{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64550", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.796Z", "datePublished": "2026-07-27T20:10:39.459Z", "dateUpdated": "2026-07-27T20:10:39.459Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-27T20:10:39.459Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: validate MAP frame length before ingress parsing\n\nWhen ingress deaggregation is disabled, rmnet_map_ingress_handler() passes\nthe skb straight to __rmnet_map_ingress_handler(), skipping the length\nvalidation that rmnet_map_deaggregate() performs on the aggregated path.\nThe parser then dereferences the MAP header and csum header/trailer based on\nthe on-wire pkt_len without checking skb->len, so a short frame is read out\nof bounds:\n\n BUG: KASAN: slab-out-of-bounds in rmnet_map_checksum_downlink_packet\n Read of size 1 at addr ffff88801118ed00 by task exploit/147\n Call Trace:\n ...\n rmnet_map_checksum_downlink_packet (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:413)\n __rmnet_map_ingress_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:96)\n rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:129)\n __netif_receive_skb_core.constprop.0 (net/core/dev.c:6089)\n netif_receive_skb (net/core/dev.c:6460)\n tun_get_user (drivers/net/tun.c:1955)\n tun_chr_write_iter (drivers/net/tun.c:2001)\n vfs_write (fs/read_write.c:688)\n ksys_write (fs/read_write.c:740)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n ...\n\nFactor that validation out of rmnet_map_deaggregate() into\nrmnet_map_validate_packet_len() and run it on the no-aggregation path too.\nThe MAP header is bounds-checked first, since this path can receive a frame\nshorter than the header."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c", "drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h", "drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c"], "versions": [{"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "ed25befc8c36f896b5878f9078faddb67fd7e2d0", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "a54d76d176e50d2fdbd39b7231efe256170339e4", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "00f4c366dbca16a40772c3b7ec2d8cba839e9724", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "3868c3244369ab709a90c9aad7534d406009b824", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "14eb0c9491385d5361a292ea4974aec0e6887299", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "1b12612c367e4be9b0814c0468e7e687835315b4", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "231a8a4b76cb1b1827b3b19d7b3603642f5aaaef", "status": "affected", "versionType": "git"}, {"version": "ceed73a2cf4aff2921802aa3d21d45280677547d", "lessThan": "f0f1887a9e30712a1df03e152dce6fb91344b1f3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c", "drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h", "drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc3", "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": "4.14", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.2-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ed25befc8c36f896b5878f9078faddb67fd7e2d0"}, {"url": "https://git.kernel.org/stable/c/a54d76d176e50d2fdbd39b7231efe256170339e4"}, {"url": "https://git.kernel.org/stable/c/00f4c366dbca16a40772c3b7ec2d8cba839e9724"}, {"url": "https://git.kernel.org/stable/c/3868c3244369ab709a90c9aad7534d406009b824"}, {"url": "https://git.kernel.org/stable/c/14eb0c9491385d5361a292ea4974aec0e6887299"}, {"url": "https://git.kernel.org/stable/c/1b12612c367e4be9b0814c0468e7e687835315b4"}, {"url": "https://git.kernel.org/stable/c/231a8a4b76cb1b1827b3b19d7b3603642f5aaaef"}, {"url": "https://git.kernel.org/stable/c/f0f1887a9e30712a1df03e152dce6fb91344b1f3"}], "title": "net: qualcomm: rmnet: validate MAP frame length before ingress parsing", "x_generator": {"engine": "bippy-1.2.0"}}}}

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