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CVE-2022-49339— net: ipv6: unexport __init-annotated seg6_hmac_init()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于seg6_hmac_init被标记为__init并导出，可能导致内核崩溃。

AI Predicted 4.3 Difficulty: Hard EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1564 · Hide Artifacts

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux bf355b8d2c30a289232042cacc1cfaea4923936c< 64aef8efe96c1616142c4476a05731306fc4494e affected
bf355b8d2c30a289232042cacc1cfaea4923936c< ab8b2c2de273ec1d698a18e399896a6febb5cda0 affected
bf355b8d2c30a289232042cacc1cfaea4923936c< 317260b3eb6384a05a8af212308fa50f3b2e8290 affected
bf355b8d2c30a289232042cacc1cfaea4923936c< 5d9c1b081ad28c852a97e10dd75412546497694a affected
bf355b8d2c30a289232042cacc1cfaea4923936c< 1084716f76c8045eadf92a9d9a62641f3c8d8c90 affected
bf355b8d2c30a289232042cacc1cfaea4923936c< 3e6de5037148c5a93a436b1e8d2edad3dac11755 affected
bf355b8d2c30a289232042cacc1cfaea4923936c< 9ba4416b831eeb4d185e88e73488d1d21288e63a affected
bf355b8d2c30a289232042cacc1cfaea4923936c< 5801f064e35181c71857a80ff18af4dbec3c5f5c affected
… +10 more rows
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I. Basic Information for CVE-2022-49339

Vulnerability Information
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Vulnerability Title
net: ipv6: unexport __init-annotated seg6_hmac_init()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于seg6_hmac_init被标记为__init并导出，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux bf355b8d2c30a289232042cacc1cfaea4923936c ~ 64aef8efe96c1616142c4476a05731306fc4494e -
Linux Linux 4.10 -

II. Public POCs for CVE-2022-49339

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III. Intelligence Information for CVE-2022-49339

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Patches & Fixes for CVE-2022-49339 (8)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-49149 9.8 CRITICAL rxrpc: Fix call timer start racing with call destruction
CVE-2022-49561 9.8 CRITICAL netfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-49407 9.8 CRITICAL dlm: fix plock invalid read
CVE-2022-49362 9.8 CRITICAL NFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-49280 9.8 CRITICAL NFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-49356 9.8 CRITICAL SUNRPC: Trap RDMA segment overflows
CVE-2022-49418 9.8 CRITICAL NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-49094 9.8 CRITICAL net/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-49093 9.8 CRITICAL skbuff: fix coalescing for page_pool fragment recycling
CVE-2022-49260 9.8 CRITICAL crypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-49194 9.8 CRITICAL net: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-49201 9.8 CRITICAL ibmvnic: fix race between xmit and reset
CVE-2022-49058 9.1 CRITICAL cifs: potential buffer overflow in handling symlinks
CVE-2022-49535 8.8 HIGH scsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI
CVE-2022-49159 8.8 HIGH scsi: qla2xxx: Implement ref count for SRB
CVE-2022-49138 8.8 HIGH Bluetooth: hci_event: Ignore multiple conn complete events
CVE-2022-49479 8.8 HIGH mt76: fix tx status related use-after-free race on station removal
CVE-2022-49470 8.8 HIGH Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event
CVE-2022-49111 8.8 HIGH Bluetooth: Fix use after free in hci_send_acl
CVE-2022-49114 8.8 HIGH scsi: libfc: Fix use after free in fc_exch_abts_resp()

Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49339

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