| 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-2024-26595: mlxsw: spectrum_acl_tcam: Fix NULL pointer dereference in error path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mlxsw: spectrum_acl_tcam: Fix NULL pointer dereference in error path |
| |
| When calling mlxsw_sp_acl_tcam_region_destroy() from an error path after |
| failing to attach the region to an ACL group, we hit a NULL pointer |
| dereference upon 'region->group->tcam' [1]. |
| |
| Fix by retrieving the 'tcam' pointer using mlxsw_sp_acl_to_tcam(). |
| |
| [1] |
| BUG: kernel NULL pointer dereference, address: 0000000000000000 |
| [...] |
| RIP: 0010:mlxsw_sp_acl_tcam_region_destroy+0xa0/0xd0 |
| [...] |
| Call Trace: |
| mlxsw_sp_acl_tcam_vchunk_get+0x88b/0xa20 |
| mlxsw_sp_acl_tcam_ventry_add+0x25/0xe0 |
| mlxsw_sp_acl_rule_add+0x47/0x240 |
| mlxsw_sp_flower_replace+0x1a9/0x1d0 |
| tc_setup_cb_add+0xdc/0x1c0 |
| fl_hw_replace_filter+0x146/0x1f0 |
| fl_change+0xc17/0x1360 |
| tc_new_tfilter+0x472/0xb90 |
| rtnetlink_rcv_msg+0x313/0x3b0 |
| netlink_rcv_skb+0x58/0x100 |
| netlink_unicast+0x244/0x390 |
| netlink_sendmsg+0x1e4/0x440 |
| ____sys_sendmsg+0x164/0x260 |
| ___sys_sendmsg+0x9a/0xe0 |
| __sys_sendmsg+0x7a/0xc0 |
| do_syscall_64+0x40/0xe0 |
| entry_SYSCALL_64_after_hwframe+0x63/0x6b |
| |
| The Linux kernel CVE team has assigned CVE-2024-26595 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.11 with commit 22a677661f5624539d394f681276171f92d714df and fixed in 6.1.120 with commit 75fa2d8b3c0175b519c99ace54ab8474cfd0077e |
| Issue introduced in 4.11 with commit 22a677661f5624539d394f681276171f92d714df and fixed in 6.6.14 with commit 817840d125a370626895df269c50c923b79b0a39 |
| Issue introduced in 4.11 with commit 22a677661f5624539d394f681276171f92d714df and fixed in 6.7.2 with commit d0a1efe417c97a1e9b914056ee6b86f1ef75fe1f |
| Issue introduced in 4.11 with commit 22a677661f5624539d394f681276171f92d714df and fixed in 6.8 with commit efeb7dfea8ee10cdec11b6b6ba4e405edbe75809 |
| |
| 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-2024-26595 |
| 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: |
| drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.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/75fa2d8b3c0175b519c99ace54ab8474cfd0077e |
| https://git.kernel.org/stable/c/817840d125a370626895df269c50c923b79b0a39 |
| https://git.kernel.org/stable/c/d0a1efe417c97a1e9b914056ee6b86f1ef75fe1f |
| https://git.kernel.org/stable/c/efeb7dfea8ee10cdec11b6b6ba4e405edbe75809 |
