Vulnerability · Published Jul 20, 2020 · Assigned by mitre
CVE-2020-15852
High 7.8
In plain English
A high-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.3%top 72.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.7.10-1 | DEBIAN-CVE-2020-15852 |
| Debian:13 | linux | 5.7.10-1 | DEBIAN-CVE-2020-15852 |
| Debian:14 | linux | 5.7.10-1 | DEBIAN-CVE-2020-15852 |
Affected products (as reported)
References
- http://xenbits.xen.org/xsa/advisory-329.html x_refsource_MISC
- https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2 x_refsource_MISC
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2 x_refsource_MISC
- [oss-security] 20200721 Xen Security Advisory 329 v3 (CVE-2020-15852) - Linux ioperm bitmap context switching issues mailing-list, x_refsource_MLIST
- https://security.netapp.com/advisory/ntap-20200810-0001/ x_refsource_CONFIRM