CVE-2022-49876
- 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
- 2025-05-01T14:10:25.040Z
- Modified
- 2025-12-04T18:07:10.034091Z
- 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>
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49876.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/03eb68c72cee249aeb7af7d04a83c033aca3d6d9
- https://git.kernel.org/stable/c/780854186946e0de2be192ee7fa5125666533b3a
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49876.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49876