Answer in brief
CVE-2022-49339 records a Medium severity (CVSS 5.5) vulnerability in net: ipv6: unexport __init-annotated seg6_hmac_init(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=bf355b8d2c30a289232042cacc1cfaea4923936c <64aef8efe96c1616142c4476a05731306fc4494e || >=bf355b8d2c30a289232042cacc1cfaea4923936c <ab8b2c2de273ec1d698a18e399896a6febb5cda0 || >=bf355b8d2c30a289232042cacc1cfaea4923936c <317260b3eb6384a05a8af212308fa50f3b2e8290 || >=bf355b8d2c30a289232042cacc1cfaea4923936c <5d9c1b081ad28c852a97e10dd75412546497694a || >=bf355b8d2c30a289232042cacc1cfaea4923936c <1084716f76c8045eadf92a9d9a62641f3c8d8c90 || >=bf355b8d2c30a289232042cacc1cfaea4923936c <3e6de5037148c5a93a436b1e8d2edad3dac11755 || >=bf355b8d2c30a289232042cacc1cfaea4923936c <9ba4416b831eeb4d185e88e73488d1d21288e63a || >=bf355b8d2c30a289232042cacc1cfaea4923936c <5801f064e35181c71857a80ff18af4dbec3c5f5c | 64aef8efe96c1616142c4476a05731306fc4494e, ab8b2c2de273ec1d698a18e399896a6febb5cda0, 317260b3eb6384a05a8af212308fa50f3b2e8290, 5d9c1b081ad28c852a97e10dd75412546497694a, 1084716f76c8045eadf92a9d9a62641f3c8d8c90, 3e6de5037148c5a93a436b1e8d2edad3dac11755, 9ba4416b831eeb4d185e88e73488d1d21288e63a, 5801f064e35181c71857a80ff18af4dbec3c5f5c |
| Linux/Linuxgeneric | 4.10 | Not reported |
Published upstream
Feb 26, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.