7.8

CVE-2023-52574: linux NULL Pointer Dereference

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2023-52574DEBIAN-CVE-2023-52574
Published 02-03-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2023-52574 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 18
RHSA-2024:2394RHSA-2024:2950RHSA-2024:3138SUSE-SU-2024:0856-1SUSE-SU-2024:0857-1SUSE-SU-2024:0925-1

Timeline

  1. 02-03-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu114 products
  • linuxAll versions (No fix recorded) | < 4.4.0-274.308 | < 4.15.0-243.255 | < 5.4.0-171.189 | < 5.15.0-94.104
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1149.155 | < 4.4.0-1187.202 | < 4.15.0-1186.199 | < 5.4.0-1118.128 | < 5.15.0-1053.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < 1779eb51b9cc628cee551f252701a85a2a50a457 | ≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < a7fb47b9711101d2405b0eb1276fb1f9b9b270c7 | ≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < c5f6478686bb45f453031594ae19b6c9723a780d | ≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < b44dd92e2afd89eb6e9d27616858e72a67bdc1a7 | ≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < cd05eec2ee0cc396813a32ef675634e403748255 | ≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < 2f0acb0736ecc3eb85dc80ad2790d634dcb10b58 | ≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < cac50d9f5d876be32cb9aa21c74018468900284d | ≥ 1d76efe1577b4323609b1bcbfafa8b731eda071a, < 492032760127251e5540a5716a70996bacf2a3fd | 3.7
  • linux_kernel≥ 3.7, < 4.14.327 | ≥ 4.15, < 4.19.296 | ≥ 4.20, < 5.4.258 | ≥ 5.5, < 5.10.198 | ≥ 5.11, < 5.15.134 | ≥ 5.16, < 6.1.56 | ≥ 6.2, < 6.5.6 | 6.6:rc1 | 6.6:rc2
Debian1 product
  • linux< 6.1.64-1 | < 6.5.6-1

3 vendors · 117 products

References

19 links
Show all 19 references