{"cve":{"cve_id":"CVE-2026-53320","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: reject zero bd_oblocknr in nilfs_ioctl_mark_blocks_dirty()\n\nnilfs_ioctl_mark_blocks_dirty() uses bd_oblocknr to detect dead blocks\nby comparing it with the current block number bd_blocknr. If they differ,\nthe block is considered dead and skipped.\n\nHowever, bd_oblocknr should never be 0 since block 0 typically stores the\nprimary superblock and is never a valid GC target block. A corrupted ioctl\nrequest with bd_oblocknr set to 0 causes the comparison to incorrectly\nmatch when the lookup returns -ENOENT and sets bd_blocknr to 0, bypassing\nthe dead block check and calling nilfs_bmap_mark() on a non-existent\nblock. This causes nilfs_btree_do_lookup() to return -ENOENT, triggering\nthe WARN_ON(ret == -ENOENT).\n\nFix this by rejecting ioctl requests with bd_oblocknr set to 0 at the\nbeginning of each iteration.\n\n[ryusuke: slightly modified the commit message and comments for accuracy]","published_at":"2026-06-26T19:41:11.932000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/e0a0c4903cbba351f0f5b5d104960d3a5b23202f","https://git.kernel.org/stable/c/9472d37799a0b9ff9b99639f35961ac2f0b3c9be","https://git.kernel.org/stable/c/65e07964b4b2daf9a54e686cf0fa72d74a9648a8","https://git.kernel.org/stable/c/b88f905d4449b70da6bda547be546e365e44352e","https://git.kernel.org/stable/c/4525658002be3ad310b16bf8db48c8adb6a55d32","https://git.kernel.org/stable/c/e5ff0ba4b6983cdbcc826efc201e7179ece5d46f","https://git.kernel.org/stable/c/94094e70fe292c9566502772d4d4d6d6a99204b1","https://git.kernel.org/stable/c/be3e5d10643d3be1cbac9d9939f220a99253f980"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:52.348775Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"e0a0c4903cbba351f0f5b5d104960d3a5b23202f","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:e0a0c4903cbba351f0f5b5d104960d3a5b23202f"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"9472d37799a0b9ff9b99639f35961ac2f0b3c9be","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:9472d37799a0b9ff9b99639f35961ac2f0b3c9be"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"65e07964b4b2daf9a54e686cf0fa72d74a9648a8","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:65e07964b4b2daf9a54e686cf0fa72d74a9648a8"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"b88f905d4449b70da6bda547be546e365e44352e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:b88f905d4449b70da6bda547be546e365e44352e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"4525658002be3ad310b16bf8db48c8adb6a55d32","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:4525658002be3ad310b16bf8db48c8adb6a55d32"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"e5ff0ba4b6983cdbcc826efc201e7179ece5d46f","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:e5ff0ba4b6983cdbcc826efc201e7179ece5d46f"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"94094e70fe292c9566502772d4d4d6d6a99204b1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:94094e70fe292c9566502772d4d4d6d6a99204b1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7942b919f7321f95a777d396ff7894a7a83dc9b0","version_start_inclusive":true,"version_end":"be3e5d10643d3be1cbac9d9939f220a99253f980","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7942b919f7321f95a777d396ff7894a7a83dc9b0:be3e5d10643d3be1cbac9d9939f220a99253f980"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"2.6.30","version_start_inclusive":true,"version_end":"2.6.30","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:2.6.30:2.6.30"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"2.6.30","version_end_inclusive":false,"cpe23_uri":"cv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published","source":null}]}