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Vulnerability · Published May 1, 2024 · Assigned by Linux

CVE-2024-27027dpll: fix dpll_xa_ref_*_del() for multiple registrations

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. 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 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 81.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: dpll: fix dpll_xa_ref_*_del() for multiple registrations Currently, if there are multiple registrations of the same pin on the same dpll device, following warnings are observed: WARNING: CPU: 5 PID: 2212 at drivers/dpll/dpll_core.c:143 dpll_xa_ref_pin_del.isra.0+0x21e/0x230 WARNING: CPU: 5 PID: 2212 at drivers/dpll/dpll_core.c:223 __dpll_pin_unregister+0x2b3/0x2c0 The problem is, that in both dpll_xa_ref_dpll_del() and dpll_xa_ref_pin_del() registration is only removed from list in case the reference count drops to zero. That is wrong, the registration has to be removed always. To fix this, remove the registration from the list and free it unconditionally, instead of doing it only when the ref reference counter reaches zero.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.7.12-1DEBIAN-CVE-2024-27027
Debian:14linux6.7.12-1DEBIAN-CVE-2024-27027
Ubuntu:24.04:LTSlinux6.8.0-35.35UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-aws6.8.0-1009.9UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-azure6.8.0-1008.8UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-gcp6.8.0-1008.9UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-gke6.8.0-1004.7UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-ibm6.8.0-1006.6UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-35.35.1UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1006.6UBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-oracle6.8.0-1006.6UBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-raspi6.8.0-1005.5UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-27027
Ubuntu:24.04:LTSlinux-riscv6.8.0-35.35.1UBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-27027
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-27027

Affected products (as reported)

VendorProductVersions
Linux Linux 9431063ad323ac864750aeba4d304389bc42ca4e – before 769324eb35143462542cdb15483cdaf4877bf6619431063ad323ac864750aeba4d304389bc42ca4e – before b27e32e9367dac024cd6f61f22655714f483fd679431063ad323ac864750aeba4d304389bc42ca4e – before b446631f355ece73b13c311dd712c47381a23172
Linux Linux 6.7

References