CVE-2024-50145: octeon_ep: Add SKB allocation failures handling in __octep_oq_process_rx()
First published: Thu Nov 07 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: octeon_ep: Add SKB allocation failures handling in __octep_oq_process_rx() build_skb() returns NULL in case of a memory allocation failure so handle it inside __octep_oq_process_rx() to avoid NULL pointer dereference. __octep_oq_process_rx() is called during NAPI polling by the driver. If skb allocation fails, keep on pulling packets out of the Rx DMA queue: we shouldn't break the polling immediately and thus falsely indicate to the octep_napi_poll() that the Rx pressure is going down. As there is no associated skb in this case, don't process the packets and don't push them up the network stack - they are skipped. Helper function is implemented to unmmap/flush all the fragment buffers used by the dropped packet. 'alloc_failures' counter is incremented to mark the skb allocation error in driver statistics. Found by Linux Verification Center (linuxtesting.org) with SVACE.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.19<6.1.115 | |
| Linux Kernel | >=6.2<6.6.59 | |
| Linux Kernel | >=6.7<6.11.6 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| Linux Kernel | =6.12-rc4 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/09ce491112bbf0b866e2638d3e961c1c73d1f00b
- https://git.kernel.org/stable/c/c2d2dc4f88bb3cfc4f3cc320fd3ff51b0ae5b0ea
- https://git.kernel.org/stable/c/2dedcb6f99f4c1a11944e7cc35dbeb9b18a5cbac
- https://git.kernel.org/stable/c/eb592008f79be52ccef88cd9a5249b3fc0367278
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50145
- https://nvd.nist.gov/vuln/detail/CVE-2024-50145
- https://launchpad.net/bugs/cve/CVE-2024-50145
- https://security-tracker.debian.org/tracker/CVE-2024-50145
- https://ubuntu.com/security/CVE-2024-50145
- https://git.kernel.org/linus/eb592008f79be52ccef88cd9a5249b3fc0367278
Frequently Asked Questions
What is the severity of CVE-2024-50145?
CVE-2024-50145 is categorized as a moderate severity vulnerability due to potential NULL pointer dereference issues.
How do I fix CVE-2024-50145?
To resolve CVE-2024-50145, it is recommended to update to a patched version of the Linux kernel that addresses the SKB allocation handling.
Which Linux kernel versions are affected by CVE-2024-50145?
CVE-2024-50145 affects Linux kernel versions between 5.19 and 6.1.115, as well as several others up to and including 6.12-rc4.
What are the risks of not patching CVE-2024-50145?
Not patching CVE-2024-50145 may lead to application crashes or denial of service due to NULL pointer dereference vulnerabilities.
Is there a workaround for CVE-2024-50145 until I can patch?
While a specific workaround for CVE-2024-50145 is not detailed, minimizing exposure to impacted kernel versions may reduce risk.
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