Bug 2063718 (CVE-2022-26966) - CVE-2022-26966 kernel: heap memory leak in drivers/net/usb/sr9700.c
Summary: CVE-2022-26966 kernel: heap memory leak in drivers/net/usb/sr9700.c
Keywords:
Status: NEW
Alias: CVE-2022-26966
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
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Depends On: 2072673 2072674 2072675 2072676 2072677 2072678 2075413 2075414 2178486 2178487
Blocks: 2063721
TreeView+ depends on / blocked
 
Reported: 2022-03-14 08:46 UTC by TEJ RATHI
Modified: 2023-10-09 11:35 UTC (History)
47 users (show)

Fixed In Version: kernel 5.17 rc6
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Description TEJ RATHI 2022-03-14 08:46:05 UTC 
An issue was discovered in the Linux kernel before 5.16.12. drivers/net/usb/sr9700.c allows attackers to obtain sensitive information from heap memory via crafted frame lengths from a device.

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.10
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e9da0b56fe27206b49f39805f7dcda8a89379062
Comment 2 Rohit Keshri 2022-04-06 18:25:05 UTC 
There was no shipped kernel version that was seen affected by this problem. These files are not built in our source code.
Comment 10 Jan Stancek 2022-12-05 10:13:58 UTC 
(In reply to Rohit Keshri from comment #2)
> These files are not built in our source code.

Recent aarch64 kernel has sr9700 module enabled:

$ wget http://download.eng.bos.redhat.com/brewroot/vol/rhel-9/packages/kernel/5.14.0/205.el9/aarch64/kernel-core-5.14.0-205.el9.aarch64.rpm
$ rpm2cpio kernel-core-5.14.0-205.el9.aarch64.rpm | cpio -id
$ grep SR9700 lib/modules/5.14.0-205.el9.aarch64/config
CONFIG_USB_NET_SR9700=m

$ readelf -a lib/modules/5.14.0-205.el9.aarch64/kernel/drivers/net/usb/sr9700.ko | grep sr9700_rx_fixup
    38: 0000000000000010   304 FUNC    LOCAL  DEFAULT    3 sr9700_rx_fixup
Comment 16 Rohit Keshri 2023-03-15 05:22:03 UTC 
In reply to comment #10:
> (In reply to Rohit Keshri from comment #2)
> > These files are not built in our source code.
> 
> Recent aarch64 kernel has sr9700 module enabled:
> 
> $ wget
> http://download.eng.bos.redhat.com/brewroot/vol/rhel-9/packages/kernel/5.14.
> 0/205.el9/aarch64/kernel-core-5.14.0-205.el9.aarch64.rpm
> $ rpm2cpio kernel-core-5.14.0-205.el9.aarch64.rpm | cpio -id
> $ grep SR9700 lib/modules/5.14.0-205.el9.aarch64/config
> CONFIG_USB_NET_SR9700=m
> 
> $ readelf -a
> lib/modules/5.14.0-205.el9.aarch64/kernel/drivers/net/usb/sr9700.ko | grep
> sr9700_rx_fixup
>     38: 0000000000000010   304 FUNC    LOCAL  DEFAULT    3 sr9700_rx_fixup

Thank you Jan, I have made the adjustment.
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