- Vulnerability/
- CVE-2024-27027
CVE-2024-27027: dpll: fix dpll_xa_ref_*_del() for multiple registrations
First published: Wed May 01 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/769324eb35143462542cdb15483cdaf4877bf661
- https://git.kernel.org/stable/c/b27e32e9367dac024cd6f61f22655714f483fd67
- https://git.kernel.org/stable/c/b446631f355ece73b13c311dd712c47381a23172
- https://launchpad.net/bugs/cve/CVE-2024-27027
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27027
- https://nvd.nist.gov/vuln/detail/CVE-2024-27027
- https://security-tracker.debian.org/tracker/CVE-2024-27027
- https://ubuntu.com/security/CVE-2024-27027
- https://git.kernel.org/linus/b446631f355ece73b13c311dd712c47381a23172
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