Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net/iucv: take a reference on the socket found in afiucv_hs_rcv() afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock, drops the lock, and then passes the socket to the afiucv_hs_callback_*() handlers without holding a reference. AF_IUCV sockets are not RCU-protected and are freed synchronously by iucv_sock_kill() -> sock_put(), so a concurrent close can free the socket in the window between read_unlock() and the handler, which then dereferences freed memory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()). Take a reference with sock_hold() while the socket is still on the list and release it with sock_put() once the handler has run.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3881ac441f642d56503818123446f7298442236b before 5739be5c19495d709d902a2912c9102ce78740d5; affected 3881ac441f642d56503818123446f7298442236b before bc6c6e546ffff8865daaeb622ef348c2d481e80f; affected 3881ac441f642d56503818123446f7298442236b before e3e0679fc950191aff8f27fa78abcfc2462cff4a; affected 3881ac441f642d56503818123446f7298442236b before 4dc0e63abf8bc7ba8892e617c1fb8b204361e022; affected 3881ac441f642d56503818123446f7298442236b before 1801cb20a5025a787d6853e19c38db138344b4b4; affected 3881ac441f642d56503818123446f7298442236b before c75a950e77356e526672cba4584080c6c8b793b6; affected 3881ac441f642d56503818123446f7298442236b before 5595ea59cdf29182cf6a270cacc1426c57b603de; affected 3881ac441f642d56503818123446f7298442236b before 4fa349156043dc119721d067329714179f501749 |
| Linux / Linux | affected 3.2; unaffected 0 before 3.2; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.148 through 6.6.*; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5739be5c19495d709d902a2912c9102ce78740d5
- https://git.kernel.org/stable/c/bc6c6e546ffff8865daaeb622ef348c2d481e80f
- https://git.kernel.org/stable/c/e3e0679fc950191aff8f27fa78abcfc2462cff4a
- https://git.kernel.org/stable/c/4dc0e63abf8bc7ba8892e617c1fb8b204361e022
- https://git.kernel.org/stable/c/1801cb20a5025a787d6853e19c38db138344b4b4
- https://git.kernel.org/stable/c/c75a950e77356e526672cba4584080c6c8b793b6
- https://git.kernel.org/stable/c/5595ea59cdf29182cf6a270cacc1426c57b603de
- https://git.kernel.org/stable/c/4fa349156043dc119721d067329714179f501749
ADP enrichment
No English description supplied.
No references supplied.