Answer in brief
CVE-2026-23399 records a Unknown severity vulnerability in nf_tables: nft_dynset: fix possible stateful expression memleak in error path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=563125a73ac30d7036ae69ca35c40500562c1de4 <eb7bf413e59945df03d4567b73ce464eebe2f4ea || >=563125a73ac30d7036ae69ca35c40500562c1de4 <4357dbb1d9c35ca0b4443d71c98a48e6666f7689 || >=563125a73ac30d7036ae69ca35c40500562c1de4 <e6661add2d9c6913e1dad97336595e23a2bed195 || >=563125a73ac30d7036ae69ca35c40500562c1de4 <d1354873cbe3b344899c4311ac05897fd83e3f21 || >=563125a73ac30d7036ae69ca35c40500562c1de4 <31641c682db73353e4647e40735c7f2a75ff58ef || >=563125a73ac30d7036ae69ca35c40500562c1de4 <c88a9fd26cee365bec932196f76175772a941cca || >=563125a73ac30d7036ae69ca35c40500562c1de4 <0548a13b5a145b16e4da0628b5936baf35f51b43 | eb7bf413e59945df03d4567b73ce464eebe2f4ea, 4357dbb1d9c35ca0b4443d71c98a48e6666f7689, e6661add2d9c6913e1dad97336595e23a2bed195, d1354873cbe3b344899c4311ac05897fd83e3f21, 31641c682db73353e4647e40735c7f2a75ff58ef, c88a9fd26cee365bec932196f76175772a941cca, 0548a13b5a145b16e4da0628b5936baf35f51b43 |
| Linux/Linuxgeneric | 5.11 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Mar 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 8, 2026
In the Linux kernel, the following vulnerability has been resolved: nf_tables: nft_dynset: fix possible stateful expression memleak in error path If cloning the second stateful expression in the element via GFP_ATOMIC fails, then the first stateful expression remains in place without being released. unreferenced object (percpu) 0x607b97e9cab8 (size 16): comm "softirq", pid 0, jiffies 4294931867 hex dump (first 16 bytes on cpu 3): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 backtrace (crc 0): pcpu_alloc_noprof+0x453/0xd80 nft_counter_clone+0x9c/0x190 [nf_tables] nft_expr_clone+0x8f/0x1b0 [nf_tables] nft_dynset_new+0x2cb/0x5f0 [nf_tables] nft_rhash_update+0x236/0x11c0 [nf_tables] nft_dynset_eval+0x11f/0x670 [nf_tables] nft_do_chain+0x253/0x1700 [nf_tables] nft_do_chain_ipv4+0x18d/0x270 [nf_tables] nf_hook_slow+0xaa/0x1e0 ip_local_deliver+0x209/0x330
Quoted source text, attributed separately from HOL analysis.