CVE-2022-49345
net: xfrm: unexport __init-annotated xfrm4_protocol_init()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: net: xfrm: unexport __init-annotated xfrm4_protocol_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the only in-tree call-site, net/ipv4/xfrm4_policy.c is never compiled as modular. (CONFIG_XFRM is boolean)
Timeline
ID reserved
By Linux
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
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)
- 0.29% · top 78% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < c58d82a1264813e69119c13e9804e2e60b664ad5
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < e53cd3814504b2cadaba4d5a8a07eeea9ddacd03
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < 31f3c6a4dcd3260a386e62cef2d5b36e902600a1
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < ef6d2354de238b065d8799c80da4be9a6af18e39
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < be3884d5cd04ccd58294b83a02d70b7c5fca19d3
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < 85a055c03691e51499123194a14a0c249cf33227
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < 2b253fbc9f7b5db18d716436bdcf8ecef09fd63d
- affected 2f32b51b609faea1e40bb8c5bd305f1351740936 – < 4a388f08d8784af48f352193d2b72aaf167a57a1
- affected 3.15
- unaffected < 3.15
- unaffected 4.9.318 – ≤ 4.9.*
- unaffected 4.14.283 – ≤ 4.14.*
- unaffected 4.19.247 – ≤ 4.19.*
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.122 – ≤ 5.10.*
- unaffected 5.15.47 – ≤ 5.15.*
- unaffected 5.17.15 – ≤ 5.17.*
- unaffected 5.18.4 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (9)
- https://git.kernel.org/stable/c/c58d82a1264813e69119c13e9804e2e60b664ad5 (opens in a new tab)
- https://git.kernel.org/stable/c/e53cd3814504b2cadaba4d5a8a07eeea9ddacd03 (opens in a new tab)
- https://git.kernel.org/stable/c/31f3c6a4dcd3260a386e62cef2d5b36e902600a1 (opens in a new tab)
- https://git.kernel.org/stable/c/ef6d2354de238b065d8799c80da4be9a6af18e39 (opens in a new tab)
- https://git.kernel.org/stable/c/be3884d5cd04ccd58294b83a02d70b7c5fca19d3 (opens in a new tab)
- https://git.kernel.org/stable/c/85a055c03691e51499123194a14a0c249cf33227 (opens in a new tab)
- https://git.kernel.org/stable/c/e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2 (opens in a new tab)
- https://git.kernel.org/stable/c/2b253fbc9f7b5db18d716436bdcf8ecef09fd63d (opens in a new tab)
- https://git.kernel.org/stable/c/4a388f08d8784af48f352193d2b72aaf167a57a1 (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-2022-49345)Record last updated .