CVE-2025-37749

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Source
https://cve.org/CVERecord?id=CVE-2025-37749
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37749.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-37749
Downstream
Related
Published
2025-05-01T12:55:55.316Z
Modified
2026-05-07T04:15:40.085328Z
Summary
net: ppp: Add bound checking for skb data on ppp_sync_txmung
Details

In the Linux kernel, the following vulnerability has been resolved:

net: ppp: Add bound checking for skb data on pppsynctxmung

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 pppsynctxmung receives an incoming package with an empty payload: (remote) gef➤ p *(struct pppoehdr *) (skb->head + skb->networkheader) $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, datalen = 0x0, maclen = 0xe, hdr_len = 0x0,

it is not safe to access data[2].

[pabeni@redhat.com: fixed subj typo]

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37749.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed
529401c8f12ecc35f9ea5d946d5a5596cf172b48
Fixed
de5a4f0cba58625e88b7bebd88f780c8c0150997
Fixed
99aa698dec342a07125d733e39aab4394b3b7e05
Fixed
b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca
Fixed
fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8
Fixed
b4c836d33ca888695b2f2665f948bc1b34fbd533
Fixed
1f6eb9fa87a781d5370c0de7794ae242f1a95ee5
Fixed
6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e
Fixed
aabc6596ffb377c4c9c8f335124b92ea282c9821

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37749.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.12
Fixed
5.4.293
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.237
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.181
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.135
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.88
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.24
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.12
Type
ECOSYSTEM
Events
Introduced
6.14.0
Fixed
6.14.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37749.json"