CVE-2022-49053

In the Linux kernel, the following vulnerability has been resolved: scsi: target: tcmu: Fix possible page UAF tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not take refcount properly and just returns page pointer. When tcmu_try_get_data_page() returns, the returned page may have been freed by tcmu_blocks_release(). We need to get_page() under cmdr_lock to avoid concurrent tcmu_blocks_release().

• linux linux kernel (< 4.14.276) • linux linux kernel (>= 4.15 < 4.19.239) • linux linux kernel (>= 4.20 < 5.4.190) • linux linux kernel (>= 5.5 < 5.10.112) • linux linux kernel (>= 5.11 < 5.15.35) • linux linux kernel (>= 5.16 < 5.17.4) • linux linux kernel 5.18