{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53231", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T14:19:21.847Z", "datePublished": "2025-09-15T14:22:03.599Z", "dateUpdated": "2026-05-11T19:40:46.848Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:40:46.848Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: Fix detection of atomic context\n\nCurrent check for atomic context is not sufficient as\nz_erofs_decompressqueue_endio can be called under rcu lock\nfrom blk_mq_flush_plug_list(). See the stacktrace [1]\n\nIn such case we should hand off the decompression work for async\nprocessing rather than trying to do sync decompression in current\ncontext. Patch fixes the detection by checking for\nrcu_read_lock_any_held() and while at it use more appropriate\n!in_task() check than in_atomic().\n\nBackground: Historically erofs would always schedule a kworker for\ndecompression which would incur the scheduling cost regardless of\nthe context. But z_erofs_decompressqueue_endio() may not always\nbe in atomic context and we could actually benefit from doing the\ndecompression in z_erofs_decompressqueue_endio() if we are in\nthread context, for example when running with dm-verity.\nThis optimization was later added in patch [2] which has shown\nimprovement in performance benchmarks.\n\n==============================================\n[1] Problem stacktrace\n[name:core&]BUG: sleeping function called from invalid context at kernel/locking/mutex.c:291\n[name:core&]in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 1615, name: CpuMonitorServi\n[name:core&]preempt_count: 0, expected: 0\n[name:core&]RCU nest depth: 1, expected: 0\nCPU: 7 PID: 1615 Comm: CpuMonitorServi Tainted: G S W OE 6.1.25-android14-5-maybe-dirty-mainline #1\nHardware name: MT6897 (DT)\nCall trace:\n dump_backtrace+0x108/0x15c\n show_stack+0x20/0x30\n dump_stack_lvl+0x6c/0x8c\n dump_stack+0x20/0x48\n __might_resched+0x1fc/0x308\n __might_sleep+0x50/0x88\n mutex_lock+0x2c/0x110\n z_erofs_decompress_queue+0x11c/0xc10\n z_erofs_decompress_kickoff+0x110/0x1a4\n z_erofs_decompressqueue_endio+0x154/0x180\n bio_endio+0x1b0/0x1d8\n __dm_io_complete+0x22c/0x280\n clone_endio+0xe4/0x280\n bio_endio+0x1b0/0x1d8\n blk_update_request+0x138/0x3a4\n blk_mq_plug_issue_direct+0xd4/0x19c\n blk_mq_flush_plug_list+0x2b0/0x354\n __blk_flush_plug+0x110/0x160\n blk_finish_plug+0x30/0x4c\n read_pages+0x2fc/0x370\n page_cache_ra_unbounded+0xa4/0x23c\n page_cache_ra_order+0x290/0x320\n do_sync_mmap_readahead+0x108/0x2c0\n filemap_fault+0x19c/0x52c\n __do_fault+0xc4/0x114\n handle_mm_fault+0x5b4/0x1168\n do_page_fault+0x338/0x4b4\n do_translation_fault+0x40/0x60\n do_mem_abort+0x60/0xc8\n el0_da+0x4c/0xe0\n el0t_64_sync_handler+0xd4/0xfc\n el0t_64_sync+0x1a0/0x1a4\n\n[2] Link: https://lore.kernel.org/all/20210317035448.13921-1-huangjianan@oppo.com/" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/erofs/zdata.c" ], "versions": [ { "version": "aea1286dcbbb87cf33595c2ac8b153c29a4611cb", "lessThan": "597fb60c75132719687e173b75cab8f6eb1ca657", "status": "affected", "versionType": "git" }, { "version": "aea1286dcbbb87cf33595c2ac8b153c29a4611cb", "lessThan": "12d0a24afd9ea58e581ea64d64e066f2027b28d9", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/erofs/zdata.c" ], "versions": [ { "version": "4.19", "status": "affected" }, { "version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.7", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.4.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.5" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/597fb60c75132719687e173b75cab8f6eb1ca657" }, { "url": "https://git.kernel.org/stable/c/12d0a24afd9ea58e581ea64d64e066f2027b28d9" } ], "title": "erofs: Fix detection of atomic context", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53231", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T17:55:25.324929Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:02:49.372Z" } } ] } }