in Linux kernel, published on 27 May 2026. 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-2026-45943 and fix it if it is affected.\n\nWhat it is: CVE-2026-45943 is a high-severity vulnerability in Linux kernel, published on 27 May 2026. 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-2026-45943 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-2026-45943/ (Markdown: https://insights.sbomify.com/CVE-2026-45943/index.md)","id":"CVE-2026-45943","markdown":"https://insights.sbomify.com/CVE-2026-45943/index.md","name":"CVE-2026-45943","record":{"aliases":["AZL-88422","BELL-CVE-2026-45943","DEBIAN-CVE-2026-45943","GHSA-w8vj-mr98-9j85","ROOT-OS-DEBIAN-12-CVE-2026-45943","ROOT-OS-UBUNTU-2404-CVE-2026-45943","UBUNTU-CVE-2026-45943"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel EROFS","requires_auth":"low_privilege","summary":"A NULL pointer dereference in the Linux kernel EROFS filesystem can cause a system crash when reading compressed inline data.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.1,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix inline data read failure for ztailpacking pclusters\n\nCompressed folios for ztailpacking pclusters must be valid before adding\nthese pclusters to I/O chains. Otherwise, z_erofs_decompress_pcluster()\nmay assume they are already valid and then trigger a NULL pointer\ndereference.\n\nIt is somewhat hard to reproduce because the inline data is in the same\nblock as the tail of the compressed indexes, which are usually read just\nbefore. However, it may still happen if a fatal signal arrives while\nread_mapping_folio() is running, as shown below:\n\n erofs: (device dm-1): z_erofs_pcluster_begin: failed to get inline data -4\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n\n ...\n\n pc : z_erofs_decompress_queue+0x4c8/0xa14\n lr : z_erofs_decompress_queue+0x160/0xa14\n sp : ffffffc08b3eb3a0\n x29: ffffffc08b3eb570 x28: ffffffc08b3eb418 x27: 0000000000001000\n x26: ffffff8086ebdbb8 x25: ffffff8086ebdbb8 x24: 0000000000000001\n x23: 0000000000000008 x22: 00000000fffffffb x21: dead000000000700\n x20: 00000000000015e7 x19: ffffff808babb400 x18: ffffffc089edc098\n x17: 00000000c006287d x16: 00000000c006287d x15: 0000000000000004\n x14: ffffff80ba8f8000 x13: 0000000000000004 x12: 00000006589a77c9\n x11: 0000000000000015 x10: 0000000000000000 x9 : 0000000000000000\n x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f\n x5 : 0000000000000040 x4 : ffffffffffffffe0 x3 : 0000000000000020\n x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000\n Call trace:\n  z_erofs_decompress_queue+0x4c8/0xa14\n  z_erofs_runqueue+0x908/0x97c\n  z_erofs_read_folio+0x128/0x228\n  filemap_read_folio+0x68/0x128\n  filemap_get_pages+0x44c/0x8b4\n  filemap_read+0x12c/0x5b8\n  generic_file_read_iter+0x4c/0x15c\n  do_iter_readv_writev+0x188/0x1e0\n  vfs_iter_read+0xac/0x1a4\n  backing_file_read_iter+0x170/0x34c\n  ovl_read_iter+0xf0/0x140\n  vfs_read+0x28c/0x344\n  ksys_read+0x80/0xf0\n  __arm64_sys_read+0x24/0x34\n  invoke_syscall+0x60/0x114\n  el0_svc_common+0x88/0xe4\n  do_el0_svc+0x24/0x30\n  el0_svc+0x40/0xa8\n  el0t_64_sync_handler+0x70/0xbc\n  el0t_64_sync+0x1bc/0x1c0\n\nFix this by reading the inline data before allocating and adding\nthe pclusters to the I/O chains.","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":"erofs: fix inline data read failure for ztailpacking pclusters","id":"CVE-2026-45943","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"iommu/vt-d: Clear Present bit before tearing down context entry","id":"CVE-2026-45944"},"packages":[],"prev":{"headline":"ext4: fix e4b bitmap inconsistency reports","id":"CVE-2026-45942"},"products":["Linux"],"published":"2026-05-27","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":"2026-10-21","vendors":["Linux"]},"summary":"A NULL pointer dereference in the Linux kernel EROFS filesystem can cause a system crash when reading compressed inline data.","url":"https://insights.sbomify.com/CVE-2026-45943/"}