| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49586: tcp: Fix data-races around sysctl_tcp_fastopen. |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tcp: Fix data-races around sysctl_tcp_fastopen. |
| |
| While reading sysctl_tcp_fastopen, it can be changed concurrently. |
| Thus, we need to add READ_ONCE() to its readers. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49586 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.6 with commit 2100c8d2d9db23c0a09901a782bb4e3b21bee298 and fixed in 4.19.254 with commit 03da610696a32578fc4f986479341ce9d430df08 |
| Issue introduced in 3.6 with commit 2100c8d2d9db23c0a09901a782bb4e3b21bee298 and fixed in 5.4.208 with commit 25d53d858a6c0b89a6e69e376c2a57c4f4c2c8cc |
| Issue introduced in 3.6 with commit 2100c8d2d9db23c0a09901a782bb4e3b21bee298 and fixed in 5.10.134 with commit 22938534c611136f35e2ca545bb668073ca5ef49 |
| Issue introduced in 3.6 with commit 2100c8d2d9db23c0a09901a782bb4e3b21bee298 and fixed in 5.15.58 with commit 539d9ab79eba3974b479cad61a8688c41fe62e12 |
| Issue introduced in 3.6 with commit 2100c8d2d9db23c0a09901a782bb4e3b21bee298 and fixed in 5.18.15 with commit 448ab998947996a0a451f8229f19087964cf2670 |
| Issue introduced in 3.6 with commit 2100c8d2d9db23c0a09901a782bb4e3b21bee298 and fixed in 5.19 with commit 5a54213318c43f4009ae158347aa6016e3b9b55a |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-49586 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/ipv4/af_inet.c |
| net/ipv4/tcp.c |
| net/ipv4/tcp_fastopen.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/03da610696a32578fc4f986479341ce9d430df08 |
| https://git.kernel.org/stable/c/25d53d858a6c0b89a6e69e376c2a57c4f4c2c8cc |
| https://git.kernel.org/stable/c/22938534c611136f35e2ca545bb668073ca5ef49 |
| https://git.kernel.org/stable/c/539d9ab79eba3974b479cad61a8688c41fe62e12 |
| https://git.kernel.org/stable/c/448ab998947996a0a451f8229f19087964cf2670 |
| https://git.kernel.org/stable/c/5a54213318c43f4009ae158347aa6016e3b9b55a |
