Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: cap advertised IP tunnel headroom IP tunnel devices derive their advertised needed_headroom from lower output devices. A stack of user-created devices can make the derived value larger than the 16-bit skb header offsets can represent. Once IP output reserves it, skb head expansion can wrap those offsets. The runtime transmit path already caps a growing needed_headroom at 512. Apply the same cap when tunnel configuration publishes needed_headroom derived from a lower output device. Capping the advertised value is safe: IP tunnel transmit still expands the skb when a packet needs more headroom. A nonsensical stacked configuration can therefore incur an extra reallocation, but it cannot publish an unbounded reservation to upper layers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before fb889a619723032140f5d983a3a34d25a5a2bed4; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before b160422f8103574425e2834130e169d84c94fa1d; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before d36e75f5669140b66515ad3a176ca6337bd80a5e; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before 84783961cb8bdb36b4f41a02ce43aafc6d52b176; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before bc4e05ae66c9797a0972ac44326e69c5305e0020; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before af0ee8f04bea22cdb331fa3509e17f81b48938ad; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before 9144f2c53a04465a6878172b523f640313c5559e; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 before 6b222adeb9340306e2ff97127c76117abb9b3df8 |
| Linux / Linux | affected 3.11; unaffected 0 before 3.11; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/fb889a619723032140f5d983a3a34d25a5a2bed4
- https://git.kernel.org/stable/c/b160422f8103574425e2834130e169d84c94fa1d
- https://git.kernel.org/stable/c/d36e75f5669140b66515ad3a176ca6337bd80a5e
- https://git.kernel.org/stable/c/84783961cb8bdb36b4f41a02ce43aafc6d52b176
- https://git.kernel.org/stable/c/bc4e05ae66c9797a0972ac44326e69c5305e0020
- https://git.kernel.org/stable/c/af0ee8f04bea22cdb331fa3509e17f81b48938ad
- https://git.kernel.org/stable/c/9144f2c53a04465a6878172b523f640313c5559e
- https://git.kernel.org/stable/c/6b222adeb9340306e2ff97127c76117abb9b3df8
ADP enrichment
No English description supplied.
No references supplied.