Memory Leak Affecting kernel-source package, versions <6.4.0-150600.23.65.1
Threat Intelligence
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Test your applications- Snyk IDSNYK-SLES156-KERNELSOURCE-12221237
- published28 Aug 2025
- disclosed27 Aug 2025
Introduced: 27 Aug 2025
CVE-2025-38300 (opens in a new tab)How to fix?
Upgrade SLES:15.6 kernel-source to version 6.4.0-150600.23.65.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-source package and not the kernel-source package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
crypto: sun8i-ce-cipher - fix error handling in sun8i_ce_cipher_prepare()
Fix two DMA cleanup issues on the error path in sun8i_ce_cipher_prepare():
1] If dma_map_sg() fails for areq->dst, the device driver would try to free DMA memory it has not allocated in the first place. To fix this, on the "theend_sgs" error path, call dma unmap only if the corresponding dma map was successful.
2] If the dma_map_single() call for the IV fails, the device driver would try to free an invalid DMA memory address on the "theend_iv" path: ------------[ cut here ]------------ DMA-API: sun8i-ce 1904000.crypto: device driver tries to free an invalid DMA memory address WARNING: CPU: 2 PID: 69 at kernel/dma/debug.c:968 check_unmap+0x123c/0x1b90 Modules linked in: skcipher_example(O+) CPU: 2 UID: 0 PID: 69 Comm: 1904000.crypto- Tainted: G O 6.15.0-rc3+ #24 PREEMPT Tainted: [O]=OOT_MODULE Hardware name: OrangePi Zero2 (DT) pc : check_unmap+0x123c/0x1b90 lr : check_unmap+0x123c/0x1b90 ... Call trace: check_unmap+0x123c/0x1b90 (P) debug_dma_unmap_page+0xac/0xc0 dma_unmap_page_attrs+0x1f4/0x5fc sun8i_ce_cipher_do_one+0x1bd4/0x1f40 crypto_pump_work+0x334/0x6e0 kthread_worker_fn+0x21c/0x438 kthread+0x374/0x664 ret_from_fork+0x10/0x20 ---[ end trace 0000000000000000 ]---
To fix this, check for !dma_mapping_error() before calling dma_unmap_single() on the "theend_iv" path.
References
- https://www.suse.com/security/cve/CVE-2025-38300.html
- https://bugzilla.suse.com/1246349
- https://git.kernel.org/stable/c/19d267d9fad00d94ad8477899e38ed7c11f33fb6
- https://git.kernel.org/stable/c/4051250e5db489f8ad65fc337e2677b9b568ac72
- https://git.kernel.org/stable/c/a0ac3f85b2e3ef529e852f252a70311f9029d5e6
- https://git.kernel.org/stable/c/c62b79c1c51303dbcb6edfa4de0ee176f4934c52
- https://git.kernel.org/stable/c/f31adc3e356f7350d4a4d68c98d3f60f2f6e26b3
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html