| 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-2022-49630: tcp: Fix a data-race around sysctl_tcp_ecn_fallback. |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tcp: Fix a data-race around sysctl_tcp_ecn_fallback. |
| |
| While reading sysctl_tcp_ecn_fallback, it can be changed concurrently. |
| Thus, we need to add READ_ONCE() to its reader. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49630 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.2 with commit 492135557dc090a1abb2cfbe1a412757e3ed68ab and fixed in 5.15.56 with commit 8bcf7339f2cf70ea4461df6ea045d1aadfabfa11 |
| Issue introduced in 4.2 with commit 492135557dc090a1abb2cfbe1a412757e3ed68ab and fixed in 5.18.13 with commit 1ec3d6c2626ee6e1b36b7bd006873a271406ba61 |
| Issue introduced in 4.2 with commit 492135557dc090a1abb2cfbe1a412757e3ed68ab and fixed in 5.19 with commit 12b8d9ca7e678abc48195294494f1815b555d658 |
| |
| 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-2022-49630 |
| 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/sysctl_net_ipv4.c |
| 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/8bcf7339f2cf70ea4461df6ea045d1aadfabfa11 |
| https://git.kernel.org/stable/c/1ec3d6c2626ee6e1b36b7bd006873a271406ba61 |
| https://git.kernel.org/stable/c/12b8d9ca7e678abc48195294494f1815b555d658 |
