CVE-2025-38581

crypto: ccp - Fix crash when rebind ccp device for ccp.ko

MEDIUM

5.5

CVSS Score

Published: August 19, 2025 at 05:03 PM UTC

Updated: June 17, 2026 at 09:17 AM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Fix crash when rebind ccp device for ccp.ko When CONFIG_CRYPTO_DEV_CCP_DEBUGFS is enabled, rebinding the ccp device causes the following crash: $ echo '0000:0a:00.2' > /sys/bus/pci/drivers/ccp/unbind $ echo '0000:0a:00.2' > /sys/bus/pci/drivers/ccp/bind [ 204.976930] BUG: kernel NULL pointer dereference, address: 0000000000000098 [ 204.978026] #PF: supervisor write access in kernel mode [ 204.979126] #PF: error_code(0x0002) - not-present page [ 204.980226] PGD 0 P4D 0 [ 204.981317] Oops: Oops: 0002 [#1] SMP NOPTI ... [ 204.997852] Call Trace: [ 204.999074] <TASK> [ 205.000297] start_creating+0x9f/0x1c0 [ 205.001533] debugfs_create_dir+0x1f/0x170 [ 205.002769] ? srso_return_thunk+0x5/0x5f [ 205.004000] ccp5_debugfs_setup+0x87/0x170 [ccp] [ 205.005241] ccp5_init+0x8b2/0x960 [ccp] [ 205.006469] ccp_dev_init+0xd4/0x150 [ccp] [ 205.007709] sp_init+0x5f/0x80 [ccp] [ 205.008942] sp_pci_probe+0x283/0x2e0 [ccp] [ 205.010165] ? srso_return_thunk+0x5/0x5f [ 205.011376] local_pci_probe+0x4f/0xb0 [ 205.012584] pci_device_probe+0xdb/0x230 [ 205.013810] really_probe+0xed/0x380 [ 205.015024] __driver_probe_device+0x7e/0x160 [ 205.016240] device_driver_attach+0x2f/0x60 [ 205.017457] bind_store+0x7c/0xb0 [ 205.018663] drv_attr_store+0x28/0x40 [ 205.019868] sysfs_kf_write+0x5f/0x70 [ 205.021065] kernfs_fop_write_iter+0x145/0x1d0 [ 205.022267] vfs_write+0x308/0x440 [ 205.023453] ksys_write+0x6d/0xe0 [ 205.024616] __x64_sys_write+0x1e/0x30 [ 205.025778] x64_sys_call+0x16ba/0x2150 [ 205.026942] do_syscall_64+0x56/0x1e0 [ 205.028108] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 205.029276] RIP: 0033:0x7fbc36f10104 [ 205.030420] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8d 05 e1 08 2e 00 8b 00 85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 f3 c3 66 90 41 54 55 49 89 d4 53 48 89 f5 This patch sets ccp_debugfs_dir to NULL after destroying it in ccp5_debugfs_destroy, allowing the directory dentry to be recreated when rebinding the ccp device. Tested on AMD Ryzen 7 1700X.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

4.13 ≤ v < 5.10.2414.13 ≤ v < 5.15.1904.13 ≤ v < 5.4.2974.13 ≤ v < 6.1.1484.13 ≤ v < 6.12.424.13 ≤ v < 6.15.104.13 ≤ v < 6.16.14.13 ≤ v < 6.174.13 ≤ v < 6.6.1025.11 ≤ v < 5.15.1905.16 ≤ v < 6.1.1485.5 ≤ v < 5.10.2416.13 ≤ v < 6.15.106.16 ≤ v < 6.16.16.2 ≤ v < 6.6.1026.7 ≤ v < 6.12.423cdbe346ed3f380eae1cb3e9febfe703e7d8a7b04.13

Vendor states this is fixed in 181698af38d3f93381229ad89c09b5bd0496661a (fixed)

Vendor states this is fixed in 20c0ed8dd65834e6bab464f54cd6ff68659bacb9 (fixed)

Vendor states this is fixed in 2d4060f05e74dbee884ba723f6afd9282befc3c5 (fixed)

Vendor states this is fixed in 64ec9a7e7a6398b172ab6feba60e952163a1c3d5 (fixed)

Vendor states this is fixed in 6eadf50c1d894cb34f3237064063207460946040 (fixed)

Vendor states this is fixed in 9dea08eac4f6d6fbbae59992978252e2edab995d (fixed)

Vendor states this is fixed in a25ab6dfa0ce323ec308966988be6b675eb9d3e5 (fixed)

Vendor states this is fixed in ce63a83925964ab7564bd216bd92b80bc365492e (fixed)

Vendor states this is fixed in db111468531777cac8b4beb6515a88a54b0c4a74 (fixed)

Vendor states this is fixed in 4.13 (unaffected)

Vendor states this is fixed in 5.10.241 (unaffected)

Vendor states this is fixed in 5.15.190 (unaffected)