CVE-2022-49339
net: ipv6: unexport __init-annotated seg6_hmac_init()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: net: ipv6: unexport __init-annotated seg6_hmac_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 caller (net/ipv6/seg6.c) and the callee (net/ipv6/seg6_hmac.c) belong to the same module. It seems an internal function call in ipv6.ko.
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)
- 0.28% · top 80% 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.
Affected products
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < 64aef8efe96c1616142c4476a05731306fc4494e
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < ab8b2c2de273ec1d698a18e399896a6febb5cda0
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < 317260b3eb6384a05a8af212308fa50f3b2e8290
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < 5d9c1b081ad28c852a97e10dd75412546497694a
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < 1084716f76c8045eadf92a9d9a62641f3c8d8c90
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < 3e6de5037148c5a93a436b1e8d2edad3dac11755
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < 9ba4416b831eeb4d185e88e73488d1d21288e63a
- affected bf355b8d2c30a289232042cacc1cfaea4923936c – < 5801f064e35181c71857a80ff18af4dbec3c5f5c
- affected 4.10
- unaffected < 4.10
- 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 (8)
- https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e (opens in a new tab)
- https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0 (opens in a new tab)
- https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290 (opens in a new tab)
- https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a (opens in a new tab)
- https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90 (opens in a new tab)
- https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755 (opens in a new tab)
- https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a (opens in a new tab)
- https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c (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-2022-49339)Record last updated .