Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e before 2fbf67ddb8a0d0efc00d2df496a9843ec318d48b; affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e before 960dab23f6d405740c537d095f90a4ee9ddd9285; affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e before 442312c2a90d60c7a5197246583fa91d9e579985; affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e before e148266e104fce396ad624079a6812ac3a9982ef; affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e before 9e51a6a44e2c4de780a26e8fe110d708e806a8cd; affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e before c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 6.1.164 through 6.1.*; unaffected 6.6.117 through 6.6.*; unaffected 6.12.36 through 6.12.*; unaffected 6.13.12 through 6.13.*; unaffected 6.14.3 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
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