5.5

CVE-2023-53032: netfilter: ipset: Fix overflow before widen in the bitmap_ip_create() function.

Analyzed
AliasesUBUNTU-CVE-2023-53032DEBIAN-CVE-2023-53032
Published 27-03-2025Last modified 11-05-2026

Vulnerability summary

CVE-2023-53032 is a medium (CVSS 5.5) Integer Overflow or Wraparound vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 10% 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 (NVD)
EPSS score
0.20%
0%100%
Low · 0.00 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 2 · Related 2
SUSE-SU-2025:01600-1SUSE-SU-2025:02312-1

Timeline

  1. 27-03-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Fix overflow before widen in the bitmap_ip_create() function. When first_ip is 0, last_ip is 0xFFFFFFFF, and netmask is 31, the value of an arithmetic expression 2 << (netmask - mask_bits - 1) is subject to overflow due to a failure casting operands to a larger data type before performing the arithmetic. Note that it's harmless since the value will be checked at the next step. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% 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.

Ubuntu113 products
  • linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-70.77
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1034.38
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b9fed748185a96b7cfe74afac4bd228e8af16f01, < e137d9bb26bd85ce07323a38e38ceb0b160db841 | ≥ b9fed748185a96b7cfe74afac4bd228e8af16f01, < dfd834ccc1b88bbbab81b9046a3a539dd0c2d14f | ≥ b9fed748185a96b7cfe74afac4bd228e8af16f01, < feefb33eefa166fc3e0fd17547b0bc0cb3baced9 | ≥ b9fed748185a96b7cfe74afac4bd228e8af16f01, < 4e6a70fd840400e3a2e784a6673968a3eb2431c0 | ≥ b9fed748185a96b7cfe74afac4bd228e8af16f01, < 511cf17b2447fc41cfef8d71936e1fa53e395c1e | ≥ b9fed748185a96b7cfe74afac4bd228e8af16f01, < e88865876d47c790be0d5e23973499d75d034364 | ≥ b9fed748185a96b7cfe74afac4bd228e8af16f01, < 9ea4b476cea1b7d461d16dda25ca3c7e616e2d15 | 3.7
  • linux_kernel≥ 3.7, < 4.14.303 | ≥ 4.15, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5, < 5.10.164 | ≥ 5.11, < 5.15.89 | ≥ 5.16, < 6.1.7 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4
Debian1 product
  • linux< 6.1.7-1

3 vendors · 116 products

References

11 links
Show all 11 references