326 lines
16 KiB
JSON
326 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-49058",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-02-26T01:49:39.243Z",
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"datePublished": "2025-02-26T01:54:29.195Z",
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"dateUpdated": "2026-08-05T08:53:40.101Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:53:40.101Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: potential buffer overflow in handling symlinks\n\nSmatch printed a warning:\n\tarch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error:\n\t__memcpy() 'dctx->buf' too small (16 vs u32max)\n\nIt's caused because Smatch marks 'link_len' as untrusted since it comes\nfrom sscanf(). Add a check to ensure that 'link_len' is not larger than\nthe size of the 'link_str' buffer."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 9.1,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The attacker-controlled MF symlink payload is delivered over SMB as remote file contents and parsed in the CIFS client (query_mf_symlink/check_mf_symlink → parse_mf_symlink), so a malicious or compromised file server triggers the bug across the network.\nAC:L - A crafted 1067-byte MF symlink with an sscanf-derived link_len above 1024 (up to 9999 via %04u) deterministically drives crypto_shash_update/kstrndup past the in-buffer link_str; no race or layout luck is required.\nPR:N - The attacker only needs to operate or impersonate the SMB endpoint; no credentials or privileges on the victim client are required for the server to return the malicious object.\nUI:N - In the worst reasonable deployment (cifsroot defaults include mfsymlinks; fstab/autofs/container shares), ordinary client lookup/revalidate/get_link activity on an already-mounted share parses the planted object with no exploit-time victim action.\nS:U - The heap over-read and any resulting oops stay within the host kernel CIFS client authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - parse_mf_symlink feeds an attacker-chosen link_len into hashing/string duplication over link_str, over-reading up to ~9KB past the kmalloc object; that is a large OOB read and can surface heap bytes via kstrndup if the MD5 check is satisfied.\nI:N - The defect is an out-of-bounds read of server-supplied symlink bytes into MD5/kstrndup paths, not an out-of-bounds write or control-flow corruption primitive, matching other SMB client OOB-read symlink parses.\nA:H - Reading thousands of bytes past a 1067-byte allocation can fault unmapped heap and oops the kernel, and a malicious server can trigger the malformed object repeatedly on path access."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/cifs/link.c"
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],
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"versions": [
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "3e582749e742e662a8e9bb37cffac62dccaaa1e2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "1316c28569a80ab3596eeab05bf5e01991e7e739",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "eb5f51756944735ac70cd8bb38637cc202e29c91",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "22d658c6c5affed10c8907e67160cef0b6c92186",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "4e166a41180be2f1e66bbb6d46448e80a9a5ec05",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "9901b07ba42b39266b34a888e48d7306fd707bee",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "515e7ba11ef043d6febe69389949c8ef5f25e9d0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131",
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"lessThan": "64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/cifs/link.c"
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],
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"versions": [
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{
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"version": "2.6.37",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "2.6.37",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.9.311",
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"lessThanOrEqual": "4.9.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.14.276",
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"lessThanOrEqual": "4.14.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.19.239",
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"lessThanOrEqual": "4.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.4.190",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.112",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.35",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.17.4",
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"lessThanOrEqual": "5.17.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.18",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.37",
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"versionEndExcluding": "4.9.311"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "4.14.276"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "4.19.239"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "5.4.190"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.37",
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"versionEndExcluding": "5.17.4"
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{
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]
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/3e582749e742e662a8e9bb37cffac62dccaaa1e2"
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},
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{
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"url": "https://git.kernel.org/stable/c/1316c28569a80ab3596eeab05bf5e01991e7e739"
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},
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{
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"url": "https://git.kernel.org/stable/c/eb5f51756944735ac70cd8bb38637cc202e29c91"
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},
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{
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"url": "https://git.kernel.org/stable/c/22d658c6c5affed10c8907e67160cef0b6c92186"
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},
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{
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"url": "https://git.kernel.org/stable/c/4e166a41180be2f1e66bbb6d46448e80a9a5ec05"
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},
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{
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"url": "https://git.kernel.org/stable/c/9901b07ba42b39266b34a888e48d7306fd707bee"
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},
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{
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"url": "https://git.kernel.org/stable/c/515e7ba11ef043d6febe69389949c8ef5f25e9d0"
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},
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{
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"url": "https://git.kernel.org/stable/c/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304"
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}
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],
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"title": "cifs: potential buffer overflow in handling symlinks",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-49058",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-10-01T19:50:01.997451Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-120",
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"description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-10-01T19:57:06.701Z"
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}
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}
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]
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}
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} |