CVE-2020-27675
Summary
| CVE | CVE-2020-27675 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-10-22 21:15:00 UTC |
| Updated | 2023-11-07 03:20:00 UTC |
| Description | An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5. |
Risk And Classification
Problem Types: CWE-362 | CWE-476 | CWE-416
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Debian | Debian Linux | 9.0 | All | All | All |
| Operating System | Fedoraproject | Fedora | 31 | All | All | All |
| Operating System | Fedoraproject | Fedora | 32 | All | All | All |
| Operating System | Fedoraproject | Fedora | 33 | All | All | All |
| Operating System | Fedoraproject | Fedora | 31 | All | All | All |
| Operating System | Fedoraproject | Fedora | 32 | All | All | All |
| Operating System | Fedoraproject | Fedora | 33 | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| kernel/git/torvalds/linux.git - Linux kernel source tree | MISC | git.kernel.org | Patch, Vendor Advisory |
| [SECURITY] Fedora 32 Update: kernel-5.8.17-200.fc32 - package-announce - Fedora Mailing-Lists | lists.fedoraproject.org | ||
| Xen: Multiple vulnerabilities (GLSA 202011-06) — Gentoo security | GENTOO | security.gentoo.org | |
| [SECURITY] [DLA 2494-1] linux security update | MLIST | lists.debian.org | |
| [SECURITY] Fedora 33 Update: kernel-5.8.17-300.fc33 - package-announce - Fedora Mailing-Lists | lists.fedoraproject.org | ||
| XSA-331 - Xen Security Advisories | MISC | xenbits.xen.org | Patch, Vendor Advisory |
| [SECURITY] Fedora 31 Update: kernel-5.8.17-100.fc31 - package-announce - Fedora Mailing-Lists | FEDORA | lists.fedoraproject.org | Third Party Advisory |
| oss-security - Xen Security Advisory 331 v3 (CVE-2020-27675) - Race condition in Linux event handler may crash dom0 | MLIST | www.openwall.com | |
| [SECURITY] Fedora 32 Update: kernel-5.8.17-200.fc32 - package-announce - Fedora Mailing-Lists | FEDORA | lists.fedoraproject.org | Third Party Advisory |
| xen/events: avoid removing an event channel while handling it · torvalds/linux@073d055 · GitHub | MISC | github.com | Patch, Third Party Advisory |
| [SECURITY] Fedora 31 Update: kernel-5.8.17-100.fc31 - package-announce - Fedora Mailing-Lists | lists.fedoraproject.org | ||
| [SECURITY] Fedora 33 Update: kernel-5.8.17-300.fc33 - package-announce - Fedora Mailing-Lists | FEDORA | lists.fedoraproject.org | Third Party Advisory |
| [SECURITY] [DLA 2483-1] linux-4.19 security update | MLIST | lists.debian.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 353100 Amazon Linux Security Advisory for kernel : ALAC2012-2021-024
- 353101 Amazon Linux Security Advisory for kmod-mlx5 : ALAC2012-2021-025
- 353102 Amazon Linux Security Advisory for kmod-sfc : ALAC2012-2021-026
- 353133 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-018
- 378881 Citrix XenServer Security Updates (CTX284874)
- 6140199 AWS Bottlerocket Security Update for kernel (GHSA-46c3-2ccr-wcc8)
- 900040 CBL-Mariner Linux Security Update for kernel 5.4.91
- 903428 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (3494)
- 905738 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (3494-1)