5.5

CVE-2024-38633: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2024-38633DEBIAN-CVE-2024-38633
Published 21-06-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2024-38633 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
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 35 · Related 31
DLA-3840-1DSA-5730-1MGASA-2024-0263MGASA-2024-0266SUSE-SU-2024:2372-1SUSE-SU-2024:2394-1

Timeline

  1. 21-06-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: serial: max3100: Update uart_driver_registered on driver removal The removal of the last MAX3100 device triggers the removal of the driver. However, code doesn't update the respective global variable and after insmod — rmmod — insmod cycle the kernel oopses: max3100 spi-PRP0001:01: max3100_probe: adding port 0 BUG: kernel NULL pointer dereference, address: 0000000000000408 ... RIP: 0010:serial_core_register_port+0xa0/0x840 ... max3100_probe+0x1b6/0x280 [max3100] spi_probe+0x8d/0xb0 Update the actual state so next time UART driver will be registered again. Hugo also noticed, that the error path in the probe also affected by having the variable set, and not cleared. Instead of clearing it move the assignment after the successfull uart_register_driver() call.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

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

Ubuntu128 products
  • linuxAll versions (No fix recorded) | < 4.4.0-262.296 | < 4.15.0-232.244 | < 5.4.0-192.212 | < 5.15.0-121.131 | < 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1139.145 | < 4.4.0-1177.192 | < 4.15.0-1176.189 | < 5.4.0-1130.140 | < 5.15.0-1069.75 | < 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < 21a61a7fbcfdd3493cede43ebc7c4dfae2147a8b | ≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < 9db4222ed8cd3e50b81c8b910ae74c26427a4003 | ≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < e8e2a4339decad7e59425b594a98613402652d72 | ≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < 361a92c9038e8c8c3996f8eeaa14522a8ad90752 | ≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < b6eb7aff23e05f362e8c9b560f6ac5e727b70e00 | ≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < e8a10089eddba40d4b2080c9d3fc2d2b2488f762 | ≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < fa84ca78b048dfb00df0ef446f5c35e0a98ca6a0 | ≥ 7831d56b0a3544cbb6f82f76c34ca95e24d5b676, < 712a1fcb38dc7cac6da63ee79a88708fbf9c45ec | 2.6.30
  • linux_kernel≥ 2.6.30, < 4.19.316 | ≥ 4.20, < 5.4.278 | ≥ 5.5, < 5.10.219 | ≥ 5.11, < 5.15.161 | ≥ 5.16, < 6.1.93 | ≥ 6.2, < 6.6.33 | ≥ 6.7, < 6.9.4
Debian1 product
  • linux< 6.1.94-1 | < 6.9.7-1

3 vendors · 131 products

References

36 links
Show all 36 references