CVE-2022-48933
netfilter: nf_tables: fix memory leak during stateful obj update
- Published
- Updated
- Reserved
- Assigned by
- Linux
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().
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected d62d0ba97b5803183e70cfded7f7b9da76893bf5 – < 53026346a94c43f35c32b18804041bc483271d87
- affected d62d0ba97b5803183e70cfded7f7b9da76893bf5 – < 7e9880e81d3fd6a43c202f205717485290432826
- affected d62d0ba97b5803183e70cfded7f7b9da76893bf5 – < e96e204ee6fa46702f6c94c3c69a09e69e0eac52
- affected d62d0ba97b5803183e70cfded7f7b9da76893bf5 – < 34bb90e407e3288f610558beaae54ecaa32b11c4
- affected d62d0ba97b5803183e70cfded7f7b9da76893bf5 – < dad3bdeef45f81a6e90204bcc85360bb76eccec7
- affected 5.4
- unaffected < 5.4
- unaffected 5.4.182 – ≤ 5.4.*
- unaffected 5.10.103 – ≤ 5.10.*
- unaffected 5.15.26 – ≤ 5.15.*
- unaffected 5.16.12 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (5)
- https://git.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87 (opens in a new tab)
- https://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826 (opens in a new tab)
- https://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52 (opens in a new tab)
- https://git.kernel.org/stable/c/34bb90e407e3288f610558beaae54ecaa32b11c4 (opens in a new tab)
- https://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48933)Record last updated .