CVE - CVE-2025-37749

CVE-ID
CVE-2025-37749	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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]. [pabeni@redhat.com: fixed subj typo]
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1f6eb9fa87a781d5370c0de7794ae242f1a95ee5 URL:https://git.kernel.org/stable/c/1f6eb9fa87a781d5370c0de7794ae242f1a95ee5 MISC:https://git.kernel.org/stable/c/529401c8f12ecc35f9ea5d946d5a5596cf172b48 URL:https://git.kernel.org/stable/c/529401c8f12ecc35f9ea5d946d5a5596cf172b48 MISC:https://git.kernel.org/stable/c/6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e URL:https://git.kernel.org/stable/c/6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e MISC:https://git.kernel.org/stable/c/99aa698dec342a07125d733e39aab4394b3b7e05 URL:https://git.kernel.org/stable/c/99aa698dec342a07125d733e39aab4394b3b7e05 MISC:https://git.kernel.org/stable/c/aabc6596ffb377c4c9c8f335124b92ea282c9821 URL:https://git.kernel.org/stable/c/aabc6596ffb377c4c9c8f335124b92ea282c9821 MISC:https://git.kernel.org/stable/c/b4c836d33ca888695b2f2665f948bc1b34fbd533 URL:https://git.kernel.org/stable/c/b4c836d33ca888695b2f2665f948bc1b34fbd533 MISC:https://git.kernel.org/stable/c/b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca URL:https://git.kernel.org/stable/c/b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca MISC:https://git.kernel.org/stable/c/de5a4f0cba58625e88b7bebd88f780c8c0150997 URL:https://git.kernel.org/stable/c/de5a4f0cba58625e88b7bebd88f780c8c0150997 MISC:https://git.kernel.org/stable/c/fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8 URL:https://git.kernel.org/stable/c/fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8
Assigning CNA
kernel.org
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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