cve-2021-47081
Vulnerability from cvelistv5
Published
2024-03-01 21:15
Modified
2024-11-04 11:59
Severity ?
Summary
habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/115726c5d312b462c9d9931ea42becdfa838a076
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhabanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory\n\nOur code analyzer reported a uaf.\n\nIn gaudi_memset_device_memory, cb is get via hl_cb_kernel_create()\nwith 2 refcount.\nIf hl_cs_allocate_job() failed, the execution runs into release_cb\nbranch. One ref of cb is dropped by hl_cb_put(cb) and could be freed\nif other thread also drops one ref. Then cb is used by cb-\u003eid later,\nwhich is a potential uaf.\n\nMy patch add a variable \u0027id\u0027 to accept the value of cb-\u003eid before the\nhl_cb_put(cb) is called, to avoid the potential uaf."
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