CVE-2026-80848
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)
xfrm: espintcp: fix UAF during close
In the Linux kernel, the following vulnerability has been resolved: xfrm: espintcp: fix UAF during close ZDI reported and analyzed a race condition during close for espintcp sockets: espintcp_close() frees emsg->skb via kfree_skb() without holding any socket lock. Concurrently, the xfrm_trans_reinject work queue invokes esp_output_tcp_finish() -> espintcp_push_skb() -> espintcp_push_msgs() -> skb_send_sock_locked(), which reads the same skb as a data source. Fix this by adding a synchronize_rcu() call after resetting sk_prot, since esp_output_tcp_finish() runs under RCU and won't use a socket with sk_prot == &tcp_prot. Simply taking the socket lock in espintcp_close() could lead to leaks, if esp_output_tcp_finish() re-adds an skb in the slot we just freed. After this, the existing barrier() is no longer 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) |
|---|---|---|---|---|---|
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | 29121c5e6591da527e8e36ddac7120dc527f574d | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | ed5d9102190c45fc70121c036b0626b740040b75 | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | 4bc0dfa28dca6fc0084203732695968049c44072 | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | ff8dd7a932f34409a56e1b91a1219340f17457e9 | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | 4b31a875693c480c611519faca46216514e3e052 | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | 24efebecf415ba264adba0f0491cec436463a14f | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | eb3bbf29c723fe75c0eb92be14f0ec92971fe272 | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | 54b41ad14da9a981131ab6e4d3f79321a503ea5d | Unavailable | None listed |
| e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 | affected | git | deb232e884877bf10b4ce2580909eedec986c284 | 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) |
|---|---|---|---|---|---|
| 5.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.6 | Unavailable | None listed |
| 5.10.269 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.220 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.187 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.156 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.108 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.49 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.13 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2.3 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |