CVE-2026-97964
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ppp_synctty: ensure a writeable skb header
In the Linux kernel, the following vulnerability has been resolved: ppp_synctty: ensure a writeable skb header ppp_sync_txmunge() checks headroom before prepending the address and control bytes, but does not ensure that the skb header is writable. A received skb can reach this function through PPP channel bridging without passing through ppp_start_xmit(), which calls skb_cow_head(). For example, a PPPoE frame may share its buffer with a clone queued to an AF_PACKET socket. If it is bridged to a synchronous tty channel, the address/control bytes can overwrite data still visible to that socket. Use skb_cow_head() to ensure both sufficient headroom and a writable header.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4cf476ced45d7f12df30a68e833b263e7a2202d1 | affected | git | 25e03eeead2c49748c7582dfb64c205f93a42d00 | Unavailable | None listed |
| 4cf476ced45d7f12df30a68e833b263e7a2202d1 | affected | git | a256f9925288ef47de8febed5c38d5cc21340211 | Unavailable | None listed |
| 4cf476ced45d7f12df30a68e833b263e7a2202d1 | affected | git | 7953946f68262a8bb137aa101249adef6e029652 | Unavailable | None listed |
| 4cf476ced45d7f12df30a68e833b263e7a2202d1 | affected | git | 3af7797fbabc84992e0ca5ad2bc0ca8537d053ef | Unavailable | None listed |
| 4cf476ced45d7f12df30a68e833b263e7a2202d1 | affected | git | 0996c3e6bcc6ae08cb371ed43648c9f7f748ae6e | Unavailable | None listed |
| 4cf476ced45d7f12df30a68e833b263e7a2202d1 | affected | git | 15d0a6c9a42df2d745c37510dba828f6dbe60d9f | Unavailable | None listed |
| 4cf476ced45d7f12df30a68e833b263e7a2202d1 | affected | git | 8aaeb56aff2a557a88f83ae866da2c91ad247e59 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.11 | Unavailable | None listed |
| 5.15.222 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.111 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.53 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.7 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |