Vulnerability · Published May 26, 2021 · Assigned by redhat
CVE-2020-25670
High 7.8
In plain English
A high-severity use-after-free in Linux Kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.6%top 51.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A vulnerability was found in Linux Kernel where refcount leak in llcp_sock_bind() causing use-after-free which might lead to privilege escalations.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.10.38-1 | DEBIAN-CVE-2020-25670 |
| Debian:13 | linux | 5.10.38-1 | DEBIAN-CVE-2020-25670 |
| Debian:14 | linux | 5.10.38-1 | DEBIAN-CVE-2020-25670 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-25670 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-25670 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-25670 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Linux Kernel | All |
Weakness: CWE-416
References
- [oss-security] 20201101 [CVE-2020-25670,CVE-2020-25671,CVE-2020-25672,CVE-2020-25673]Linux kernel: many bugs in nfc socket mailing-list, x_refsource_MLIST
- FEDORA-2021-1c170a7c7c vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-21360476b6 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-d56567bdab vendor-advisory, x_refsource_FEDORA
- [oss-security] 20210511 CVE-2021-23134: Linux kernel: UAF in nfc sockets mailing-list, x_refsource_MLIST
- https://www.openwall.com/lists/oss-security/2020/11/01/1 x_refsource_MISC
- [debian-lts-announce] 20210623 [SECURITY] [DLA 2689-1] linux security update mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20210623 [SECURITY] [DLA 2690-1] linux-4.19 security update mailing-list, x_refsource_MLIST
- https://security.netapp.com/advisory/ntap-20210702-0008/ x_refsource_CONFIRM