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Message-ID: <2025022606-CVE-2022-49572-51d7@gregkh> Date: Wed, 26 Feb 2025 03:22:15 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2022-49572: tcp: Fix data-races around sysctl_tcp_slow_start_after_idle. Description =========== In the Linux kernel, the following vulnerability has been resolved: tcp: Fix data-races around sysctl_tcp_slow_start_after_idle. While reading sysctl_tcp_slow_start_after_idle, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers. The Linux kernel CVE team has assigned CVE-2022-49572 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.18 with commit 35089bb203f44e33b6bbb6c4de0b0708f9a48921 and fixed in 4.19.254 with commit 3b26e11b07a09b31247688bec61e2925d4a571b6 Issue introduced in 2.6.18 with commit 35089bb203f44e33b6bbb6c4de0b0708f9a48921 and fixed in 5.4.208 with commit 369d99c2b89f54473adcf9acdf40ea562b5a6e0e Issue introduced in 2.6.18 with commit 35089bb203f44e33b6bbb6c4de0b0708f9a48921 and fixed in 5.10.134 with commit 0e3f82a03ec8c3808e87283e12946227415706c9 Issue introduced in 2.6.18 with commit 35089bb203f44e33b6bbb6c4de0b0708f9a48921 and fixed in 5.15.58 with commit 41aeba4506f6b70ec7500c6fe202731a4ba29fe5 Issue introduced in 2.6.18 with commit 35089bb203f44e33b6bbb6c4de0b0708f9a48921 and fixed in 5.18.15 with commit 68b6f9506747d507c7bfa374d178929b4157e8c6 Issue introduced in 2.6.18 with commit 35089bb203f44e33b6bbb6c4de0b0708f9a48921 and fixed in 5.19 with commit 4845b5713ab18a1bb6e31d1fbb4d600240b8b691 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-2022-49572 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: include/net/tcp.h net/ipv4/tcp_output.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/3b26e11b07a09b31247688bec61e2925d4a571b6 https://git.kernel.org/stable/c/369d99c2b89f54473adcf9acdf40ea562b5a6e0e https://git.kernel.org/stable/c/0e3f82a03ec8c3808e87283e12946227415706c9 https://git.kernel.org/stable/c/41aeba4506f6b70ec7500c6fe202731a4ba29fe5 https://git.kernel.org/stable/c/68b6f9506747d507c7bfa374d178929b4157e8c6 https://git.kernel.org/stable/c/4845b5713ab18a1bb6e31d1fbb4d600240b8b691
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