Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: ipv4: bound TCP reordering sysctl writes and MTU probe sizes Reject invalid `net.ipv4.tcp_reordering` values before they reach TCP socket state. The sysctl is stored as an `int` but copied into the `u32` `tp->reordering` field for new sockets, so negative writes wrap to large values. With `tcp_mtu_probing=2`, the wrapped value can overflow the `tcp_mtu_probe()` size calculation and drive the MTU probing path into an out-of-bounds read. Route `tcp_reordering` writes through `proc_dointvec_minmax()` and require it to be at least 1. Also require `tcp_max_reordering` to be at least 1 so the configured maximum cannot become negative either. When registering the table for a non-init network namespace, relocate `extra2` pointers that refer into `init_net.ipv4` so the `tcp_reordering` upper bound follows that namespace's `tcp_max_reordering`. Harden `tcp_mtu_probe()` itself by computing `size_needed` as `u64`. This keeps the send queue and window checks from being bypassed through signed integer overflow.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before f0d88a4cd03affff6c08adf6c63964e235aede43; affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before 27ddf4486c7dbf5bdd393fa8bef6b67179796d98; affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before 782708ca1ea1f68b8cbb5ea3a7f5f18d0000efae; affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before e81f805824a8109504fce090641b17d135b48cd1; affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before 99206ce2244f8a3ed64298d0667c9055845a5dc7; affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before bbae351c0f32f7c200249e4aa6561b2b419dcf69; affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before a094ac95d3b69adfa1676eb9c8eae6835d4f1671; affected 91cc17c0e5e5ada156a8d5787a2509d263ea6bbf before efb8763d7bbb40cff4cc55a6b62c3095a038149c |
| Linux / Linux | affected 2.6.24; unaffected 0 before 2.6.24; 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/f0d88a4cd03affff6c08adf6c63964e235aede43
- https://git.kernel.org/stable/c/27ddf4486c7dbf5bdd393fa8bef6b67179796d98
- https://git.kernel.org/stable/c/782708ca1ea1f68b8cbb5ea3a7f5f18d0000efae
- https://git.kernel.org/stable/c/e81f805824a8109504fce090641b17d135b48cd1
- https://git.kernel.org/stable/c/99206ce2244f8a3ed64298d0667c9055845a5dc7
- https://git.kernel.org/stable/c/bbae351c0f32f7c200249e4aa6561b2b419dcf69
- https://git.kernel.org/stable/c/a094ac95d3b69adfa1676eb9c8eae6835d4f1671
- https://git.kernel.org/stable/c/efb8763d7bbb40cff4cc55a6b62c3095a038149c
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.