{"id":"CVE-2026-53185","revision":"0e33ed28c8f3468bae41fb9203644a4c","records":[{"revision":"0e33ed28c8f3468bae41fb9203644a4c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53185","aliases":[],"title":"zram: fix use-after-free in zram_bvec_write_partial()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix use-after-free in zram_bvec_write_partial()\n\nzram_read_page() picks the sync or async backing device read path based on\nwhether the parent bio is NULL.  zram_bvec_write_partial() passes its\nparent bio down, so for ZRAM_WB slots the read is dispatched\nasynchronously and zram_read_page() returns 0 while the bio is still in\nflight.  The caller then runs memcpy_from_bvec(), zram_write_page() and\n__free_page() on the buffer, leaving the async read to write into a freed\npage.\n\nzram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d\n(\"zram: fix synchronous reads\") for the same reason; the write_partial\ncounterpart was missed.","state":0,"publishedAt":"2026-06-25T08:38:58.853+00:00","modifiedAt":"2026-10-19T19:57:26.863+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/zram/zram_drv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8e654f8fbff52ac483fb69957222853d7e2fc588\",\n                            \"lessThan\": \"0c2821665ff71be3f4b07ecece384669f2877f6a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e654f8fbff52ac483fb69957222853d7e2fc588\",\n                            \"lessThan\": \"77a602b505ce4802915853cfc435a4722fab3e64\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e654f8fbff52ac483fb69957222853d7e2fc588\",\n                            \"lessThan\": \"c96786d6ff1acc1d54d9241e97767554c1dfdd5b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e654f8fbff52ac483fb69957222853d7e2fc588\",\n                            \"lessThan\": \"198b5a14cca27263b9c14b20114c8092de15dfcb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e654f8fbff52ac483fb69957222853d7e2fc588\",\n                            \"lessThan\": \"732fd9f0b9c1cdc6dfd77162ded60df005182cc0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/zram/zram_drv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.143\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.94\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.36\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.13\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0c2821665ff71be3f4b07ecece384669f2877f6a","https://git.kernel.org/stable/c/77a602b505ce4802915853cfc435a4722fab3e64","https://git.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554c1dfdd5b","https://git.kernel.org/stable/c/198b5a14cca27263b9c14b20114c8092de15dfcb","https://git.kernel.org/stable/c/732fd9f0b9c1cdc6dfd77162ded60df005182cc0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53185","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53185","identifiers":["CVE-2026-53185"]},"retained":false,"historicalAffected":[]}],"coverage":[]}