- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 88% 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: riscv: probes: save original sp in rethook trampoline Reading a word from the stack in a kretprobe crashes a risc-v kernel. $ cd /sys/kernel/tracing/ $ echo 'r n_tty_write $stack0' > dynamic_events $ echo 1 > events/kprobes/enable Unable to handle kernel paging request at virtual address 0000000200000128 ... [<ffffffff80016d16>] regs_get_kernel_stack_nth+0x26/0x38 [<ffffffff80177196>] process_fetch_insn+0x3ee/0x760 [<ffffffff80177836>] kretprobe_trace_func+0x116/0x1f0 [<ffffffff8017795a>] kretprobe_dispatcher+0x4a/0x58 [<ffffffff8013572e>] kretprobe_rethook_handler+0x5e/0x90 [<ffffffff80180838>] rethook_trampoline_handler+0x70/0x108 [<ffffffff8001ba32>] arch_rethook_trampoline_callback+0x12/0x1c [<ffffffff8001ba84>] arch_rethook_trampoline+0x48/0x94 [<ffffffff8067872a>] tty_write+0x1a/0x30 In regs_get_kernel_stack_nth, regs->sp contains an arbitrary value. arch_rethook_trampoline saves the registers from the probed function in a struct pt_regs. sp is not saved. Instead, sp is decremented for arch_rethook_trampoline's local stack. Fix this crash and save the original sp along with the other registers. Use a0 as a temporary register, it is overwritten anyway. [[email protected]: added Fixes tag; cc'ed stable]
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months 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)
- 0.21% · top 88% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected c22b0bcb1dd024cb9caad9230e3a387d8b061df5 – < d21109fe4a55247094f913773a334772907cd016
- affected c22b0bcb1dd024cb9caad9230e3a387d8b061df5 – < 5da5cf48a432e30ded8d58087854e5383a36eff1
- affected c22b0bcb1dd024cb9caad9230e3a387d8b061df5 – < c386e1c591d72eab58ee2e69105c8cbc70928857
- affected c22b0bcb1dd024cb9caad9230e3a387d8b061df5 – < 2faf0198168d2017cb528a79f76c560fda3b6e94
- affected c22b0bcb1dd024cb9caad9230e3a387d8b061df5 – < 91b4d76dd07f1a1f20f73dfebb42ba04ac911a56
- affected c22b0bcb1dd024cb9caad9230e3a387d8b061df5 – < bc7b086a45521a986a49045907f017e3e46c763e
- affected 5.12
- unaffected < 5.12
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/d21109fe4a55247094f913773a334772907cd016 (opens in a new tab)
- https://git.kernel.org/stable/c/5da5cf48a432e30ded8d58087854e5383a36eff1 (opens in a new tab)
- https://git.kernel.org/stable/c/c386e1c591d72eab58ee2e69105c8cbc70928857 (opens in a new tab)
- https://git.kernel.org/stable/c/2faf0198168d2017cb528a79f76c560fda3b6e94 (opens in a new tab)
- https://git.kernel.org/stable/c/91b4d76dd07f1a1f20f73dfebb42ba04ac911a56 (opens in a new tab)
- https://git.kernel.org/stable/c/bc7b086a45521a986a49045907f017e3e46c763e (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-2026-58986 (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-2026-72028)Record last updated .