8.8

CVE-2024-49936: linux Use After Free

CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2024-49936DEBIAN-CVE-2024-49936
Published 21-10-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2024-49936 is a high (CVSS 8.8) Use After Free vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
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 55 · Related 53
DLA-4008-1DLA-4075-1MGASA-2024-0344MGASA-2024-0345OPENSUSE-SU-2024:14500-1OPENSUSE-SU-2025:14705-1

Timeline

  1. 21-10-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: prevent UAF in xenvif_flush_hash() During the list_for_each_entry_rcu iteration call of xenvif_flush_hash, kfree_rcu does not exist inside the rcu read critical section, so if kfree_rcu is called when the rcu grace period ends during the iteration, UAF occurs when accessing head->next after the entry becomes free. Therefore, to solve this, you need to change it to list_for_each_entry_safe.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.27%

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

Ubuntu135 products
  • linuxAll versions (No fix recorded) | < 5.4.0-211.231 | < 5.15.0-127.137 | < 6.8.0-54.56
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1142.152 | < 5.15.0-1073.79 | < 6.8.0-1023.25
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 3c4423b0c4b98213b3438e15061e1d08220e6982 | ≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c | ≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < a0465723b8581cad27164c9073fd780904cd22d4 | ≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < efcff6ce7467f01f0753609f420333f3f2ceceda | ≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 143edf098b80669d05245b2f2367dd156a83a2c5 | ≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < d408889d4b54f5501e4becc4dbbb9065143fbf4e | ≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 54d8639af5568fc41c0e274fc3ec9cf86c59fcbb | ≥ 40d8abdee806d496a60ee607a6d01b1cd7fabaf0, < 0fa5e94a1811d68fbffa0725efe6d4ca62c03d12 | 4.7
  • linux_kernel< 5.10.227 | ≥ 5.11, < 5.15.168 | ≥ 5.16, < 6.1.113 | ≥ 6.2, < 6.6.55 | ≥ 6.7, < 6.10.14 | ≥ 6.11, < 6.11.3
Debian1 product
  • linux< 6.1.115-1 | < 6.11.4-1

3 vendors · 138 products

References

48 links
Show all 48 references