{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-23T08:26:07.301","vulnerabilities":[{"cve":{"id":"CVE-2022-50534","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-10-07T16:15:37.530","lastModified":"2026-03-17T17:16:24.127","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm thin: Use last transaction's pmd->root when commit failed\n\nRecently we found a softlock up problem in dm thin pool btree lookup\ncode due to corrupted metadata:\n\n Kernel panic - not syncing: softlockup: hung tasks\n CPU: 7 PID: 2669225 Comm: kworker/u16:3\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n Workqueue: dm-thin do_worker [dm_thin_pool]\n Call Trace:\n   <IRQ>\n   dump_stack+0x9c/0xd3\n   panic+0x35d/0x6b9\n   watchdog_timer_fn.cold+0x16/0x25\n   __run_hrtimer+0xa2/0x2d0\n   </IRQ>\n   RIP: 0010:__relink_lru+0x102/0x220 [dm_bufio]\n   __bufio_new+0x11f/0x4f0 [dm_bufio]\n   new_read+0xa3/0x1e0 [dm_bufio]\n   dm_bm_read_lock+0x33/0xd0 [dm_persistent_data]\n   ro_step+0x63/0x100 [dm_persistent_data]\n   btree_lookup_raw.constprop.0+0x44/0x220 [dm_persistent_data]\n   dm_btree_lookup+0x16f/0x210 [dm_persistent_data]\n   dm_thin_find_block+0x12c/0x210 [dm_thin_pool]\n   __process_bio_read_only+0xc5/0x400 [dm_thin_pool]\n   process_thin_deferred_bios+0x1a4/0x4a0 [dm_thin_pool]\n   process_one_work+0x3c5/0x730\n\nFollowing process may generate a broken btree mixed with fresh and\nstale btree nodes, which could get dm thin trapped in an infinite loop\nwhile looking up data block:\n Transaction 1: pmd->root = A, A->B->C   // One path in btree\n                pmd->root = X, X->Y->Z   // Copy-up\n Transaction 2: X,Z is updated on disk, Y write failed.\n                // Commit failed, dm thin becomes read-only.\n                process_bio_read_only\n\t\t dm_thin_find_block\n\t\t  __find_block\n\t\t   dm_btree_lookup(pmd->root)\nThe pmd->root points to a broken btree, Y may contain stale node\npointing to any block, for example X, which gets dm thin trapped into\na dead loop while looking up Z.\n\nFix this by setting pmd->root in __open_metadata(), so that dm thin\nwill use the last transaction's pmd->root if commit failed.\n\nFetch a reproducer in [Link].\n\nLinke: https://bugzilla.kernel.org/show_bug.cgi?id=216790"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"4.9.337","matchCriteriaId":"2D92C48B-2EE3-4BDF-980E-3250EF5B579F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"4.14.303","matchCriteriaId":"1E7450AD-4739-46F0-B81B-C02E7B35A97B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"4.19.270","matchCriteriaId":"AE8904A3-99BE-4E49-9682-1F90A6373F4F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.229","matchCriteriaId":"A0C0D95E-414A-445E-941B-3EF6A4D3A093"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.163","matchCriteriaId":"D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.87","matchCriteriaId":"7B9E5B1C-CD46-4790-9500-615863850401"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.0.18","matchCriteriaId":"08D38C5F-9644-4549-BBA6-F0860F024D14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.4","matchCriteriaId":"BC4189D9-5478-4E88-A78D-9C1DE29B217C"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3db757ffdd87ed8d7118b2250236a496502a660f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/4b710e8481ade7c9200e94d3018e99dc42a0a0e8","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/7991dbff6849f67e823b7cc0c15e5a90b0549b9f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/87d69b8824ca9b090f5a8ed47f758e8f6eecb871","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/94f01ecc2aa0be992865acc80ebb6701f731f955","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/a63ce4eca86fd207e3db07c00fb7ccf4adf1b230","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b35a22760aa5008d82533e59b0f0b5eb1b02d4e5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b91f481300e3a10eaf66b94fc39b740928762aaf","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f758987ff0af3a4b5ee69e95cab6a5294e4367b0","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}