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7.8
CVSSv3

CVE-2020-15852

Published: 20/07/2020 Updated: 03/12/2022
CVSS v2 Base Score: 4.6 | Impact Score: 6.4 | Exploitability Score: 3.9
CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8
VMScore: 409
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
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Vulnerability Summary

An issue exists in the Linux kernel 5.5 up to and including 5.7.9, as used in Xen up to and including 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.

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Mailing Lists

Full Disclosure: Xen Security Advisory 329 v3 (CVE-2020-15852) - Linux ioperm bitmap context switching issues
<!--X-Body-Begin--> <!--X-User-Header--> oss-sec mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> Xen Security Advisory 329 v3 (CVE-2020-15852) - Linux ioperm bitmap context switching issues <!--X-Subject-Header-End--> <!--X ...

References

CWE-276https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2http://xenbits.xen.org/xsa/advisory-329.htmlhttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2http://www.openwall.com/lists/oss-security/2020/07/21/2https://security.netapp.com/advisory/ntap-20200810-0001/https://nvd.nist.govhttp://seclists.org/oss-sec/2020/q3/47
CVSSv3
CVSSv2
CVSSv3
VMScore
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