{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23044","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.944Z","datePublished":"2026-02-04T16:00:27.153Z","dateUpdated":"2026-05-11T21:58:54.981Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:58:54.981Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nPM: hibernate: Fix crash when freeing invalid crypto compressor\n\nWhen crypto_alloc_acomp() fails, it returns an ERR_PTR value, not NULL.\n\nThe cleanup code in save_compressed_image() and load_compressed_image()\nunconditionally calls crypto_free_acomp() without checking for ERR_PTR,\nwhich causes crypto_acomp_tfm() to dereference an invalid pointer and\ncrash the kernel.\n\nThis can be triggered when the compression algorithm is unavailable\n(e.g., CONFIG_CRYPTO_LZO not enabled).\n\nFix by adding IS_ERR_OR_NULL() checks before calling crypto_free_acomp()\nand acomp_request_free(), similar to the existing kthread_stop() check.\n\n[ rjw: Added 2 empty code lines ]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/power/swap.c"],"versions":[{"version":"b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab","lessThan":"b7a883b0135dbc6817e90a829421c9fc8cd94bad","status":"affected","versionType":"git"},{"version":"b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab","lessThan":"7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/power/swap.c"],"versions":[{"version":"6.15","status":"affected"},{"version":"0","lessThan":"6.15","status":"unaffected","versionType":"semver"},{"version":"6.18.6","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b7a883b0135dbc6817e90a829421c9fc8cd94bad"},{"url":"https://git.kernel.org/stable/c/7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77"}],"title":"PM: hibernate: Fix crash when freeing invalid crypto compressor","x_generator":{"engine":"bippy-1.2.0"}}}}