{"id":"CVE-2026-53272","state":"PUBLISHED","title":"erofs: fix use-after-free on sbi->sync_decompress","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix use-after-free on sbi->sync_decompress\n\nz_erofs_decompress_kickoff() can race with filesystem unmount, causing\na use-after-free on sbi->sync_decompress.\n\nWhen I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()\nto queue z_erofs_decompressqueue_work() asynchronously. Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi->sync_decompress.\n\nThread (unmount)        I/O completion        kworker\n                        queue_work\n                                              z_erofs_decompressqueue_work\n                                               (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n  erofs_sb_free\n   kfree(sbi)\n                        access sbi->sync_decompress  // UAF!!","publishedAt":"2026-06-25T08:39:57.147Z","updatedAt":"2026-10-30T12:26:53.648Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"5627e57f1da68ff0146896eb3d2eed25e62adc44","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"59db5d8bcc65e04d8598afd81ec3a18edb407470","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"86ab00cf81d44b675bb23db62b88fd76c8ac8cea","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"00bf6868df65fa95b3854996246d15759fdc7070","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"95caf60da33d87ed26c28993620f0d92487b0296","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"1aee05e814d292064bf5fa15733741040cdc48ba","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/zdata.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","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/erofs/zdata.c"]}],"references":["https://git.kernel.org/stable/c/5627e57f1da68ff0146896eb3d2eed25e62adc44","https://git.kernel.org/stable/c/59db5d8bcc65e04d8598afd81ec3a18edb407470","https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea","https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070","https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296","https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba"],"weaknesses":[],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53272.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53272","state":"PUBLISHED","datePublished":"2026-06-25T08:39:57.147Z","dateUpdated":"2026-10-30T12:26:53.648Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.395Z"},"containers":{"cna":{"title":"erofs: fix use-after-free on sbi->sync_decompress","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix use-after-free on sbi->sync_decompress\n\nz_erofs_decompress_kickoff() can race with filesystem unmount, causing\na use-after-free on sbi->sync_decompress.\n\nWhen I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()\nto queue z_erofs_decompressqueue_work() asynchronously. Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi->sync_decompress.\n\nThread (unmount)        I/O completion        kworker\n                        queue_work\n                                              z_erofs_decompressqueue_work\n                                               (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n  erofs_sb_free\n   kfree(sbi)\n                        access sbi->sync_decompress  // UAF!!"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"5627e57f1da68ff0146896eb3d2eed25e62adc44","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"59db5d8bcc65e04d8598afd81ec3a18edb407470","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"86ab00cf81d44b675bb23db62b88fd76c8ac8cea","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"00bf6868df65fa95b3854996246d15759fdc7070","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"95caf60da33d87ed26c28993620f0d92487b0296","versionType":"git"},{"version":"40452ffca3c1a0f2994e826f9fa213b107f1a2d4","status":"affected","lessThan":"1aee05e814d292064bf5fa15733741040cdc48ba","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/zdata.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","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/erofs/zdata.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5627e57f1da68ff0146896eb3d2eed25e62adc44"},{"url":"https://git.kernel.org/stable/c/59db5d8bcc65e04d8598afd81ec3a18edb407470"},{"url":"https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea"},{"url":"https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070"},{"url":"https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296"},{"url":"https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:53.648Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}