Description
In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Disable auto-enable of exclusive INTx IRQ Currently for devices requiring masking at the irqchip for INTx, ie. devices without DisINTx support, the IRQ is enabled in request_irq() and subsequently disabled as necessary to align with the masked status flag. This presents a window where the interrupt could fire between these events, resulting in the IRQ incrementing the disable depth twice. This would be unrecoverable for a user since the masked flag prevents nested enables through vfio. Instead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx is never auto-enabled, then unmask as required.
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
89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < 26389925d6c2126fb777821a0a983adca7ee6351affected89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < 561d5e1998d58b54ce2bbbb3e843b669aa0b3db5affected89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < b7a2f0955ffceffadfe098b40b50307431f45438affected89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < 139dfcc4d723ab13469881200c7d80f49d776060affected89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < 2a4a666c45107206605b7b5bc20545f8aabc4fa2affected89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < 3b3491ad0f80d913e7d255941d4470f4a4d9bfdaaffected89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < bf0bc84a20e6109ab07d5dc072067bd01eb931ecaffected89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 to < fe9a7082684eb059b925c535682e68c34d487d43affected
Linux Linux
Default version status: affected
3.6affected0 to < 3.6unaffected5.4.274 to ≤ 5.4.*unaffected5.10.215 to ≤ 5.10.*unaffected5.15.154 to ≤ 5.15.*unaffected6.1.84 to ≤ 6.1.*unaffected6.6.24 to ≤ 6.6.*unaffected6.7.12 to ≤ 6.7.*unaffected6.8.3 to ≤ 6.8.*unaffected6.9 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351 ↗
- https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5 ↗
- https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438 ↗
- https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060 ↗
- https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2 ↗
- https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda ↗
- https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec ↗
- https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43 ↗
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html ↗