5.5

CVE-2023-3772: Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()

Modified
AliasesUBUNTU-CVE-2023-3772DEBIAN-CVE-2023-3772CGA-24pg-hc28-583j
Published 25-07-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-3772 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 41.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 61 · Related 52
DLA-3623-1DLA-3710-1DSA-5492-1MGASA-2023-0328MGASA-2023-0331RHSA-2023:6583

Timeline

  1. 25-07-2023
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in xfrm_update_ae_params(), leading to a possible kernel crash and denial of service.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.45% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu106 products
  • linuxAll versions (No fix recorded) | < 4.4.0-246.280 | < 4.15.0-219.230 | < 5.4.0-166.183 | < 5.15.0-88.98
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1124.130 | < 4.4.0-1162.177 | < 4.15.0-1162.175 | < 5.4.0-1113.123 | < 5.15.0-1049.54
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard83 products
  • hyperv-daemons-6.18All versions (No fix recorded)
  • hyperv-daemons-genericAll versions (No fix recorded)
  • linux-aws-6.12< 6.12.65-r0 | All versions (No fix recorded)
  • linux-aws-6.12-boot-installedAll versions (No fix recorded)
  • linux-aws-6.12-fips-boot-installedAll versions (No fix recorded)
Redhat3 products
Debian2 products
Fedoraproject1 product
Linux1 product

6 vendors · 196 products

References

35 links
Show all 35 references