VulnerabilityModified
CVE-2020-15852
An attacker may be granted the I/O port permissions of an unrelated task.
HIGH 7.8EPSS 0.33%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.33%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- 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
- 0.33% probability · 25th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-276
- Affected
- linux/linux kernel · xen/xen · netapp/cloud backup · netapp/steelstore cloud integrated storage · netapp/solidfire baseboard management controller
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2020/07/21/2Mailing List, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-329.htmlPatch, Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200810-0001/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/21/2Mailing List, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-329.htmlPatch, Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200810-0001/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.