{"id":"CVE-2026-23044","state":"PUBLISHED","title":"PM: hibernate: Fix crash when freeing invalid crypto compressor","description":"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 ]","publishedAt":"2026-02-04T16:00:27.153Z","updatedAt":"2026-05-11T21:58:54.981Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab","status":"affected","lessThan":"b7a883b0135dbc6817e90a829421c9fc8cd94bad","versionType":"git"},{"version":"b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab","status":"affected","lessThan":"7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/power/swap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.6","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/power/swap.c"]}],"references":["https://git.kernel.org/stable/c/b7a883b0135dbc6817e90a829421c9fc8cd94bad","https://git.kernel.org/stable/c/7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23044.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23044","state":"PUBLISHED","datePublished":"2026-02-04T16:00:27.153Z","dateUpdated":"2026-05-11T21:58:54.981Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.944Z"},"containers":{"cna":{"title":"PM: hibernate: Fix crash when freeing invalid crypto compressor","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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab","status":"affected","lessThan":"b7a883b0135dbc6817e90a829421c9fc8cd94bad","versionType":"git"},{"version":"b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab","status":"affected","lessThan":"7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/power/swap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.6","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/power/swap.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b7a883b0135dbc6817e90a829421c9fc8cd94bad"},{"url":"https://git.kernel.org/stable/c/7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:58:54.981Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}