| 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-2022-48748: net: bridge: vlan: fix memory leak in __allowed_ingress |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: bridge: vlan: fix memory leak in __allowed_ingress |
| |
| When using per-vlan state, if vlan snooping and stats are disabled, |
| untagged or priority-tagged ingress frame will go to check pvid state. |
| If the port state is forwarding and the pvid state is not |
| learning/forwarding, untagged or priority-tagged frame will be dropped |
| but skb memory is not freed. |
| Should free skb when __allowed_ingress returns false. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48748 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit a580c76d534c7360ba68042b19cb255e8420e987 and fixed in 5.10.96 with commit 446ff1fc37c74093e81db40811a07b5a19f1d797 |
| Issue introduced in 5.6 with commit a580c76d534c7360ba68042b19cb255e8420e987 and fixed in 5.15.19 with commit c5e216e880fa6f2cd9d4a6541269377657163098 |
| Issue introduced in 5.6 with commit a580c76d534c7360ba68042b19cb255e8420e987 and fixed in 5.16.5 with commit 14be8d448fca6fe7b2a413831eedd55aef6c6511 |
| Issue introduced in 5.6 with commit a580c76d534c7360ba68042b19cb255e8420e987 and fixed in 5.17 with commit fd20d9738395cf8e27d0a17eba34169699fccdff |
| |
| 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-2022-48748 |
| 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/bridge/br_vlan.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/446ff1fc37c74093e81db40811a07b5a19f1d797 |
| https://git.kernel.org/stable/c/c5e216e880fa6f2cd9d4a6541269377657163098 |
| https://git.kernel.org/stable/c/14be8d448fca6fe7b2a413831eedd55aef6c6511 |
| https://git.kernel.org/stable/c/fd20d9738395cf8e27d0a17eba34169699fccdff |
