Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop() pipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the to_offset argument on every iteration, including the last one where i == m->field_count - 1. This reads one element past the end of the stack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS] with NFT_PIPAPO_MAX_FIELDS == 16). Although pipapo_unmap() returns early when is_last is true without using the to_offset value, the argument is evaluated at the call site before the function body executes, making this a genuine out-of-bounds stack read confirmed by KASAN: BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables] Read of size 4 at addr ffff8000810e71a4 This frame has 1 object: [32, 160) 'rulemap' The buggy address is at offset 164 -- exactly 4 bytes past the end of the rulemap array. Pass 0 instead of rulemap[i + 1].n on the last iteration to avoid the out-of-bounds read.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3c4287f62044a90e73a561aa05fc46e62da173da before 1957e793196e7f8557374fd4eda53abcbb42e1c0; affected 3c4287f62044a90e73a561aa05fc46e62da173da before 57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e; affected 3c4287f62044a90e73a561aa05fc46e62da173da before 60c1d18781e37bfb96290b86510eb01c5fa24d75; affected 3c4287f62044a90e73a561aa05fc46e62da173da before 0a55d62cdb628923d8a21724374a70c76ac7d19d; affected 3c4287f62044a90e73a561aa05fc46e62da173da before dfbdac719198778b581bc0dd055df2542edb8c62; affected 3c4287f62044a90e73a561aa05fc46e62da173da before e047f6fbb975f685d6c9fcef95b3b7787a79b46d; affected 3c4287f62044a90e73a561aa05fc46e62da173da before 324b749aa5b2d516ccfab933df9d3f56e7807f5f; affected 3c4287f62044a90e73a561aa05fc46e62da173da before d6d8cd2db236a9dd13dbc2d05843b3445cc964b5 |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; 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/1957e793196e7f8557374fd4eda53abcbb42e1c0
- https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e
- https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75
- https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d
- https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62
- https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d
- https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f
- https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5