CVE-2026-98655perf: Require kernel access for text poke events
- —Not scoredno CVSS score yet
- 0.19%Exploitation in 30 daysEPSS · top 91% 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: perf: Require kernel access for text poke events Perf events with exclude_kernel=1 can be opened without kernel perf access. However, exclude_kernel does not suppress text-poke sideband records. Every PERF_RECORD_TEXT_POKE is marked PERF_RECORD_MISC_KERNEL and contains a raw kernel instruction address. An unprivileged task can therefore open and mmap a task-local software event with text_poke=1. Both opening a count-only tracepoint event and configuring UDP GRO for ESP-in-UDP cause updates to inline static calls; the observer receives the relocated addresses of the modified instructions. For a known kernel image, any such address reveals the runtime kernel text base despite KASLR. Call perf_allow_kernel() whenever attr.text_poke is set, regardless of exclude_kernel. Events that neither monitor kernel execution nor request text-poke records retain their existing permissions.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 12 days later
· 12 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < 4d8fc6290d14aa9e4c3b620fe3e5dc8ba3bea7e3
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < c30886396eb1c0e9fdc4296398dea0db0ab37610
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < 0e26d44b7c64b045adebcf5d614140f811f09752
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < 8c38cb055f6a9651198780e4e4d5283de4039f79
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < 8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < e506333d1b9f42f1e402acebf1283af3c44a3809
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < 677d0b51ac1a0db55d768c4c6399210b3de0795b
- affected e17d43b93e544f5016c0251d2074c15568d5d963 – < 357e8a77a501d96c9517f01f4a211eed5e9c9184
- affected 5.9
- unaffected < 5.9
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.56 – ≤ 6.18.*
- unaffected 7.2.10 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/4d8fc6290d14aa9e4c3b620fe3e5dc8ba3bea7e3 (opens in a new tab)
- https://git.kernel.org/stable/c/c30886396eb1c0e9fdc4296398dea0db0ab37610 (opens in a new tab)
- https://git.kernel.org/stable/c/0e26d44b7c64b045adebcf5d614140f811f09752 (opens in a new tab)
- https://git.kernel.org/stable/c/8c38cb055f6a9651198780e4e4d5283de4039f79 (opens in a new tab)
- https://git.kernel.org/stable/c/8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7 (opens in a new tab)
- https://git.kernel.org/stable/c/e506333d1b9f42f1e402acebf1283af3c44a3809 (opens in a new tab)
- https://git.kernel.org/stable/c/677d0b51ac1a0db55d768c4c6399210b3de0795b (opens in a new tab)
- https://git.kernel.org/stable/c/357e8a77a501d96c9517f01f4a211eed5e9c9184 (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-2026-103909 (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-2026-98655)Record last updated .