{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-39735", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-39735", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-04-18T07:01:36.453Z", "updatedAt": "2026-08-05T12:04:55.584Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "jfs: fix slab-out-of-bounds read in ea_get()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: fix slab-out-of-bounds read in ea_get()\n\nDuring the \"size_check\" label in ea_get(), the code checks if the extended\nattribute list (xattr) size matches ea_size. If not, it logs\n\"ea_get: invalid extended attribute\" and calls print_hex_dump().\n\nHere, EALIST_SIZE(ea_buf->xattr) returns 4110417968, which exceeds\nINT_MAX (2,147,483,647). Then ea_size is clamped:\n\n\tint size = clamp_t(int, ea_size, 0, EALIST_SIZE(ea_buf->xattr));\n\nAlthough clamp_t aims to bound ea_size between 0 and 4110417968, the upper\nlimit is treated as an int, causing an overflow above 2^31 - 1. This leads\n\"size\" to wrap around and become negative (-184549328).\n\nThe \"size\" is then passed to print_hex_dump() (called \"len\" in\nprint_hex_dump()), it is passed as type size_t (an unsigned\ntype), this is then stored inside a variable called\n\"int remaining\", which is then assigned to \"int linelen\" which\nis then passed to hex_dump_to_buffer(). In print_hex_dump()\nthe for loop, iterates through 0 to len-1, where len is\n18446744073525002176, calling hex_dump_to_buffer()\non each iteration:\n\n\tfor (i = 0; i < len; i += rowsize) {\n\t\tlinelen = min(remaining, rowsize);\n\t\tremaining -= rowsize;\n\n\t\thex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,\n\t\t\t\t linebuf, sizeof(linebuf), ascii);\n\n\t\t...\n\t}\n\nThe expected stopping condition (i < len) is effectively broken\nsince len is corrupted and very large. This eventually leads to\nthe \"ptr+i\" being passed to hex_dump_to_buffer() to get closer\nto the end of the actual bounds of \"ptr\", eventually an out of\nbounds access is done in hex_dump_to_buffer() in the following\nfor loop:\n\n\tfor (j = 0; j < len; j++) {\n\t\t\tif (linebuflen < lx + 2)\n\t\t\t\tgoto overflow2;\n\t\t\tch = ptr[j];\n\t\t...\n\t}\n\nTo fix this we should validate \"EALIST_SIZE(ea_buf->xattr)\"\nbefore it is utilised.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "6e39b681d1eb16f408493bf5023788b57f68998c", "status": "affected", "versionType": "git", "lessThan": "3d6fd5b9c6acbc005e53d0211c7381f566babec1" }, { "version": "bbf3f1fd8a0ac7df1db36a9b9e923041a14369f2", "status": "affected", "versionType": "git", "lessThan": "50afcee7011155933d8d5e8832f52eeee018cfd3" }, { "version": "27a93c45e16ac25a0e2b5e5668e2d1beca56a478", "status": "affected", "versionType": "git", "lessThan": "78c9cbde8880ec02d864c166bcb4fe989ce1d95f" }, { "version": "9c356fc32a4480a2c0e537a05f2a8617633ddad0", "status": "affected", "versionType": "git", "lessThan": "46e2c031aa59ea65128991cbca474bd5c0c2ecdb" }, { "version": "9353cdf28d4c5c0ff19c5df7fbf81ea774de43a4", "status": "affected", "versionType": "git", "lessThan": "a8c31808925b11393a6601f534bb63bac5366bab" }, { "version": "8c505ebeed8045b488b2e60b516c752b851f8437", "status": "affected", "versionType": "git", "lessThan": "0beddc2a3f9b9cf7d8887973041e36c2d0fa3652" }, { "version": "d9f9d96136cba8fedd647d2c024342ce090133c2", "status": "affected", "versionType": "git", "lessThan": "16d3d36436492aa248b2d8045e75585ebcc2f34d" }, { "version": "d9f9d96136cba8fedd647d2c024342ce090133c2", "status": "affected", "versionType": "git", "lessThan": "5263822558a8a7c0d0248d5679c2dcf4d5cda61f" }, { "version": "d9f9d96136cba8fedd647d2c024342ce090133c2", "status": "affected", "versionType": "git", "lessThan": "fdf480da5837c23b146c4743c18de97202fcab37" }, { "version": "4ea25fa8747fb8b1e5a11d87b852023ecf7ae420", "status": "affected", "versionType": "git" }, { "version": "676a787048aafd4d1b38a522b05a9cc77e1b0a33", "status": "affected", "versionType": "git" }, { "version": "5.4.287", "status": "affected", "versionType": "semver", "lessThan": "5.4.292" }, { "version": "5.10.231", "status": "affected", "versionType": "semver", "lessThan": "5.10.236" }, { "version": "5.15.174", "status": "affected", "versionType": "semver", "lessThan": "5.15.180" }, { "version": "6.1.120", "status": "affected", "versionType": "semver", "lessThan": "6.1.134" }, { "version": "6.6.64", "status": "affected", "versionType": "semver", "lessThan": "6.6.87" }, { "version": "6.12.2", "status": "affected", "versionType": "semver", "lessThan": "6.12.23" }, { "version": "4.19.325", "status": "affected", "versionType": "semver", "lessThan": "4.20" }, { "version": "6.11.11", "status": "affected", "versionType": "semver", "lessThan": "6.12" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.13" }, { "version": "5.4.292", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.236", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.180", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.134", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.87", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.23", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.13.*" }, { "version": "6.14.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.14.*" }, { "version": "6.15", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }