CVE-2021-47081 (GCVE-0-2021-47081)

Vulnerability from cvelistv5 – Published: 2024-03-01 21:15 – Updated: 2025-05-04 07:03
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory Our code analyzer reported a uaf. In gaudi_memset_device_memory, cb is get via hl_cb_kernel_create() with 2 refcount. If hl_cs_allocate_job() failed, the execution runs into release_cb branch. One ref of cb is dropped by hl_cb_put(cb) and could be freed if other thread also drops one ref. Then cb is used by cb->id later, which is a potential uaf. My patch add a variable 'id' to accept the value of cb->id before the hl_cb_put(cb) is called, to avoid the potential uaf.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 423815bf02e257091d5337be5c63b57fc29e4254 , < b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7 (git)
Affected: 423815bf02e257091d5337be5c63b57fc29e4254 , < 115726c5d312b462c9d9931ea42becdfa838a076 (git)
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    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.12.7 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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