{"id":"CVE-2026-72014","summary":"drbd: reject data replies with an out-of-range payload size","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrbd: reject data replies with an out-of-range payload size\n\nrecv_dless_read() receives a P_DATA_REPLY from a peer into the bio of an\noutstanding read request. The peer-supplied payload length reaches it as\nthe signed int data_size, and two peer-controlled inputs can make it\nnegative. With a negotiated data-integrity-alg the digest length is\nsubtracted first, so a reply whose payload is smaller than the digest\nunderflows data_size. With no integrity algorithm (the default) data_size\nis assigned from the unsigned h95/h100 wire length and drbdd() never\nbounds it for a payload-carrying command, so a length above INT_MAX casts\nit negative; this path needs no non-default feature. The bio receive loop\nthen computes expect = min_t(int, data_size, bv_len), which is negative,\nand drbd_recv_all_warn(mapped, expect) receives with a size_t of SIZE_MAX\ninto the first mapped page.\n\nThe sibling receive path read_in_block() is not affected: it uses an\nunsigned size and rejects it against DRBD_MAX_BIO_SIZE before receiving.\nReject a data reply whose size is negative after the optional digest\nsubtraction, covering both triggers.\n\nImpact: a malicious or man-in-the-middle DRBD peer copies attacker-chosen\nbytes past a bio page in the receiver, corrupting kernel memory. A node\nthat reads from its peer (a diskless node, or read-balancing to the peer)\nis exposed in the default configuration; data-integrity-alg is not\nrequired.","modified":"2026-08-18T03:56:17.901550154Z","published":"2026-08-15T05:51:42.741Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72014.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/38cc4867540ae8beedfe41a1a1a6ed37052c77d6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5f59a8142000f0b8f75c432209ead73c424a745d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99"},{"type":"WEB","url":"https://git.kernel.org/stable/c/741a682535deffe9ab7e5c89caf83571efbc9dd9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bca33f5442c3094511719d9db792ce3165d87e76"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd910a7660d280595ef94cb6d193951d855d330f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f14e87d7b166490bceb9603b39310e51595d05b9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f16866c62656865854106b79bcf6e4ca97a51a92"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72014.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72014"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b411b3637fa71fce9cf2acf0639009500f5892fe"},{"fixed":"bca33f5442c3094511719d9db792ce3165d87e76"},{"fixed":"741a682535deffe9ab7e5c89caf83571efbc9dd9"},{"fixed":"f14e87d7b166490bceb9603b39310e51595d05b9"},{"fixed":"f16866c62656865854106b79bcf6e4ca97a51a92"},{"fixed":"5f59a8142000f0b8f75c432209ead73c424a745d"},{"fixed":"38cc4867540ae8beedfe41a1a1a6ed37052c77d6"},{"fixed":"648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99"},{"fixed":"bd910a7660d280595ef94cb6d193951d855d330f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72014.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.33"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72014.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}