Answer in brief
CVE-2025-37749 records a Unknown severity 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.
Answer in brief
CVE-2025-37749 records a Unknown severity 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.
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). 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.
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). 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.