UBUNTU-CVE-2024-27027
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.
02 / AFFECTED SOFTWARE
Affected packages
6 explicit affected versions
29 explicit affected versions
3 explicit affected versions
1 explicit affected versions
2 explicit affected versions
21 explicit affected versions
7 explicit affected versions
26 explicit affected versions
37 explicit affected versions
7 explicit affected versions
10 explicit affected versions
10 explicit affected versions
13 explicit affected versions
13 explicit affected versions
5 explicit affected versions
37 explicit affected versions
8 explicit affected versions
4 explicit affected versions
8 explicit affected versions
23 explicit affected versions
7 explicit affected versions
10 explicit affected versions
33 explicit affected versions
16 explicit affected versions
12 explicit affected versions
6 explicit affected versions
38 explicit affected versions
51 explicit affected versions
13 explicit affected versions
10 explicit affected versions
5 explicit affected versions
10 explicit affected versions
13 explicit affected versions
6 explicit affected versions
1 explicit affected versions
10 explicit affected versions
8 explicit affected versions
21 explicit affected versions
6 explicit affected versions
13 explicit affected versions
12 explicit affected versions
7 explicit affected versions
3 explicit affected versions
12 explicit affected versions
26 explicit affected versions
23 explicit affected versions
5 explicit affected versions
3 explicit affected versions
26 explicit affected versions
12 explicit affected versions
44 explicit affected versions
6 explicit affected versions
4 explicit affected versions
4 explicit affected versions
16 explicit affected versions
9 explicit affected versions
12 explicit affected versions
4 explicit affected versions
13 explicit affected versions
5 explicit affected versions
7 explicit affected versions
7 explicit affected versions
10 explicit affected versions
14 explicit affected versions
18 explicit affected versions
3 explicit affected versions
16 explicit affected versions
1 explicit affected versions
43 explicit affected versions
11 explicit affected versions
35 explicit affected versions
12 explicit affected versions
6 explicit affected versions
12 explicit affected versions
50 explicit affected versions
12 explicit affected versions
27 explicit affected versions
12 explicit affected versions
7 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/b446631f355ece73b13c311dd712c47381a23172
- https://git.kernel.org/stable/c/769324eb35143462542cdb15483cdaf4877bf661
- https://git.kernel.org/stable/c/b27e32e9367dac024cd6f61f22655714f483fd67
- https://git.kernel.org/stable/c/b446631f355ece73b13c311dd712c47381a23172
- https://ubuntu.com/security/CVE-2024-27027
- https://ubuntu.com/security/notices/USN-6816-1
- https://ubuntu.com/security/notices/USN-6817-1
- https://ubuntu.com/security/notices/USN-6817-2
- https://ubuntu.com/security/notices/USN-6817-3
- https://ubuntu.com/security/notices/USN-6878-1
- https://www.cve.org/CVERecord?id=CVE-2024-27027