جزئیات آسیبپذیری
CVE-2026-31402
Linux LinuxRed Hat Enterprise Linux 9Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFPSiemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPSiemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
nfsd: fix heap overflow in NFSv4.0 LOCK replay cache
CVSS 3.1
9.8بحرانی
شرح رسمی (انگلیسی)
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache The NFSv4.0 replay cache uses a fixed 112-byte inline buffer (rp_ibuf[NFSD4_REPLAY_ISIZE]) to store encoded operation responses. This size was calculated based on OPEN responses and does not account for LOCK denied responses, which include the conflicting lock owner as a variable-length field up to 1024 bytes (NFS4_OPAQUE_LIMIT). When a LOCK operation is denied due to a conflict with an existing lock that has a large owner, nfsd4_encode_operation() copies the full encoded response into the undersized replay buffer via read_bytes_from_xdr_buf() with no bounds check. This results in a slab-out-of-bounds write of up to 944 bytes past the end of the buffer, corrupting adjacent heap memory. This can be triggered remotely by an unauthenticated attacker with two cooperating NFSv4.0 clients: one sets a lock with a large owner string, then the other requests a conflicting lock to provoke the denial. We could fix this by increasing NFSD4_REPLAY_ISIZE to allow for a full opaque, but that would increase the size of every stateowner, when most lockowners are not that large. Instead, fix this by checking the encoded response length against NFSD4_REPLAY_ISIZE before copying into the replay buffer. If the response is too large, set rp_buflen to 0 to skip caching the replay payload. The status is still cached, and the client already received the correct response on the original request.
امتیازهای CVSS
| امتیاز | نسخه | منبع | بردار |
|---|---|---|---|
| 9.8بحرانی | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 7.8بالا | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
محصولات آسیبپذیر
| فروشنده | محصول | نسخهها | منبع |
|---|---|---|---|
| Linux | Linux | 2.6.12 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 2665887a69437a8a4f552f69509eecfb73d4aa19 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < c9452c0797c95cf2378170df96cf4f4b3bca7eff | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 8afb437ea1f70cacb4bbdf11771fb5c4d720b965 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < dad0c3c0a8e5d1d6eb0fc455694ce3e25e6c57d0 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 0f0e2a54a31a7f9ad2915db99156114872317388 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < ae8498337dfdfda71bdd0b807c9a23a126011d76 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 5133b61aaf437e5f25b1b396b14242a6bb0508e2 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < f9fcb4441f6c02bb20c2eb340101e27dfe23607c | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Enterprise Linux 9 | همه | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.6 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.6 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.7 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.7 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.5 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.5 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.6 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.6 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.7 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.7 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | V3.1.6 ≤ v | CVEProject cvelistV5 (CNA) |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | V3.1.7 ≤ v | CVEProject cvelistV5 (CNA) |
منابع و راهنماها
۳۸- https://git.kernel.org/stable/c/f9fcb4441f6c02bb20c2eb340101e27dfe23607c
- https://git.kernel.org/stable/c/2665887a69437a8a4f552f69509eecfb73d4aa19
- https://git.kernel.org/stable/c/c9452c0797c95cf2378170df96cf4f4b3bca7eff
- https://git.kernel.org/stable/c/8afb437ea1f70cacb4bbdf11771fb5c4d720b965
- https://git.kernel.org/stable/c/dad0c3c0a8e5d1d6eb0fc455694ce3e25e6c57d0
- https://git.kernel.org/stable/c/0f0e2a54a31a7f9ad2915db99156114872317388
- https://git.kernel.org/stable/c/ae8498337dfdfda71bdd0b807c9a23a126011d76
- https://git.kernel.org/stable/c/5133b61aaf437e5f25b1b396b14242a6bb0508e2
- https://access.redhat.com/security/cve/CVE-2026-31402 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2454844 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31402.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:14823 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:14925 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:14869 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:15883 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13566 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:19569 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13936 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13734 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:10108 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:11313 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13565 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:19568 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13577 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:36530 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:14165 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13664 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13681 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:36531 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:36532 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:36533 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:36534 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13578 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:14137 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:14301 vendor-advisoryx_refsource_REDHAT
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
کانال تلگرام کُلون @kolunsec_fa
تازههای KEV، خبرهای مهم و خلاصهی روزانه
هشدار CVEهای بعدی این محصولمحصول را دنبال کنید تا آسیبپذیریهای تازه را در تلگرام بگیرید.
اطلاعات
- تاریخ انتشار
- ۱۴۰۵/۰۱/۱۴
- آخرین بهروزرسانی
- ۱۴۰۵/۰۷/۲۷
- وضعیت
- منتشرشده
- صادرکننده (CNA)
- Linux
پیشبینی بهرهبرداری (EPSS)
۱٫۲۱٪
احتمال بهرهبرداری در ۳۰ روز
۶۸٫۸٪
صدک (نسبت به همهی CVEها)
ارزیابی SSVC (CISA)
- قابل خودکارسازی
- بله
- وضعیت بهرهبرداری
- ندارد
- اثر فنی
- کامل
ضعفها (CWE)
- CWE-787Out-of-bounds Write
- CWE-122Heap-based Buffer Overflow