| 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-2024-36883: net: fix out-of-bounds access in ops_init |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: fix out-of-bounds access in ops_init |
| |
| net_alloc_generic is called by net_alloc, which is called without any |
| locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It |
| is read twice, first to allocate an array, then to set s.len, which is |
| later used to limit the bounds of the array access. |
| |
| It is possible that the array is allocated and another thread is |
| registering a new pernet ops, increments max_gen_ptrs, which is then used |
| to set s.len with a larger than allocated length for the variable array. |
| |
| Fix it by reading max_gen_ptrs only once in net_alloc_generic. If |
| max_gen_ptrs is later incremented, it will be caught in net_assign_generic. |
| |
| The Linux kernel CVE team has assigned CVE-2024-36883 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 4.19.314 with commit 3cdc34d76c4f777579e28ad373979d36c030cfd3 |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 5.4.276 with commit 7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 5.10.217 with commit 0c3248bc708a7797be573214065cf908ff1f54c7 |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 5.15.159 with commit 9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030 |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 6.1.91 with commit 2d60ff5874aefd006717ca5e22ac1e25eac29c42 |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 6.6.31 with commit b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 6.8.10 with commit f4f94587e1bf87cb40ec33955a9d90148dd026ab |
| Issue introduced in 3.3 with commit 073862ba5d249c20bd5c49fc6d904ff0e1f6a672 and fixed in 6.9 with commit a26ff37e624d12e28077e5b24d2b264f62764ad6 |
| Issue introduced in 3.0.19 with commit 561331eae0a03d0c4cf60f3cf485aa3e8aa5ab48 |
| Issue introduced in 3.2.3 with commit a2c82f7bee1ffa9eafa1fb0bd886a7eea8c9e497 |
| |
| 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-2024-36883 |
| 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/core/net_namespace.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/3cdc34d76c4f777579e28ad373979d36c030cfd3 |
| https://git.kernel.org/stable/c/7b0e64583eab8c1d896b47e5dd0bf2e7d86ec41f |
| https://git.kernel.org/stable/c/0c3248bc708a7797be573214065cf908ff1f54c7 |
| https://git.kernel.org/stable/c/9518b79bfd2fbf99fa9b7e8e36bcb1825e7ba030 |
| https://git.kernel.org/stable/c/2d60ff5874aefd006717ca5e22ac1e25eac29c42 |
| https://git.kernel.org/stable/c/b6dbfd5bcc267a95a0bf1bf96af46243f96ec6cd |
| https://git.kernel.org/stable/c/f4f94587e1bf87cb40ec33955a9d90148dd026ab |
| https://git.kernel.org/stable/c/a26ff37e624d12e28077e5b24d2b264f62764ad6 |
