CVE-2024-50280 (GCVE-0-2024-50280)
Vulnerability from cvelistv5
Published
2024-11-19 01:30
Modified
2026-05-23 15:54
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: dm cache: fix flushing uninitialized delayed_work on cache_ctr error An unexpected WARN_ON from flush_work() may occur when cache creation fails, caused by destroying the uninitialized delayed_work waker in the error path of cache_create(). For example, the warning appears on the superblock checksum error. Reproduce steps: dmsetup create cmeta --table "0 8192 linear /dev/sdc 0" dmsetup create cdata --table "0 65536 linear /dev/sdc 8192" dmsetup create corig --table "0 524288 linear /dev/sdc 262144" dd if=/dev/urandom of=/dev/mapper/cmeta bs=4k count=1 oflag=direct dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0" Kernel logs: (snip) WARNING: CPU: 0 PID: 84 at kernel/workqueue.c:4178 __flush_work+0x5d4/0x890 Fix by pulling out the cancel_delayed_work_sync() from the constructor's error path. This patch doesn't affect the use-after-free fix for concurrent dm_resume and dm_destroy (commit 6a459d8edbdb ("dm cache: Fix UAF in destroy()")) as cache_dtr is not changed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2b17026685a270b2beaf1cdd9857fcedd3505c7e
Version: d2a0b298ebf83ab6236f66788a3541e91ce75a70
Version: 6a3e412c2ab131c54945327a7676b006f000a209
Version: 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa
Version: 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa
Version: 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa
Version: 034cbc8d3b47a56acd89453c29632a9c117de09d
Version: 993406104d2b28fe470126a062ad37a1e21e792e
Version: 4d20032dd90664de09f2902a7ea49ae2f7771746
Version: 2f097dfac7579fd84ff98eb1d3acd41d53a485f3
Version: 6ac4f36910764cb510bafc4c3768544f86ca48ca
Version: 5.10.163   ≤
Version: 5.15.87   ≤
Version: 6.1.4   ≤
Version: 4.9.337   ≤
Version: 4.14.303   ≤
Version: 4.19.270   ≤
Version: 5.4.229   ≤
Version: 6.0.18   ≤
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm cache: fix flushing uninitialized delayed_work on cache_ctr error\n\nAn unexpected WARN_ON from flush_work() may occur when cache creation\nfails, caused by destroying the uninitialized delayed_work waker in the\nerror path of cache_create(). For example, the warning appears on the\nsuperblock checksum error.\n\nReproduce steps:\n\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 65536 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 524288 linear /dev/sdc 262144\"\ndd if=/dev/urandom of=/dev/mapper/cmeta bs=4k count=1 oflag=direct\ndmsetup create cache --table \"0 524288 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\n\nKernel logs:\n\n(snip)\nWARNING: CPU: 0 PID: 84 at kernel/workqueue.c:4178 __flush_work+0x5d4/0x890\n\nFix by pulling out the cancel_delayed_work_sync() from the constructor\u0027s\nerror path. This patch doesn\u0027t affect the use-after-free fix for\nconcurrent dm_resume and dm_destroy (commit 6a459d8edbdb (\"dm cache: Fix\nUAF in destroy()\")) as cache_dtr is not changed."
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    "cveId": "CVE-2024-50280",
    "datePublished": "2024-11-19T01:30:21.999Z",
    "dateReserved": "2024-10-21T19:36:19.983Z",
    "dateUpdated": "2026-05-23T15:54:56.616Z",
    "state": "PUBLISHED"
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