PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release
In the Linux kernel, the following vulnerability has been resolved:
PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release
The fields dma_chan_tx and dma_chan_rx of the struct pci_epf_test can be
NULL even after EPF initialization. Then it is prudent to check that
they have non-NULL values before releasing the channels. Add the checks
in pci_epf_test_clean_dma_chan().
Without the checks, NULL pointer dereferences happen and they can lead
to a kernel panic in some cases:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050
Call trace:
dma_release_channel+0x2c/0x120 (P)
pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test]
pci_epc_deinit_notify+0x74/0xc0
tegra_pcie_ep_pex_rst_irq+0x250/0x5d8
irq_thread_fn+0x34/0xb8
irq_thread+0x18c/0x2e8
kthread+0x14c/0x210
ret_from_fork+0x10/0x20
[mani: trimmed the stack trace]
CVE 정보
EPSS
EPSS는 취약점이 악용될 가능성을 예측하는 점수 모델입니다.
EPSS 점수
EPSS 모델은 0과 1(0~100%) 사이의 확률 점수를 생성합니다. 점수가 높을수록 취약점이 악용될 가능성이 높습니다.
날짜
EPSS V0
EPSS V1
EPSS V2 (> 2022-02-04)
EPSS V3 (> 2025-03-07)
EPSS V4 (> 2025-03-17)
2025-10-28
–
–
–
–
0.02%
2025-11-03
–
–
–
–
0.02%
2025-11-18
–
–
–
–
0.02%
2025-11-21
–
–
–
–
0.02%
2025-11-26
–
–
–
–
0.04%
2025-11-29
–
–
–
–
0.05%
2025-12-06
–
–
–
–
0.05%
2025-12-07
–
–
–
–
0.05%
2025-12-08
–
–
–
–
0.05%
2025-12-22
–
–
–
–
0.04%
2026-01-04
–
–
–
–
0.04%
2026-01-22
–
–
–
–
0.04%
2026-01-23
–
–
–
–
0.04%
2026-03-01
–
–
–
–
0.05%
2026-03-08
–
–
–
–
0.05%
2026-03-22
–
–
–
–
0.05%
2026-03-29
–
–
–
–
0.03%
2026-04-12
–
–
–
–
0.04%
2026-05-31
–
–
–
–
0.05%
2026-06-07
–
–
–
–
0.05%
EPSS 백분위수
백분위수는 EPSS 점수에 따라 CVE의 순위를 매기는 데 사용됩니다. 예를 들어 EPSS 점수 기준 95번째 백분위수의 CVE는 다른 CVE의 95%보다 악용될 가능성이 높습니다.