{"id":"CVE-2026-52992","state":"PUBLISHED","title":"fs/adfs: validate nzones in adfs_validate_bblk()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/adfs: validate nzones in adfs_validate_bblk()\n\nReject ADFS disc records with a zero zone count during boot block\nvalidation, before the disc record is used.\n\nWhen nzones is 0, adfs_read_map() passes it to kmalloc_array(0, ...)\nwhich returns ZERO_SIZE_PTR, and adfs_map_layout() then writes to\ndm[-1], causing an out-of-bounds write before the allocated buffer.\n\nadfs_validate_dr0() already rejects nzones != 1 for old-format\nimages.  Add the equivalent check to adfs_validate_bblk() for\nnew-format images so that a crafted image with nzones == 0 is\nrejected at probe time.\n\nFound by syzkaller.","publishedAt":"2026-06-24T16:29:05.592Z","updatedAt":"2026-06-24T16:29:05.592Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"33aafd2418a59c96c0389d47ea09026661fa9ec6","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"1f0ed0f57f0fc87e46fe19a05435c214dc464be2","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"a11372a8b1ceaa5e950a84b3b5fbf8228f25e277","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"1586bd2d2fb436a26df20a70e78b000d34a7d159","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"60d82592ac8b5637fbed871381eb0a16df0a492e","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"dd9d3e16c2d5fa166e13dce07413be51f42c8f5d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/adfs/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/adfs/super.c"]}],"references":["https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6","https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2","https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc","https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277","https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159","https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de","https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e","https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52992.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52992","state":"PUBLISHED","datePublished":"2026-06-24T16:29:05.592Z","dateUpdated":"2026-06-24T16:29:05.592Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.377Z"},"containers":{"cna":{"title":"fs/adfs: validate nzones in adfs_validate_bblk()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/adfs: validate nzones in adfs_validate_bblk()\n\nReject ADFS disc records with a zero zone count during boot block\nvalidation, before the disc record is used.\n\nWhen nzones is 0, adfs_read_map() passes it to kmalloc_array(0, ...)\nwhich returns ZERO_SIZE_PTR, and adfs_map_layout() then writes to\ndm[-1], causing an out-of-bounds write before the allocated buffer.\n\nadfs_validate_dr0() already rejects nzones != 1 for old-format\nimages.  Add the equivalent check to adfs_validate_bblk() for\nnew-format images so that a crafted image with nzones == 0 is\nrejected at probe time.\n\nFound by syzkaller."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"33aafd2418a59c96c0389d47ea09026661fa9ec6","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"1f0ed0f57f0fc87e46fe19a05435c214dc464be2","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"a11372a8b1ceaa5e950a84b3b5fbf8228f25e277","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"1586bd2d2fb436a26df20a70e78b000d34a7d159","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"60d82592ac8b5637fbed871381eb0a16df0a492e","versionType":"git"},{"version":"f6f14a0d71b0773a1d4147d1a3c33d537cd213ab","status":"affected","lessThan":"dd9d3e16c2d5fa166e13dce07413be51f42c8f5d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/adfs/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/adfs/super.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6"},{"url":"https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2"},{"url":"https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc"},{"url":"https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277"},{"url":"https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159"},{"url":"https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de"},{"url":"https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e"},{"url":"https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-24T16:29:05.592Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}