- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: don't touch shared zerocopy state in skb_tx_error() skb_tx_error() completes the zerocopy uarg and clears SKBFL_ALL_ZEROCOPY, and skb_zcopy_downgrade_managed() clears SKBFL_MANAGED_FRAG_REFS. Both live in skb_shinfo(), which every clone shares, while the caller only owns the reference it is about to drop. Through a clone it tells the producer its pages are free and drops SKBFL_SHARED_FRAG for an skb that is still in flight. Open vSwitch reaches this with a non-last OVS_ACTION_ATTR_RECIRC: clone_execute() sends a skb_clone() into ovs_dp_process_packet() while do_execute_actions() keeps forwarding the original, and skb_clone() does not privatise the frags here -- skb_orphan_frags() returns early on SKBFL_DONT_ORPHAN. A flow miss on the clone then strips the marker from the packet still being forwarded, and a later local ESP delivery decrypts in place over frags it does not own privately. Skip it for a cloned skb. Nothing is lost: skb_release_data() clears the zerocopy state once the last reference to the shared data goes.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < 6493165034bca14033bf49c9cec7b45e97a91497
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < b4452349dcf4d561e13be768d5d278de58248930
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < 363c4252ffc473a0203e91b83ede5519dfb8bd07
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < 6ec22afc82a3cae07ade0a6ec361ae2532128ff5
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < 15aa81b390d401abf4b8211042470e9e92e3b7fb
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < 288f9970670841044ab030104fa6b6ed159949d0
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < 0370da114a9bc044e248b85c6809d1b5e0c1f7f9
- affected 25121173f7b1e4ac3fc692df6e7b8c52ec36abba – < f66bdb1cc0fcd227a062378f8be0b5873aa5600a
- affected 3.8
- unaffected < 3.8
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/6493165034bca14033bf49c9cec7b45e97a91497 (opens in a new tab)
- https://git.kernel.org/stable/c/b4452349dcf4d561e13be768d5d278de58248930 (opens in a new tab)
- https://git.kernel.org/stable/c/363c4252ffc473a0203e91b83ede5519dfb8bd07 (opens in a new tab)
- https://git.kernel.org/stable/c/6ec22afc82a3cae07ade0a6ec361ae2532128ff5 (opens in a new tab)
- https://git.kernel.org/stable/c/15aa81b390d401abf4b8211042470e9e92e3b7fb (opens in a new tab)
- https://git.kernel.org/stable/c/288f9970670841044ab030104fa6b6ed159949d0 (opens in a new tab)
- https://git.kernel.org/stable/c/0370da114a9bc044e248b85c6809d1b5e0c1f7f9 (opens in a new tab)
- https://git.kernel.org/stable/c/f66bdb1cc0fcd227a062378f8be0b5873aa5600a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76300 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80977)Record last updated .