5.5

CVE-2022-48933: netfilter: nf_tables: fix memory leak during stateful obj update

Analyzed
AliasesUBUNTU-CVE-2022-48933DEBIAN-CVE-2022-48933
Published 22-08-2024Last modified 11-05-2026

Vulnerability summary

CVE-2022-48933 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.1% 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 (NVD)
EPSS score
0.21%
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 4 · Related 4
SUSE-SU-2024:3225-1SUSE-SU-2024:3249-1SUSE-SU-2025:01620-1SUSE-SU-2025:01640-1

Timeline

  1. 22-08-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane. The transaction logic allocates a temporary object for this purpose. The ->init function was called for this object, so plain kfree() leaks resources. We must call ->destroy function of the object. nft_obj_destroy does this, but it also decrements the module refcount, but the update path doesn't increment it. To avoid special-casing the update object release, do module_get for the update case too and release it via nft_obj_destroy().

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% 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.

Ubuntu95 products
  • linux< 5.4.0-117.132
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1078.84
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ d62d0ba97b5803183e70cfded7f7b9da76893bf5, < 53026346a94c43f35c32b18804041bc483271d87 | ≥ d62d0ba97b5803183e70cfded7f7b9da76893bf5, < 7e9880e81d3fd6a43c202f205717485290432826 | ≥ d62d0ba97b5803183e70cfded7f7b9da76893bf5, < e96e204ee6fa46702f6c94c3c69a09e69e0eac52 | ≥ d62d0ba97b5803183e70cfded7f7b9da76893bf5, < 34bb90e407e3288f610558beaae54ecaa32b11c4 | ≥ d62d0ba97b5803183e70cfded7f7b9da76893bf5, < dad3bdeef45f81a6e90204bcc85360bb76eccec7 | 5.4
  • linux_kernel≥ 5.4, < 5.4.182 | ≥ 5.5, < 5.10.103 | ≥ 5.11, < 5.15.26 | ≥ 5.16, < 5.16.12
Debian1 product
  • linux< 5.16.12-1

3 vendors · 98 products

References

9 links