AZL-49582
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-49582.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-49582
- Upstream
- Published
- 2024-09-13T06:15:12Z
- Modified
- 2026-04-01T05:17:24.720287Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2024-46676 affecting package kernel for versions less than 5.15.167.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
nfc: pn533: Add poll mod list filling check
In case of improtocols value is 1 and tmprotocols value is 0 this combination successfully passes the check 'if (!improtocols && !tmprotocols)' in the nfcstartpoll(). But then after pn533pollcreatemodlist() call in pn533startpoll() poll mod list will remain empty and dev->pollmodcount 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 (NFCCMDSTARTPOLL operation). So a broken or malicious program may pass a message containing a "bad" combination of protocol parameter values so that dev->pollmodcount is not incremented inside pn533pollcreatemodlist(), thus leading to division by zero. Call trace looks like: nfcgenlstartpoll() nfcstartpoll() ->startpoll() pn533start_poll()
Add poll mod list filling check.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
- References