CVE-2022-49876

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49876
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49876.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49876
Downstream
Published
2025-05-01T14:10:25Z
Modified
2025-10-15T00:15:38.350230Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()
Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: fix general-protection-fault in ieee80211subifstart_xmit()

When device is running and the interface status is changed, the gpf issue is triggered. The problem triggering process is as follows: Thread A: Thread B ieee80211runtimechangeiftype() processonework() ... ... ieee80211dostop() ... ... ... sdata->bss = NULL ... ... ieee80211subifstartxmit() ieee80211multicasttounicast //!sdata->bss->multicastto_unicast cause gpf issue

When the interface status is changed, the sending queue continues to send packets. After the bss is set to NULL, the bss is accessed. As a result, this causes a general-protection-fault issue.

The following is the stack information: general protection fault, probably for non-canonical address 0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f] Workqueue: mld mldifcwork RIP: 0010:ieee80211subifstartxmit+0x25b/0x1310 Call Trace: <TASK> devhardstartxmit+0x1be/0x990 _devqueuexmit+0x2c9a/0x3b60 ip6finishoutput2+0xf92/0x1520 ip6finishoutput+0x6af/0x11e0 ip6output+0x1ed/0x540 mldsendpack+0xa09/0xe70 mldifcwork+0x71c/0xdb0 processonework+0x9bf/0x1710 workerthread+0x665/0x1080 kthread+0x2e4/0x3a0 retfromfork+0x1f/0x30 </TASK>

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f856373e2f31ffd340e47e2b00027bd4070f74b3
Fixed
03eb68c72cee249aeb7af7d04a83c033aca3d6d9
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f856373e2f31ffd340e47e2b00027bd4070f74b3
Fixed
780854186946e0de2be192ee7fa5125666533b3a

Affected versions

v5.*

v5.19
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8

v6.*

v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.0.1
v6.0.2
v6.0.3
v6.0.4
v6.0.5
v6.0.6
v6.0.7
v6.0.8
v6.1-rc1

Database specific 

{
    "vanir_signatures": [
        {
            "signature_version": "v1",
            "signature_type": "Line",
            "target": {
                "file": "net/mac80211/tx.c"
            },
            "id": "CVE-2022-49876-129c85a7",
            "digest": {
                "line_hashes": [
                    "234419052485809845882714201724550416178",
                    "155949749208729892736743817732763781694",
                    "307547175670089808078666849624505157327"
                ],
                "threshold": 0.9
            },
            "deprecated": false,
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@780854186946e0de2be192ee7fa5125666533b3a"
        },
        {
            "signature_version": "v1",
            "signature_type": "Line",
            "target": {
                "file": "net/mac80211/tx.c"
            },
            "id": "CVE-2022-49876-29d058f4",
            "digest": {
                "line_hashes": [
                    "234419052485809845882714201724550416178",
                    "155949749208729892736743817732763781694",
                    "307547175670089808078666849624505157327"
                ],
                "threshold": 0.9
            },
            "deprecated": false,
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@03eb68c72cee249aeb7af7d04a83c033aca3d6d9"
        },
        {
            "signature_version": "v1",
            "signature_type": "Function",
            "target": {
                "file": "net/mac80211/tx.c",
                "function": "ieee80211_subif_start_xmit"
            },
            "id": "CVE-2022-49876-80728cdb",
            "digest": {
                "length": 729.0,
                "function_hash": "241204398978316335628323459181185382396"
            },
            "deprecated": false,
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@780854186946e0de2be192ee7fa5125666533b3a"
        },
        {
            "signature_version": "v1",
            "signature_type": "Function",
            "target": {
                "file": "net/mac80211/tx.c",
                "function": "ieee80211_subif_start_xmit"
            },
            "id": "CVE-2022-49876-bd9cc946",
            "digest": {
                "length": 729.0,
                "function_hash": "241204398978316335628323459181185382396"
            },
            "deprecated": false,
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@03eb68c72cee249aeb7af7d04a83c033aca3d6d9"
        }
    ]
}

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.19.0
Fixed
6.0.9