CVE-2022-49539

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49539
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49539.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49539
Downstream
Published
2025-02-26T02:13:55Z
Modified
2025-10-21T10:14:19.652155Z
Summary
rtw89: ser: fix CAM leaks occurring in L2 reset
Details

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

rtw89: ser: fix CAM leaks occurring in L2 reset

The CAM, meaning address CAM and bssid CAM here, will get leaks during SER (system error recover) L2 reset process and ieee80211restarthw() which is called by L2 reset process eventually.

The normal flow would be like -> add interface (acquire 1) -> enter ips (release 1) -> leave ips (acquire 1) -> connection (occupy 1) <(A) 1 leak after L2 reset if non-sec connection>

The ieee80211restarthw() flow (under connection) -> ieee80211 reconfig -> add interface (acquire 1) -> leave ips (acquire 1) -> connection (occupy (A) + 2) <(B) 1 more leak>

Originally, CAM is released before HW restart only if connection is under security. Now, release CAM whatever connection it is to fix leak in (A). OTOH, check if CAM is already valid to avoid acquiring multiple times to fix (B).

Besides, if AP mode, release address CAM of all stations before HW restart.

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
e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd
Fixed
f6aff772c9978844529618d86aafb53e5d3ae161
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd
Fixed
b169f877f001a474fb89939842c390518160bcc5

Affected versions

v5.*

v5.15
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.18.2

Database specific

vanir_signatures

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        },
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            "file": "drivers/net/wireless/realtek/rtw89/cam.c",
            "function": "rtw89_cam_init_addr_cam"
        },
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        "id": "CVE-2022-49539-0efe8934",
        "deprecated": false,
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    },
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        "target": {
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b169f877f001a474fb89939842c390518160bcc5",
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]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
5.18.3