| 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-2024-56645: can: j1939: j1939_session_new(): fix skb reference counting |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| can: j1939: j1939_session_new(): fix skb reference counting |
| |
| Since j1939_session_skb_queue() does an extra skb_get() for each new |
| skb, do the same for the initial one in j1939_session_new() to avoid |
| refcount underflow. |
| |
| [mkl: clean up commit message] |
| |
| The Linux kernel CVE team has assigned CVE-2024-56645 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 5.4.287 with commit 224e606a8d8e8c7db94036272c47a37455667313 |
| Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 5.10.231 with commit b3282c2bebeeb82ceec492ee4972f51ee7a4a132 |
| Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 5.15.174 with commit 4199dd78a59896e091d3a7a05a77451aa7fd724d |
| Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.1.120 with commit f117cba69cbbd496babb3defcdf440df4fd6fe14 |
| Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.6.66 with commit 426d94815e12b6bdb9a75af294fbbafb9301601d |
| Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.12.5 with commit 68fceb143b635cdc59fed3896d5910aff38f345e |
| Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.13 with commit a8c695005bfe6569acd73d777ca298ddddd66105 |
| |
| 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-2024-56645 |
| 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/can/j1939/transport.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/224e606a8d8e8c7db94036272c47a37455667313 |
| https://git.kernel.org/stable/c/b3282c2bebeeb82ceec492ee4972f51ee7a4a132 |
| https://git.kernel.org/stable/c/4199dd78a59896e091d3a7a05a77451aa7fd724d |
| https://git.kernel.org/stable/c/f117cba69cbbd496babb3defcdf440df4fd6fe14 |
| https://git.kernel.org/stable/c/426d94815e12b6bdb9a75af294fbbafb9301601d |
| https://git.kernel.org/stable/c/68fceb143b635cdc59fed3896d5910aff38f345e |
| https://git.kernel.org/stable/c/a8c695005bfe6569acd73d777ca298ddddd66105 |
