Answer in brief
CVE-2025-37749 records a High severity (CVSS 8.2) vulnerability in net: ppp: Add bound checking for skb data on ppp_sync_txmung. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.2. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <529401c8f12ecc35f9ea5d946d5a5596cf172b48 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de5a4f0cba58625e88b7bebd88f780c8c0150997 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <99aa698dec342a07125d733e39aab4394b3b7e05 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b4c836d33ca888695b2f2665f948bc1b34fbd533 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1f6eb9fa87a781d5370c0de7794ae242f1a95ee5 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aabc6596ffb377c4c9c8f335124b92ea282c9821 | 529401c8f12ecc35f9ea5d946d5a5596cf172b48, de5a4f0cba58625e88b7bebd88f780c8c0150997, 99aa698dec342a07125d733e39aab4394b3b7e05, b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca, fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8, b4c836d33ca888695b2f2665f948bc1b34fbd533, 1f6eb9fa87a781d5370c0de7794ae242f1a95ee5, 6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e, aabc6596ffb377c4c9c8f335124b92ea282c9821 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
May 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: net: ppp: Add bound checking for skb data on ppp_sync_txmung Ensure we have enough data in linear buffer from skb before accessing initial bytes. This prevents potential out-of-bounds accesses when processing short packets. When ppp_sync_txmung receives an incoming package with an empty payload: (remote) gef➤ p *(struct pppoe_hdr *) (skb->head + skb->network_header) $18 = { type = 0x1, ver = 0x1, code = 0x0, sid = 0x2, length = 0x0, tag = 0xffff8880371cdb96 } from the skb struct (trimmed) tail = 0x16, end = 0x140, head = 0xffff88803346f400 "4", data = 0xffff88803346f416 ":\377", truesize = 0x380, len = 0x0, data_len = 0x0, mac_len = 0xe, hdr_len = 0x0, it is not safe to access data[2]. [[email protected]: fixed subj typo]
Quoted source text, attributed separately from HOL analysis.