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In the Linux kernel, the following vulnerability has been resolved:
PM: hibernate: Fix crash when freeing invalid crypto compressor
When crypto_alloc_acomp() fails, it returns an ERR_PTR value, not NULL.
The cleanup code in save_compressed_image() and load_compressed_image() unconditionally calls crypto_free_acomp() without checking for ERR_PTR, which causes crypto_acomp_tfm() to dereference an invalid pointer and crash the kernel.
This can be triggered when the compression algorithm is unavailable (e.g., CONFIG_CRYPTO_LZO not enabled).
Fix by adding IS_ERR_OR_NULL() checks before calling crypto_free_acomp() and acomp_request_free(), similar to the existing kthread_stop() check.
[ rjw: Added 2 empty code lines ]
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Feb 4, 2026 |
| Ubuntu | — | Upgrade linux-image-6.17.0-1031-nvidiaUpgrade linux-image-gcp-6.17Upgrade linux-image-6.17.0-1021-gcpUpgrade linux-image-6.17.0-1021-gcp-64kUpgrade linux-image-azure-6.17Upgrade linux-image-gcp-64kUpgrade linux-image-6.17.0-1021-azureUpgrade linux-image-azureUpgrade linux-image-oem-24.04cUpgrade linux-image-nvidia-64k-6.17Upgrade linux-image-azure-fdeUpgrade linux-image-oem-6.17Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-gcp-64k-6.17Upgrade linux-image-oracle-6.17Upgrade linux-image-6.17.0-1031-nvidia-64kUpgrade linux-image-oracleUpgrade linux-image-azure-fde-6.17Upgrade linux-image-realtime-6.17Upgrade linux-image-oem-24.04dUpgrade linux-image-6.17.0-1019-oracle-64kUpgrade linux-image-6.17.0-1018-realtimeUpgrade linux-image-nvidia-64k-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-6.17.0-1030-oemUpgrade linux-image-6.17.0-1018-azure-fdeUpgrade linux-image-6.17.0-1019-oracleUpgrade linux-image-oem-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-nvidia-6.17Upgrade linux-image-oem-24.04bUpgrade linux-image-oracle-64kUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-nvidia-hwe-24.04 | Jul 21, 2026 | Jul 20, 2026 |
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