Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix race between dump and ip_set_list resize The release path of ip_set_dump_do() and ip_set_dump_done() read inst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw() of the array pointer. These run from netlink_recvmsg() without the nfnl mutex and without an RCU read-side critical section. A concurrent ip_set_create() can grow the array: it publishes the new array, calls synchronize_net() and then kvfree()s the old one. Since the dump paths read the array outside any RCU reader, synchronize_net() does not wait for them and the old array can be freed while they still index into it, causing a use-after-free. The dumped set itself stays pinned via set->ref_netlink, so only the array load needs protecting. Take rcu_read_lock() around it, matching ip_set_get_byname() and __ip_set_put_byindex(). BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) Read of size 8 at addr ffff88800b5c4018 by task exploit/150 Call Trace: ... kasan_report (mm/kasan/report.c:595) ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) netlink_dump (net/netlink/af_netlink.c:2325) netlink_recvmsg (net/netlink/af_netlink.c:1976) sock_recvmsg (net/socket.c:1159) __sys_recvfrom (net/socket.c:2315) ... Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7] RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698) Kernel panic - not syncing: Fatal exception
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before a7a299277959683204d73333c32c092fd69327d4; affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before 1bc67c3fc98e9fc07032cc56afcdbc690c47d11e; affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710; affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before 96fbafc20ebd9a613736c2998b89c539fe3042f5; affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before ff86ea9b7fdf70564e60436fbee68c96bc459943; affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before 81d54c766337b923eec26da0a13406760b091093; affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before e8ee198bbc04a32d336e79160fde980e0235b39f; affected 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 before 7cd9103283b26b917360ec99d7d2f2d761bcf1ab; affected 2f6bf7917f55f9dae913193e49672b3598620eab; affected 4.19.5 before 4.20 |
| Linux / Linux | affected 4.20; unaffected 0 before 4.20; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a7a299277959683204d73333c32c092fd69327d4
- https://git.kernel.org/stable/c/1bc67c3fc98e9fc07032cc56afcdbc690c47d11e
- https://git.kernel.org/stable/c/e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710
- https://git.kernel.org/stable/c/96fbafc20ebd9a613736c2998b89c539fe3042f5
- https://git.kernel.org/stable/c/ff86ea9b7fdf70564e60436fbee68c96bc459943
- https://git.kernel.org/stable/c/81d54c766337b923eec26da0a13406760b091093
- https://git.kernel.org/stable/c/e8ee198bbc04a32d336e79160fde980e0235b39f
- https://git.kernel.org/stable/c/7cd9103283b26b917360ec99d7d2f2d761bcf1ab
ADP enrichment
No English description supplied.
No references supplied.