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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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().
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.28% probability · 20th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/a6968f7a367f128d120447360734344d5a3d5336Patch
- https://git.kernel.org/stable/c/a9564d84ed9f6ee71017d062d0d2182154294a4bPatch
- https://git.kernel.org/stable/c/aec36b98a1bbaa84bfd8299a306e4c12314af626Patch
- https://git.kernel.org/stable/c/b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322Patch
- https://git.kernel.org/stable/c/d7c5d79e50be6e06b669141e3db1f977a0dd4e8ePatch
- https://git.kernel.org/stable/c/e3e0e067d5b34e4a68e3cc55f8eebc413f56f8edPatch
- https://git.kernel.org/stable/c/fb7a5115422fbd6a4d505e8844f1ef5529f10489Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.