PT-2025-49620 · Linux+1 · Linux Kernel+1

Published 2025-12-09 · Updated 2026-02-24 · CVE-2022-50640

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel's mmc core component related to handling non-standard SDIO cards. Specifically, the issue arises from an incorrect reference counter management when a non-standard SDIO card is removed. The SDIO tuple is allocated only for standard SDIO cards, leading to memory corruption and potentially a kernel panic when a non-standard card is removed because the card device's reference counter is not properly incremented during initialization but is decremented during release.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Related Identifiers

CVE-2022-50640

RHSA-2024:9315

SUSE-SU-2026:0263-1

SUSE-SU-2026:0316-1

SUSE-SU-2026:0317-1

SUSE-SU-2026:0350-1

SUSE-SU-2026:0369-1

SUSE-SU-2026:0411-1

SUSE-SU-2026:0617-1

Affected Products

Linux Kernel

Red Hat

References · 1116

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50640.json · Exploit
• https://ubuntu.com/security/CVE-2022-50640 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-50640 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-50640 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0317-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0369-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0316-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-50640 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-50640 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:0350-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50640 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50640 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0617-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0411-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0263-1 · Vendor Advisory