CVE-2026-23044 (GCVE-0-2026-23044)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-02-09 08:37
VLAI?
Title
PM: hibernate: Fix crash when freeing invalid crypto compressor
Summary
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 ]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab , < b7a883b0135dbc6817e90a829421c9fc8cd94bad (git)
Affected: b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab , < 7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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    "dateReserved": "2026-01-13T15:37:45.944Z",
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