CWE
369
Advisory Published
Updated

CVE-2024-46676: nfc: pn533: Add poll mod list filling check

First published: Fri Sep 13 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: Add poll mod list filling check In case of im_protocols value is 1 and tm_protocols value is 0 this combination successfully passes the check 'if (!im_protocols && !tm_protocols)' in the nfc_start_poll(). But then after pn533_poll_create_mod_list() call in pn533_start_poll() poll mod list will remain empty and dev->poll_mod_count will remain 0 which lead to division by zero. Normally no im protocol has value 1 in the mask, so this combination is not expected by driver. But these protocol values actually come from userspace via Netlink interface (NFC_CMD_START_POLL operation). So a broken or malicious program may pass a message containing a "bad" combination of protocol parameter values so that dev->poll_mod_count is not incremented inside pn533_poll_create_mod_list(), thus leading to division by zero. Call trace looks like: nfc_genl_start_poll() nfc_start_poll() ->start_poll() pn533_start_poll() Add poll mod list filling check. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel>=3.12<5.4.283
Linux Linux kernel>=5.5<5.10.225
Linux Linux kernel>=5.11<5.15.166
Linux Linux kernel>=5.16<6.1.108
Linux Linux kernel>=6.2<6.6.49
Linux Linux kernel>=6.7<6.10.8
Linux Linux kernel=6.11-rc1
Linux Linux kernel=6.11-rc2
Linux Linux kernel=6.11-rc3
Linux Linux kernel=6.11-rc4
Linux Linux kernel=6.11-rc5
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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