7.8

CVE-2022-48636: linux NULL Pointer Dereference

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2022-48636DEBIAN-CVE-2022-48636
Published 28-04-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2022-48636 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 13.8% 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 14 · Related 14
SUSE-SU-2024:1643-1SUSE-SU-2024:1644-1SUSE-SU-2024:1646-1SUSE-SU-2024:1659-1SUSE-SU-2024:1663-1SUSE-SU-2024:1870-1

Timeline

  1. 28-04-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.

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 21-09-2026

21-09-202621-10-2026
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

Ubuntu101 products
  • linuxAll versions (No fix recorded) | < 4.15.0-204.215 | < 5.4.0-136.153 | < 5.15.0-57.63
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1150.163 | < 5.4.0-1093.101 | < 5.15.0-1027.31
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < d86b4267834e6d4af62e3073e48166e349ab1b70 | ≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < 49f401a98b318761ca2e15d4c7869a20043fbed4 | ≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < aaba5ff2742043705bc4c02fd0b2b246e2e16da1 | ≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < 2e473351400e3dd66f0b71eddcef82ee45a584c1 | ≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20b | ≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < d3a67c21b18f33c79382084af556557c442f12a6 | ≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < 650a2e79d176db753654d3dde88e53a2033036ac | ≥ 8e09f21574ea3028d5629e5de759e0b196c690c5, < db7ba07108a48c0f95b74fabbfd5d63e924f992d | 2.6.25
  • linux_kernel≥ 2.6.25, < 4.9.330 | ≥ 4.10, < 4.14.295 | ≥ 4.15, < 4.19.260 | ≥ 4.20, < 5.4.215 | ≥ 5.5, < 5.10.146 | ≥ 5.11, < 5.15.71 | ≥ 5.16, < 5.19.12 | 6.0:rc1 | 6.0:rc2 | 6.0:rc3 | 6.0:rc4 | 6.0:rc5 | 6.0:rc6
Debian1 product
  • linux< 6.0.2-1

3 vendors · 104 products

References

12 links
Show all 12 references