CVE-2026-90088
Last modified
CVE-2026-90088 is a vulnerability of currently unknown severity. 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.
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 Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e7c0aa45ae6c5a338661b23812bfcdef50bf3e96; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cbc2962da99b6b89345267d3aa74b4b573340548; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9b2e5f1928c99224345a9ed8c5dae5fc74964d6d; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fc4851ff8dfb505e9a19efcc286712132bbd178d; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f561e44261344adadf9d6a6dff31e3af9776d5c6; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < aeee917a4878af95f0c63e18c5f22eaf6299c7b8; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3988cbb1be501dbff909a2ee024670e3c955a66d; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 44c98fd082eafd49d55a8a4077ff488175b2fe24 |
| Linux | Linux | 2.6.12 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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