{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49275", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.298Z", "datePublished": "2025-02-26T01:56:20.066Z", "dateUpdated": "2026-08-05T08:54:32.809Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:32.809Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: m_can: m_can_tx_handler(): fix use after free of skb\n\ncan_put_echo_skb() will clone skb then free the skb. Move the\ncan_put_echo_skb() for the m_can version 3.0.x directly before the\nstart of the xmit in hardware, similar to the 3.1.x branch." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The UAF is in m_can_tx_handler on the ndo_start_xmit/TX work path, reached when a local process sends via AF_CAN (raw_sendmsg → can_send → m_can_start_xmit), not when processing frames received from the CAN bus. Same TX-local scoring as other SocketCAN transmit bugs rather than adjacent bus RX.\nAC:L - On M_CAN IP v3.0.x with CAN_CTRLMODE_FD enabled, every transmit deterministically calls can_put_echo_skb() (which frees the skb) and then can_is_canfd_skb(skb)/cf->flags on the freed pointer; the attacker fully controls when frames are sent and no race is required.\nPR:L - socket(PF_CAN)/bind/sendmsg impose no capability checks, so an unprivileged local user can trigger the path on an already-up m_can interface typical of automotive/industrial deployments; CAP_NET_ADMIN is only needed for bring-up/bitrate, not for TX.\nUI:N - The attacker triggers the UAF solely by sending crafted/ordinary CAN frames on the interface; no separate victim action such as mounting a device or opening a file is required.\nS:U - Impact is use-after-free of a kernel sk_buff within the host SocketCAN/m_can driver under the same OS authority, enabling standard local privilege escalation rather than a VM/IOMMU/sandbox escape.\nC:H - can_put_echo_skb()/can_create_echo_skb() frees the original sk_buff while the TX path still reads skb->len and skb->data; reclaiming that slab object yields a classic UAF read/disclosure primitive scored Confidentiality High.\nI:H - The same sk_buff UAF is heap memory corruption that enables spraying and write/control-flow primitives typical of exploitable kernel use-after-frees, so Integrity is High per UAF guidance even though the immediate post-free accesses are reads.\nA:H - Dereferencing the freed sk_buff in the TX path can oops/panic the kernel (and UAF bugs are scored Availability High even when not fully exploited), fully denying host availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/can/m_can/m_can.c" ], "versions": [ { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "d93ed9aff64968f4cdad690712eb4f48ae537bde", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "d3892a747ab16b1eb6593a19d29f62c3b3f020ac", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "7728d937ec403a1ceff9483023252d2cb8777f81", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "08d90846e438ac22dc56fc49ec0b0d195831c5ed", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "869016a2938ac44f7b2fb7fc22c89edad99eb9b3", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "f43e64076ff1b1dcb893fb77ad1204105f710a29", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "4db7d6f481990dd179a9ee7126dc7aa31ea4fff3", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "31417073493f302d26ab66b3abc098d43227b835", "status": "affected", "versionType": "git" }, { "version": "80646733f11c2e9de3b6339f7e635047e6087280", "lessThan": "2e8e79c416aae1de224c0f1860f2e3350fa171f8", "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/can/m_can/m_can.c" ], "versions": [ { "version": "3.18", "status": "affected" }, { "version": "0", "lessThan": "3.18", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.324", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.289", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.253", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.207", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.110", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.33", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.19", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.2", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "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": "3.18", "versionEndExcluding": "4.9.324" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "4.14.289" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "4.19.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.4.207" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.10.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.15.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.16.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.17.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d93ed9aff64968f4cdad690712eb4f48ae537bde" }, { "url": "https://git.kernel.org/stable/c/d3892a747ab16b1eb6593a19d29f62c3b3f020ac" }, { "url": "https://git.kernel.org/stable/c/7728d937ec403a1ceff9483023252d2cb8777f81" }, { "url": "https://git.kernel.org/stable/c/08d90846e438ac22dc56fc49ec0b0d195831c5ed" }, { "url": "https://git.kernel.org/stable/c/869016a2938ac44f7b2fb7fc22c89edad99eb9b3" }, { "url": "https://git.kernel.org/stable/c/f43e64076ff1b1dcb893fb77ad1204105f710a29" }, { "url": "https://git.kernel.org/stable/c/4db7d6f481990dd179a9ee7126dc7aa31ea4fff3" }, { "url": "https://git.kernel.org/stable/c/31417073493f302d26ab66b3abc098d43227b835" }, { "url": "https://git.kernel.org/stable/c/2e8e79c416aae1de224c0f1860f2e3350fa171f8" } ], "title": "can: m_can: m_can_tx_handler(): fix use after free of skb", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49275", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-03-04T18:03:19.289491Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-03-04T18:07:17.587Z" } } ] } }