Description (CNA)
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]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 529401c8f12ecc35f9ea5d946d5a5596cf172b48; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before de5a4f0cba58625e88b7bebd88f780c8c0150997; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 99aa698dec342a07125d733e39aab4394b3b7e05; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b4c836d33ca888695b2f2665f948bc1b34fbd533; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1f6eb9fa87a781d5370c0de7794ae242f1a95ee5; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before aabc6596ffb377c4c9c8f335124b92ea282c9821 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.4.293 through 5.4.*; unaffected 5.10.237 through 5.10.*; unaffected 5.15.181 through 5.15.*; unaffected 6.1.135 through 6.1.*; unaffected 6.6.88 through 6.6.*; unaffected 6.12.24 through 6.12.*; unaffected 6.13.12 through 6.13.*; unaffected 6.14.3 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/529401c8f12ecc35f9ea5d946d5a5596cf172b48
- https://git.kernel.org/stable/c/de5a4f0cba58625e88b7bebd88f780c8c0150997
- https://git.kernel.org/stable/c/99aa698dec342a07125d733e39aab4394b3b7e05
- https://git.kernel.org/stable/c/b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca
- https://git.kernel.org/stable/c/fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8
- https://git.kernel.org/stable/c/b4c836d33ca888695b2f2665f948bc1b34fbd533
- https://git.kernel.org/stable/c/1f6eb9fa87a781d5370c0de7794ae242f1a95ee5
- https://git.kernel.org/stable/c/6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e
- https://git.kernel.org/stable/c/aabc6596ffb377c4c9c8f335124b92ea282c9821
ADP enrichment
No English description supplied.