5.5

CVE-2024-50296: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2024-50296DEBIAN-CVE-2024-50296
Published 19-11-2024Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2024-50296 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.9% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.25%
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 56 · Related 54
DLA-4008-1DLA-4075-1DSA-5818-1SUSE-SU-2024:4314-1SUSE-SU-2024:4316-1SUSE-SU-2024:4318-1

Timeline

  1. 19-11-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: hns3: fix kernel crash when uninstalling driver When the driver is uninstalled and the VF is disabled concurrently, a kernel crash occurs. The reason is that the two actions call function pci_disable_sriov(). The num_VFs is checked to determine whether to release the corresponding resources. During the second calling, num_VFs is not 0 and the resource release function is called. However, the corresponding resource has been released during the first invoking. Therefore, the problem occurs: [15277.839633][T50670] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... [15278.131557][T50670] Call trace: [15278.134686][T50670] klist_put+0x28/0x12c [15278.138682][T50670] klist_del+0x14/0x20 [15278.142592][T50670] device_del+0xbc/0x3c0 [15278.146676][T50670] pci_remove_bus_device+0x84/0x120 [15278.151714][T50670] pci_stop_and_remove_bus_device+0x6c/0x80 [15278.157447][T50670] pci_iov_remove_virtfn+0xb4/0x12c [15278.162485][T50670] sriov_disable+0x50/0x11c [15278.166829][T50670] pci_disable_sriov+0x24/0x30 [15278.171433][T50670] hnae3_unregister_ae_algo_prepare+0x60/0x90 [hnae3] [15278.178039][T50670] hclge_exit+0x28/0xd0 [hclge] [15278.182730][T50670] __se_sys_delete_module.isra.0+0x164/0x230 [15278.188550][T50670] __arm64_sys_delete_module+0x1c/0x30 [15278.193848][T50670] invoke_syscall+0x50/0x11c [15278.198278][T50670] el0_svc_common.constprop.0+0x158/0x164 [15278.203837][T50670] do_el0_svc+0x34/0xcc [15278.207834][T50670] el0_svc+0x20/0x30 For details, see the following figure. rmmod hclge disable VFs ---------------------------------------------------- hclge_exit() sriov_numvfs_store() ... device_lock() pci_disable_sriov() hns3_pci_sriov_configure() pci_disable_sriov() sriov_disable() sriov_disable() if !num_VFs : if !num_VFs : return; return; sriov_del_vfs() sriov_del_vfs() ... ... klist_put() klist_put() ... ... num_VFs = 0; num_VFs = 0; device_unlock(); In this patch, when driver is removing, we get the device_lock() to protect num_VFs, just like sriov_numvfs_store().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

0.00 pp

From 0.25% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.25%

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

Ubuntu133 products
  • linux< 4.15.0-237.249 | < 5.4.0-208.228 | < 5.15.0-133.144 | < 6.8.0-58.60
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1180.193 | < 5.4.0-1140.150 | < 5.15.0-1078.85 | < 6.8.0-1027.29
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b06ad258e01389ca3ff13bc180f3fcd6a608f1cd, < a0df055775f30850c0da8f7dab40d67c0fd63908 | ≥ c4b64011e458aa2b246cd4e42012cfd83d2d9a5c, < 7ae4e56de7dbd0999578246a536cf52a63f4056d | ≥ d36b15e3e7b5937cb1f6ac590a85facc3a320642, < 590a4b2d4e0b73586e88bce9b8135b593355ec09 | ≥ 0dd8a25f355b4df2d41c08df1716340854c7d4c5, < e36482b222e00cc7aeeea772fc0cf2943590bc4d | ≥ 0dd8a25f355b4df2d41c08df1716340854c7d4c5, < 76b155e14d9b182ce83d32ada2d0d7219ea8c8dd | ≥ 0dd8a25f355b4df2d41c08df1716340854c7d4c5, < 719edd9f3372ce7fb3b157647c6658672946874b | ≥ 0dd8a25f355b4df2d41c08df1716340854c7d4c5, < b5c94e4d947d15d521e935ff10c5a22a7883dea5 | ≥ 0dd8a25f355b4df2d41c08df1716340854c7d4c5, < df3dff8ab6d79edc942464999d06fbaedf8cdd18 | 9b5a29f0acefa3eb1dbe2fa302b393eeff64d933 | ≥ 4.19.214, < 4.19.324 | ≥ 5.4.156, < 5.4.286 | ≥ 5.10.76, < 5.10.230 | ≥ 5.14.15, < 5.15 | 5.15
  • linux_kernel≥ 4.19.214, < 4.19.324 | ≥ 5.4.156, < 5.4.286 | ≥ 5.10.76, < 5.10.230 | ≥ 5.14.15, < 5.15 | ≥ 5.15, < 5.15.172 | ≥ 5.16, < 6.1.117 | ≥ 6.2, < 6.6.61 | ≥ 6.7, < 6.11.8 | 6.12:rc1 | 6.12:rc2 | 6.12:rc3 | 6.12:rc4 | 6.12:rc5 | 6.12:rc6
Debian1 product
  • linux< 6.1.119-1 | < 6.11.9-1

3 vendors · 136 products

References

56 links
Show all 56 references