A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service.
| Vendor | Product | Versions |
|---|---|---|
| red hat | hardened_images | — |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| kernel | util-linux | cve_cpe | 95% |
| open source | open source util-linux | cert_advisory | 90% |
| red hat | openshift_container_platform | cve_cpe | 95% |
| red hat | enterprise_linux | cve_cpe | 95% |
Updated severity to CRITICAL, changed vendor and product to Red Hat and libblkid, and added new description and CVE ID.
Initial creation
