CVE-2023-52877
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Fix NULL pointer dereference in tcpm_pd_svdm() It is possible that typec_register_partner() returns ERR_PTR on failure.
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Fix NULL pointer dereference in tcpm_pd_svdm() It is possible that typec_register_partner() returns ERR_PTR on failure. When port->partner is an error, a NULL pointer dereference may occur as shown below. [91222.095236][ T319] typec port0: failed to register partner (-17) ... [91225.061491][ T319] Unable to handle kernel NULL pointer dereference at virtual address 000000000000039f [91225.274642][ T319] pc : tcpm_pd_data_request+0x310/0x13fc [91225.274646][ T319] lr : tcpm_pd_data_request+0x298/0x13fc [91225.308067][ T319] Call trace: [91225.308070][ T319] tcpm_pd_data_request+0x310/0x13fc [91225.308073][ T319] tcpm_pd_rx_handler+0x100/0x9e8 [91225.355900][ T319] kthread_worker_fn+0x178/0x58c [91225.355902][ T319] kthread+0x150/0x200 [91225.355905][ T319] ret_from_fork+0x10/0x30 Add a check for port->partner to avoid dereferencing a NULL pointer.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/4987daf86c152ff882d51572d154ad12e4ff3a4bPatch
- https://git.kernel.org/stable/c/9ee038590d808a95d16adf92818dcd4752273c08Patch
- https://git.kernel.org/stable/c/b37a168c0137156042a0ca9626651b5a789e822bPatch
- https://git.kernel.org/stable/c/e5f53a68a596e04df3fde3099273435a30b6fdacPatch
- https://git.kernel.org/stable/c/e7a802447c491903aa7cb45967aa2a934a4e63fcPatch
- https://git.kernel.org/stable/c/4987daf86c152ff882d51572d154ad12e4ff3a4bPatch
- https://git.kernel.org/stable/c/9ee038590d808a95d16adf92818dcd4752273c08Patch
- https://git.kernel.org/stable/c/b37a168c0137156042a0ca9626651b5a789e822bPatch
- https://git.kernel.org/stable/c/e5f53a68a596e04df3fde3099273435a30b6fdacPatch
- https://git.kernel.org/stable/c/e7a802447c491903aa7cb45967aa2a934a4e63fcPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.