Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: usb: class: cdc-wdm: fix reordering issue in read code path Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1]. Fix it by using WRITE_ONCE and memory barriers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected afba937e540c902c989cd516fd97ea0c8499bb27 before 638328ca9c17ae6511ad62198c57bae32ffa3c91; affected afba937e540c902c989cd516fd97ea0c8499bb27 before 170e8daca24da6edb4be82ab01abf44e87af387b; affected afba937e540c902c989cd516fd97ea0c8499bb27 before c8fa96ed021923dae147bcd9f9205b8df7b82360; affected afba937e540c902c989cd516fd97ea0c8499bb27 before 4ee3062bf2c9a722afef429826e8607eaf3fc6a0; affected afba937e540c902c989cd516fd97ea0c8499bb27 before 276aef0fd2b92f41b920ac891c72cadeee957934; affected afba937e540c902c989cd516fd97ea0c8499bb27 before 67ed312124bb1b61858778ac0b985b48961c862a; affected afba937e540c902c989cd516fd97ea0c8499bb27 before e3c874b05901dc519054b5107d16620e6d2b5fea; affected afba937e540c902c989cd516fd97ea0c8499bb27 before 8df672bfe3ec2268c2636584202755898e547173 |
| Linux / Linux | affected 2.6.26; unaffected 0 before 2.6.26; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.167 through 6.1.*; unaffected 6.6.130 through 6.6.*; unaffected 6.12.78 through 6.12.*; unaffected 6.18.19 through 6.18.*; unaffected 6.19.9 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91
- https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b
- https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360
- https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0
- https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934
- https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a
- https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea
- https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173