CVE-2021-44733High· 7.0▾ MidnightPoC availableA use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 38.5 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Aug 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.7%
1 GitHub repo
0.7% → 0.7%
A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
linux_kernel >= 4.12, < 4.14.261linux_kernel >= 4.15, < 4.19.224linux_kernel >= 4.20, < 5.4.170linux_kernel >= 5.5, < 5.10.89linux_kernel >= 5.11, < 5.15.12enterprise_linux = 8.0fedora = 35debian_linux = 9.0debian_linux = 10.0debian_linux = 11.0h410c_firmwareh300s_firmwareh500s_firmwareh700s_firmwareh300e_firmwareh500e_firmwareh700e_firmwareh410s_firmwareUpgrade past the affected range:
linux_kernel 5.15.12Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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