CVE-2024-50001
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix error path in multi-packet WQE transmit Remove the erroneous unmap in case no DMA mapping was established The multi-packet WQE transmit code attempts to obtain a DMA…
Does this matter?
Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix error path in multi-packet WQE transmit Remove the erroneous unmap in case no DMA mapping was established The multi-packet WQE transmit code attempts to obtain a DMA mapping for the skb. This could fail, e.g. under memory pressure, when the IOMMU driver just can't allocate more memory for page tables. While the code tries to handle this in the path below the err_unmap label it erroneously unmaps one entry from the sq's FIFO list of active mappings. Since the current map attempt failed this unmap is removing some random DMA mapping that might still be required. If the PCI function now presents that IOVA, the IOMMU may assumes a rogue DMA access and e.g. on s390 puts the PCI function in error state. The erroneous behavior was seen in a stress-test environment that created memory pressure.
- 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
- 0.33% probability · 26th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-755
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/26fad69b34fcba80d5c7d9e651f628e6ac927754Patch
- https://git.kernel.org/stable/c/2bcae12c795f32ddfbf8c80d1b5f1d3286341c32Patch
- https://git.kernel.org/stable/c/8bb8c12fb5e2b1f03d603d493c92941676f109b5Patch
- https://git.kernel.org/stable/c/ca36d6c1a49b6965c86dd528a73f38bc62d9c625Patch
- https://git.kernel.org/stable/c/ce828b347cf1b3c1b12b091d02463c35ce5097f5Patch
- https://git.kernel.org/stable/c/ecf310aaf256acbc8182189fe0aa1021c3ddef72Patch
- https://git.kernel.org/stable/c/fc357e78176945ca7bcacf92ab794b9ccd41b4f4Patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.