Description
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix accessing freed irq affinity_hint In stmmac_request_irq_multi_msi(), a pointer to the stack variable cpu_mask is passed to irq_set_affinity_hint(). This value is stored in irq_desc->affinity_hint, but once stmmac_request_irq_multi_msi() returns, the pointer becomes dangling. The affinity_hint is exposed via procfs with S_IRUGO permissions, allowing any unprivileged process to read it. Accessing this stale pointer can lead to: - a kernel oops or panic if the referenced memory has been released and unmapped, or - leakage of kernel data into userspace if the memory is re-used for other purposes. All platforms that use stmmac with PCI MSI (Intel, Loongson, etc) are affected.
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
8deec94c6040bb4a767f6e9456a0a44c7f2e713e to < 2fbf67ddb8a0d0efc00d2df496a9843ec318d48baffected8deec94c6040bb4a767f6e9456a0a44c7f2e713e to < 960dab23f6d405740c537d095f90a4ee9ddd9285affected8deec94c6040bb4a767f6e9456a0a44c7f2e713e to < 442312c2a90d60c7a5197246583fa91d9e579985affected8deec94c6040bb4a767f6e9456a0a44c7f2e713e to < e148266e104fce396ad624079a6812ac3a9982efaffected8deec94c6040bb4a767f6e9456a0a44c7f2e713e to < 9e51a6a44e2c4de780a26e8fe110d708e806a8cdaffected8deec94c6040bb4a767f6e9456a0a44c7f2e713e to < c60d101a226f18e9a8f01bb4c6ca2b47dfcb15efaffected
Linux Linux
Default version status: affected
5.13affected0 to < 5.13unaffected6.1.164 to ≤ 6.1.*unaffected6.6.117 to ≤ 6.6.*unaffected6.12.36 to ≤ 6.12.*unaffected6.13.12 to ≤ 6.13.*unaffected6.14.3 to ≤ 6.14.*unaffected6.15 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2fbf67ddb8a0d0efc00d2df496a9843ec318d48b ↗
- https://git.kernel.org/stable/c/960dab23f6d405740c537d095f90a4ee9ddd9285 ↗
- https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985 ↗
- https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef ↗
- https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd ↗
- https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef ↗