CVE-2026-53212
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)
netfilter: nft_tunnel: fix use-after-free on object destroy
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_tunnel: fix use-after-free on object destroy nft_tunnel_obj_destroy() calls metadata_dst_free() which directly kfree()s the metadata_dst, ignoring the dst_entry refcount. Packets that took a reference via dst_hold() in nft_tunnel_obj_eval() and are still queued (e.g. in a netem qdisc) are left with a dangling pointer. When these packets are eventually dequeued, dst_release() operates on freed memory. Replace metadata_dst_free() with dst_release() so the metadata_dst is freed only after all references are dropped. The dst subsystem already handles metadata_dst cleanup in dst_destroy() when DST_METADATA is set.
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) |
|---|---|---|---|---|---|
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | 349df61526d2e39decc685d246202e3e284cfe05 | Unavailable | None listed |
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | 55b79b1ae42372012413ce0413181d26679b17ef | Unavailable | None listed |
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | 5e9ee18b27fde88cb6148202b33916c66693fe82 | Unavailable | None listed |
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | 8767fe4079affa74314d7eb3220e700150289842 | Unavailable | None listed |
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | fda6573a46ad24f35348e024905ee5bdf729797e | Unavailable | None listed |
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | 941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3 | Unavailable | None listed |
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | f9a0e4b61054cde89a2a77845293c726cc07cc43 | Unavailable | None listed |
| af308b94a2a4a5a27bec9028354c4df444a7c8ba | affected | git | c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a | 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) |
|---|---|---|---|---|---|
| 4.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.19 | 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 |
| 6.12.94 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.36 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.13 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |