CVE-2022-49601: tcp/dccp: Fix a data-race around sysctl_tcp_fwmark_accept.
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: tcp/dccp: Fix a data-race around sysctl_tcp_fwmark_accept. While reading sysctl_tcp_fwmark_accept, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.16<4.9.325 | |
| Linux Kernel | >=4.10<4.14.290 | |
| Linux Kernel | >=4.15<4.19.254 | |
| Linux Kernel | >=4.20<5.4.208 | |
| Linux Kernel | >=5.5<5.10.134 | |
| Linux Kernel | >=5.11<5.15.58 | |
| Linux Kernel | >=5.16<5.18.15 | |
| Linux Kernel | =5.19-rc1 | |
| Linux Kernel | =5.19-rc2 | |
| Linux Kernel | =5.19-rc3 | |
| Linux Kernel | =5.19-rc4 | |
| Linux Kernel | =5.19-rc5 | |
| Linux Kernel | =5.19-rc6 | |
| Linux Kernel | =5.19-rc7 |
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Reference Links
- https://git.kernel.org/stable/c/13207f9485b5de68decf296ceb0046f5eabb2485
- https://git.kernel.org/stable/c/45fc82706a97242539d6b841ddd7a077ec20757b
- https://git.kernel.org/stable/c/abf70de2ec026ae8d7da4e79bec61888a880e00b
- https://git.kernel.org/stable/c/a7386602a2fe2f6192477e8ede291a815da09d81
- https://git.kernel.org/stable/c/d4f65615db7fca3df9f7e79eadf937e6ddb03c54
- https://git.kernel.org/stable/c/bf3134feffe61b7a0e21f60a04743f8da0958b53
- https://git.kernel.org/stable/c/526d8cf8824f613c72dba2155542295e70135f62
- https://git.kernel.org/stable/c/1a0008f9df59451d0a17806c1ee1a19857032fa8
Frequently Asked Questions
What is the severity of CVE-2022-49601?
CVE-2022-49601 has a medium severity rating due to its potential impact on system stability.
How do I fix CVE-2022-49601?
To resolve CVE-2022-49601, update your Linux kernel to a version that includes the patch for this vulnerability.
What versions of the Linux kernel are affected by CVE-2022-49601?
CVE-2022-49601 affects various versions of the Linux kernel between 3.16 and 5.19-rc7.
What type of vulnerability is CVE-2022-49601?
CVE-2022-49601 is a data-race condition vulnerability affecting the tcp/dccp functionality.
Can CVE-2022-49601 be exploited remotely?
CVE-2022-49601 does not appear to have remote exploitation capabilities as it involves concurrent access to sysctl parameters.
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