Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop rfcomm_apply_pn() accepts the MTU value from a remote PN (Parameter Negotiation) frame without checking for zero. When the remote peer sends an MTU of zero, d->mtu is set to 0. This causes the sendmsg path to enter an infinite loop when fragmenting data, as each fragment has size == min_t(size_t, len, 0) == 0, so the remaining length never decreases. The infinite allocation of zero-length skbs exhausts all system memory. Fix by clamping d->mtu to RFCOMM_DEFAULT_MTU when the negotiated value is zero, consistent with the initial value assigned in rfcomm_dlc_alloc().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e7c0aa45ae6c5a338661b23812bfcdef50bf3e96affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < cbc2962da99b6b89345267d3aa74b4b573340548affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9b2e5f1928c99224345a9ed8c5dae5fc74964d6daffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < fc4851ff8dfb505e9a19efcc286712132bbd178daffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < f561e44261344adadf9d6a6dff31e3af9776d5c6affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < aeee917a4878af95f0c63e18c5f22eaf6299c7b8affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 3988cbb1be501dbff909a2ee024670e3c955a66daffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 44c98fd082eafd49d55a8a4077ff488175b2fe24affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e7c0aa45ae6c5a338661b23812bfcdef50bf3e96 ↗
- https://git.kernel.org/stable/c/cbc2962da99b6b89345267d3aa74b4b573340548 ↗
- https://git.kernel.org/stable/c/9b2e5f1928c99224345a9ed8c5dae5fc74964d6d ↗
- https://git.kernel.org/stable/c/fc4851ff8dfb505e9a19efcc286712132bbd178d ↗
- https://git.kernel.org/stable/c/f561e44261344adadf9d6a6dff31e3af9776d5c6 ↗
- https://git.kernel.org/stable/c/aeee917a4878af95f0c63e18c5f22eaf6299c7b8 ↗
- https://git.kernel.org/stable/c/3988cbb1be501dbff909a2ee024670e3c955a66d ↗
- https://git.kernel.org/stable/c/44c98fd082eafd49d55a8a4077ff488175b2fe24 ↗