Answer in brief
CVE-2025-38465 records a Unknown severity vulnerability in netlink: Fix wraparounds of sk->sk_rmem_alloc.. 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.
Answer in brief
CVE-2025-38465 records a Unknown severity vulnerability in netlink: Fix wraparounds of sk->sk_rmem_alloc.. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9da025150b7c14a8390fc06aea314c0a4011e82c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd69af06101090eaa60b3d216ae715f9c0a58e5b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <76602d8e13864524382b0687dc32cd8f19164d5a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55baecb9eb90238f60a8350660d6762046ebd3bd || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4b8e18af7bea92f8b7fb92d40aeae729209db250 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cd7ff61bfffd7000143c42bbffb85eeb792466d6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc | 9da025150b7c14a8390fc06aea314c0a4011e82c, c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98, fd69af06101090eaa60b3d216ae715f9c0a58e5b, 76602d8e13864524382b0687dc32cd8f19164d5a, 55baecb9eb90238f60a8350660d6762046ebd3bd, 4b8e18af7bea92f8b7fb92d40aeae729209db250, cd7ff61bfffd7000143c42bbffb85eeb792466d6, ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jul 25, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
In the Linux kernel, the following vulnerability has been resolved: netlink: Fix wraparounds of sk->sk_rmem_alloc. Netlink has this pattern in some places if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf) atomic_add(skb->truesize, &sk->sk_rmem_alloc); , which has the same problem fixed by commit 5a465a0da13e ("udp: Fix multiple wraparounds of sk->sk_rmem_alloc."). For example, if we set INT_MAX to SO_RCVBUFFORCE, the condition is always false as the two operands are of int. Then, a single socket can eat as many skb as possible until OOM happens, and we can see multiple wraparounds of sk->sk_rmem_alloc. Let's fix it by using atomic_add_return() and comparing the two variables as unsigned int. Before: [root@fedora ~]# ss -f netlink Recv-Q Send-Q Local Address:Port Peer Address:Port -1668710080 0 rtnl:nl_wraparound/293 * After: [root@fedora ~]# ss -f netlink Recv-Q Send-Q Local Address:Port Peer Address:Port 2147483072 0 rtnl:nl_wraparound/290 * ^ `--- INT_MAX - 576
Quoted source text, attributed separately from HOL analysis.
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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9da025150b7c14a8390fc06aea314c0a4011e82c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd69af06101090eaa60b3d216ae715f9c0a58e5b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <76602d8e13864524382b0687dc32cd8f19164d5a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55baecb9eb90238f60a8350660d6762046ebd3bd || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4b8e18af7bea92f8b7fb92d40aeae729209db250 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cd7ff61bfffd7000143c42bbffb85eeb792466d6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc | 9da025150b7c14a8390fc06aea314c0a4011e82c, c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98, fd69af06101090eaa60b3d216ae715f9c0a58e5b, 76602d8e13864524382b0687dc32cd8f19164d5a, 55baecb9eb90238f60a8350660d6762046ebd3bd, 4b8e18af7bea92f8b7fb92d40aeae729209db250, cd7ff61bfffd7000143c42bbffb85eeb792466d6, ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jul 25, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
In the Linux kernel, the following vulnerability has been resolved: netlink: Fix wraparounds of sk->sk_rmem_alloc. Netlink has this pattern in some places if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf) atomic_add(skb->truesize, &sk->sk_rmem_alloc); , which has the same problem fixed by commit 5a465a0da13e ("udp: Fix multiple wraparounds of sk->sk_rmem_alloc."). For example, if we set INT_MAX to SO_RCVBUFFORCE, the condition is always false as the two operands are of int. Then, a single socket can eat as many skb as possible until OOM happens, and we can see multiple wraparounds of sk->sk_rmem_alloc. Let's fix it by using atomic_add_return() and comparing the two variables as unsigned int. Before: [root@fedora ~]# ss -f netlink Recv-Q Send-Q Local Address:Port Peer Address:Port -1668710080 0 rtnl:nl_wraparound/293 * After: [root@fedora ~]# ss -f netlink Recv-Q Send-Q Local Address:Port Peer Address:Port 2147483072 0 rtnl:nl_wraparound/290 * ^ `--- INT_MAX - 576
Quoted source text, attributed separately from HOL analysis.