CVE-2024-49977: net: stmmac: Fix zero-division error when disabling tc cbs
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix zero-division error when disabling tc cbs The commit b8c43360f6e4 ("net: stmmac: No need to calculate speed divider when offload is disabled") allows the "port_transmit_rate_kbps" to be set to a value of 0, which is then passed to the "div_s64" function when tc-cbs is disabled. This leads to a zero-division error. When tc-cbs is disabled, the idleslope, sendslope, and credit values the credit values are not required to be configured. Therefore, adding a return statement after setting the txQ mode to DCB when tc-cbs is disabled would prevent a zero-division error.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.10.221<5.10.227 | |
| Linux Linux kernel | >=5.15.162<5.15.168 | |
| Linux Linux kernel | >=6.1.96<6.1.113 | |
| Linux Linux kernel | >=6.6.36<6.6.55 | |
| Linux Linux kernel | >=6.9.7<6.10 | |
| Linux Linux kernel | >=6.10<6.10.14 | |
| Linux Linux kernel | >=6.11<6.11.3 | |
| 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/03582f4752427f60817d896f1a827aff772bd31e
- https://git.kernel.org/stable/c/5d43e1ad4567d67af2b42d3ab7c14152ffed25c6
- https://git.kernel.org/stable/c/675faf5a14c14a2be0b870db30a70764df81e2df
- https://git.kernel.org/stable/c/837d9df9c0792902710149d1a5e0991520af0f93
- https://git.kernel.org/stable/c/b0da9504a528f05f97d926b4db74ff21917a33e9
- https://git.kernel.org/stable/c/e297a2bf56d12fd7f91a0c209eb6ea84361f3368
- https://git.kernel.org/stable/c/e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4c
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49977
- https://nvd.nist.gov/vuln/detail/CVE-2024-49977
- https://launchpad.net/bugs/cve/CVE-2024-49977
- https://security-tracker.debian.org/tracker/CVE-2024-49977
- https://ubuntu.com/security/CVE-2024-49977
- https://git.kernel.org/linus/675faf5a14c14a2be0b870db30a70764df81e2df
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