CVE-2022-49053
Last modified
CVE-2022-49053 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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().. EPSS estimates a 0.26% chance of exploitation in the next 30 days.
Description
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().
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| 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 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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