| 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-2021-47539: rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() |
| |
| Need to call rxrpc_put_peer() for bundle candidate before kfree() as it |
| holds a ref to rxrpc_peer. |
| |
| [DH: v2: Changed to abstract out the bundle freeing code into a function] |
| |
| The Linux kernel CVE team has assigned CVE-2021-47539 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit 245500d853e9f20036cec7df4f6984ece4c6bf26 and fixed in 5.10.84 with commit 35b40f724c4ef0f683d94dab3af9ab38261d782b |
| Issue introduced in 5.10 with commit 245500d853e9f20036cec7df4f6984ece4c6bf26 and fixed in 5.15.7 with commit bc97458620e38961af9505cc060ad4cf5c9e4af7 |
| Issue introduced in 5.10 with commit 245500d853e9f20036cec7df4f6984ece4c6bf26 and fixed in 5.16 with commit ca77fba821351190777b236ce749d7c4d353102e |
| |
| 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-2021-47539 |
| 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/rxrpc/conn_client.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/35b40f724c4ef0f683d94dab3af9ab38261d782b |
| https://git.kernel.org/stable/c/bc97458620e38961af9505cc060ad4cf5c9e4af7 |
| https://git.kernel.org/stable/c/ca77fba821351190777b236ce749d7c4d353102e |
