CVE-2026-63994
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)
tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()
In the Linux kernel, the following vulnerability has been resolved: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() Sashiko found that iptunnel_pmtud_build_icmp() and iptunnel_pmtud_build_icmpv6() were caching ip_hdr() and ipv6_hdr() before an skb_cow() call which can reallocate skb->head. Fix this possible UAF by initializing the local variables after the skb_cow() call. Remove skb_reset_network_header() calls which were not needed.
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) |
|---|---|---|---|---|---|
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | 95b6d772bfe788331d9742d73eaa12e113b2adc4 | Unavailable | None listed |
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | 7254aef4d1a7e18e887af9010e2f2dc34806789b | Unavailable | None listed |
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | bf8b3f34c37c162357138e7c0942723b8b94fed1 | Unavailable | None listed |
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | 76cd9398a0470257ab765bdf5f358a2af2e17934 | Unavailable | None listed |
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | 50750d86a2e5266aba0c295483b3397843198b11 | Unavailable | None listed |
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | 6dff77899b9e9fe5d854abda3a98ad04e7229ef7 | Unavailable | None listed |
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | f3f204541f280a6ecb04503a0d6794d93990ca43 | Unavailable | None listed |
| 4cb47a8644cc9eb8ec81190a50e79e6530d0297f | affected | git | b4bc94353050b1fa7b702bd4c6600710dd926cff | 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) |
|---|---|---|---|---|---|
| 5.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.9 | Unavailable | None listed |
| 5.10.259 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.210 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.176 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.143 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.93 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.35 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.12 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |