CVE-2024-26659
In the Linux kernel, the following vulnerability has been resolved: xhci: handle isoc Babble and Buffer Overrun events properly xHCI 4.9 explicitly forbids assuming that the xHC has released its ownership of a multi-TRB TD when it reports an error on…
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: xhci: handle isoc Babble and Buffer Overrun events properly xHCI 4.9 explicitly forbids assuming that the xHC has released its ownership of a multi-TRB TD when it reports an error on one of the early TRBs. Yet the driver makes such assumption and releases the TD, allowing the remaining TRBs to be freed or overwritten by new TDs. The xHC should also report completion of the final TRB due to its IOC flag being set by us, regardless of prior errors. This event cannot be recognized if the TD has already been freed earlier, resulting in "Transfer event TRB DMA ptr not part of current TD" error message. Fix this by reusing the logic for processing isoc Transaction Errors. This also handles hosts which fail to report the final completion. Fix transfer length reporting on Babble errors. They may be caused by device malfunction, no guarantee that the buffer has been filled.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2aa7bcfdbb46241c701811bbc0d64d7884e3346cPatch
- https://git.kernel.org/stable/c/2e3ec80ea7ba58bbb210e83b5a0afefee7c171d3Patch
- https://git.kernel.org/stable/c/418456c0ce56209610523f21734c5612ee634134Patch
- https://git.kernel.org/stable/c/696e4112e5c1ee61996198f0ebb6ca3fab55166ePatch
- https://git.kernel.org/stable/c/7c4650ded49e5b88929ecbbb631efb8b0838e811Patch
- https://git.kernel.org/stable/c/f5e7ffa9269a448a720e21f1ed1384d118298c97Patch
- https://git.kernel.org/stable/c/2aa7bcfdbb46241c701811bbc0d64d7884e3346cPatch
- https://git.kernel.org/stable/c/2e3ec80ea7ba58bbb210e83b5a0afefee7c171d3Patch
- https://git.kernel.org/stable/c/418456c0ce56209610523f21734c5612ee634134Patch
- https://git.kernel.org/stable/c/696e4112e5c1ee61996198f0ebb6ca3fab55166ePatch
- https://git.kernel.org/stable/c/7c4650ded49e5b88929ecbbb631efb8b0838e811Patch
- https://git.kernel.org/stable/c/f5e7ffa9269a448a720e21f1ed1384d118298c97Patch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.