CVE-2022-50639
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50639
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50639.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-50639
- Downstream
- Published
- 2025-12-09T00:00:12.576Z
- Modified
- 2025-12-09T03:14:24.784787Z
- Summary
- io-wq: Fix memory leak in worker creation
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
io-wq: Fix memory leak in worker creation
If the CPU mask allocation for a node fails, then the memory allocated for the 'io_wqe' struct of the current node doesn't get freed on the error handling path, since it has not yet been added to the 'wqes' array.
This was spotted when fuzzing v6.1-rc1 with Syzkaller: BUG: memory leak unreferenced object 0xffff8880093d5000 (size 1024): comm "syz-executor.2", pid 7701, jiffies 4295048595 (age 13.900s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000cb463369>] _kmemcacheallocnode+0x18e/0x720 [<00000000147a3f9c>] kmallocnodetrace+0x2a/0x130 [<000000004e107011>] iowqcreate+0x7b9/0xdc0 [<00000000c38b2018>] iouringalloctaskcontext+0x31e/0x59d [<00000000867399da>] _iouringaddtctxnode.cold+0x19/0x1ba [<000000007e0e7a79>] iouringsetup.cold+0x1b80/0x1dce [<00000000b545e9f6>] _x64sysiouringsetup+0x5d/0x80 [<000000008a8a7508>] dosyscall64+0x5d/0x90 [<000000004ac08bec>] entrySYSCALL64afterhwframe+0x63/0xcd
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50639.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/996d3efeb091c503afd3ee6b5e20eabf446fd955
- https://git.kernel.org/stable/c/b6e2c54be37d5eb4f6666e6aa59cd0581c7ffc3c
- https://git.kernel.org/stable/c/ed981911a7c90a604f4a2bee908ab07e3b786aca
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50639.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-50639
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0e03496d1967abf1ebb151a24318c07d07f41f7fFixedb6e2c54be37d5eb4f6666e6aa59cd0581c7ffc3cFixeded981911a7c90a604f4a2bee908ab07e3b786acaFixed996d3efeb091c503afd3ee6b5e20eabf446fd955