CVE - CVE-2023-52574

CVE-ID
CVE-2023-52574	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: team: fix null-ptr-deref when team device type is changed Get a null-ptr-deref bug as follows with reproducer [1]. BUG: kernel NULL pointer dereference, address: 0000000000000228 ... RIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q] ... Call Trace: <TASK> ? __die+0x24/0x70 ? page_fault_oops+0x82/0x150 ? exc_page_fault+0x69/0x150 ? asm_exc_page_fault+0x26/0x30 ? vlan_dev_hard_header+0x35/0x140 [8021q] ? vlan_dev_hard_header+0x8e/0x140 [8021q] neigh_connected_output+0xb2/0x100 ip6_finish_output2+0x1cb/0x520 ? nf_hook_slow+0x43/0xc0 ? ip6_mtu+0x46/0x80 ip6_finish_output+0x2a/0xb0 mld_sendpack+0x18f/0x250 mld_ifc_work+0x39/0x160 process_one_work+0x1e6/0x3f0 worker_thread+0x4d/0x2f0 ? __pfx_worker_thread+0x10/0x10 kthread+0xe5/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 [1] $ teamd -t team0 -d -c '{"runner": {"name": "loadbalance"}}' $ ip link add name t-dummy type dummy $ ip link add link t-dummy name t-dummy.100 type vlan id 100 $ ip link add name t-nlmon type nlmon $ ip link set t-nlmon master team0 $ ip link set t-nlmon nomaster $ ip link set t-dummy up $ ip link set team0 up $ ip link set t-dummy.100 down $ ip link set t-dummy.100 master team0 When enslave a vlan device to team device and team device type is changed from non-ether to ether, header_ops of team device is changed to vlan_header_ops. That is incorrect and will trigger null-ptr-deref for vlan->real_dev in vlan_dev_hard_header() because team device is not a vlan device. Cache eth_header_ops in team_setup(), then assign cached header_ops to header_ops of team net device when its type is changed from non-ether to ether to fix the bug.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457 URL:https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457 MISC:https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58 URL:https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58 MISC:https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd URL:https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd MISC:https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7 URL:https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7 MISC:https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7 URL:https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7 MISC:https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d URL:https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d MISC:https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d URL:https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d MISC:https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255 URL:https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255
Assigning CNA
kernel.org
Date Record Created
20240302	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240302)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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