CVEvulnerability
CVE-2020-15852
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-07-20
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-276
Description
An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.
Affected configurations
• linux linux kernel (>= 5.5 <= 5.7.9)
• xen xen (<= 4.13.1)
• netapp cloud backup
• netapp steelstore cloud integrated storage
• netapp solidfire baseboard management controller
Related
Weakness · CWE (1)
- CWE-276 Incorrect Default Permissions weakness
References
- http://www.openwall.com/lists/oss-security/2020/07/21/2 Mailing List, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-329.html Patch, Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2 Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2 Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200810-0001/ Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/21/2 Mailing List, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-329.html Patch, Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2 Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2 Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200810-0001/ Third Party Advisory