usb: musb: Fix musb_gadget.c rxstate overflow bug
Published Dec 30, 2025
No CVSS score
EPSS 0.23%
Description
The usb function device call musb_gadget_queue() adds the passed request to musb_ep::req_list,If the (request->length > musb_ep->packet_sz) and (is_buffer_mapped(req) return false),the rxstate() will copy all data in fifo to request->buf which may cause request->buf out of bounds.
Fix it by add the length check : fifocnt = min_t(unsigned, request->length - request->actual, fifocnt);
Affected products
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- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
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- Version StatusaffectedConstraints
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- Version
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- Version 4.3StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<4.3
- Version 4.14.296StatusunaffectedConstraints<=4.14.*
- Version 4.19.262StatusunaffectedConstraints<=4.19.*
- Version 4.9.331StatusunaffectedConstraints<=4.9.*
- Version 5.10.150StatusunaffectedConstraints<=5.10.*
- Version 5.15.75StatusunaffectedConstraints<=5.15.*
- Version 5.19.17StatusunaffectedConstraints<=5.19.*
- Version 5.4.220StatusunaffectedConstraints<=5.4.*
- Version 6.0.3StatusunaffectedConstraints<=6.0.*
- Version 6.1StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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No data.
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
No CWE recorded.
References (15)
- https://access.redhat.com/security/cve/CVE-2022-50876 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2426106 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-55920 Advisory
- https://git.kernel.org/stable/c/3c84c7f592c4ba38f54ddaddd0115acc443025db
- https://git.kernel.org/stable/c/523313881f0aa5cbbdb548ce575b6e58b202bd76
- https://git.kernel.org/stable/c/7c80f3a918ba9aa26fb699ee887064ec3af0396a
- https://git.kernel.org/stable/c/826f84ab04a5cafe484ea9c2c85a3930068e5cb7
- https://git.kernel.org/stable/c/a1008c8b9f357691ce6a8fdb8f157aecb2d79167
- https://git.kernel.org/stable/c/a9ccd2ab1becf5dcb6d57e9fcd981f5eaa606c96
- https://git.kernel.org/stable/c/acf0006f2b2b2ca672988875fd154429aafb2a9b
- https://git.kernel.org/stable/c/d6afcab1b48f4051211c50145b9e91be3b1b42c9
- https://git.kernel.org/stable/c/eea4c860c3b366369eff0489d94ee4f0571d467d
- https://lore.kernel.org/linux-cve-announce/2025123023-CVE-2022-50876-b365@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2022-50876
- https://www.cve.org/CVERecord?id=CVE-2022-50876
Change history (0)
No recorded changes yet.