CVE-2022-50317
drm/bridge: megachips: Fix a null pointer dereference bug
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: megachips: Fix a null pointer dereference bug When removing the module we will get the following warning: [ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered [ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130 [ 31.921825] Call Trace: [ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw] [ 31.923139] i2c_device_remove+0x181/0x1f0 The two bridges (stdp2690, stdp4028) do not probe at the same time, so the driver does not call ge_b850v3_resgiter() when probing, causing the driver to try to remove the object that has not been initialized. Fix this by checking whether both the bridges are probed.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 7649972d97fb98578fbc4a351416cf72895e7c4d – < aaa512ad1e59f2edf8a9e4f2b167a44b24670679
- affected 16e3827904932eccfba0915f0c93b519de3536ac – < 5bc20bafcd87ba0858ab772cefc7047cb51bc249
- affected 50ad94f8654a53ec9ca3604a7a23cbaf166e0119 – < 1daf69228e310938177119c4eadcd30fc75c81e0
- affected b8d10f601f226f055df8b5368d7ea7f369136cd5 – < 877e92e9b1bdeb580b31a46061005936be902cd4
- affected 405856460d3e7aefb7c1aef047ec88fc4ef2e2a5 – < 4610e7a4111fa3f3ce27c09d6d94008c55f1cd31
- affected 11632d4aa2b3f126790e81a4415d6c23103cf8bb – < 21764467ab396d9f08921e0a5ffa1214244e1ad9
- affected 11632d4aa2b3f126790e81a4415d6c23103cf8bb – < 7371fad5cfe6eada6bb5523c895fd6074b15c2b9
- affected 11632d4aa2b3f126790e81a4415d6c23103cf8bb – < 1ff673333d46d2c1b053ebd0c1c7c7c79e36943e
- affected e449461989f0674f188d30494ffd3f5ba74c1a05
- affected 4.14.263 – < 4.14.296
- affected 4.19.226 – < 4.19.262
- affected 5.4.174 – < 5.4.220
- affected 5.10.94 – < 5.10.150
- affected 5.15.17 – < 5.15.75
- affected 5.16.3 – < 5.17
- affected 5.17
- unaffected < 5.17
- unaffected 4.14.296 – ≤ 4.14.*
- unaffected 4.19.262 – ≤ 4.19.*
- unaffected 5.4.220 – ≤ 5.4.*
- unaffected 5.10.150 – ≤ 5.10.*
- unaffected 5.15.75 – ≤ 5.15.*
- unaffected 5.19.17 – ≤ 5.19.*
- unaffected 6.0.3 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (8)
- https://git.kernel.org/stable/c/aaa512ad1e59f2edf8a9e4f2b167a44b24670679 (opens in a new tab)
- https://git.kernel.org/stable/c/5bc20bafcd87ba0858ab772cefc7047cb51bc249 (opens in a new tab)
- https://git.kernel.org/stable/c/1daf69228e310938177119c4eadcd30fc75c81e0 (opens in a new tab)
- https://git.kernel.org/stable/c/877e92e9b1bdeb580b31a46061005936be902cd4 (opens in a new tab)
- https://git.kernel.org/stable/c/4610e7a4111fa3f3ce27c09d6d94008c55f1cd31 (opens in a new tab)
- https://git.kernel.org/stable/c/21764467ab396d9f08921e0a5ffa1214244e1ad9 (opens in a new tab)
- https://git.kernel.org/stable/c/7371fad5cfe6eada6bb5523c895fd6074b15c2b9 (opens in a new tab)
- https://git.kernel.org/stable/c/1ff673333d46d2c1b053ebd0c1c7c7c79e36943e (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50317)Record last updated .