CVE-2026-64375proc: protect ptrace_may_access() with exec_update_lock (FD links)
Updated under an hour ago ()
Does this affect you?
It affects Linux and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 778c1144771f0064b6f51bee865cceb0d996f2f9 before 6253dfee5afba536bb54fc6fe6c091c3758fafe1; 778c1144771f0064b6f51bee865cceb0d996f2f9 builds before 65bf0d2b6e914f1448d6a2fde193dcf60936a651; from 778c1144771f0064b6f51bee865cceb0d996f2f9 before de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf; 778c1144771f0064b6f51bee865cceb0d996f2f9 builds before 138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2; 778c1144771f0064b6f51bee865cceb0d996f2f9 builds before 83b17872e3166c295c599279fc9562ac3840c638; 778c1144771f0064b6f51bee865cceb0d996f2f9 builds before 497c6bae5167428596575f20af6613ff5671f383; from 778c1144771f0064b6f51bee865cceb0d996f2f9 before dfd1894cb64cbd8758b461ed713800fe73db4f82; from 778c1144771f0064b6f51bee865cceb0d996f2f9 before 6255da28d4bb5349fe18e84cb043ccd394eba75d | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.18 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.97; from 6.13 before 6.18.40; from 6.19 before 7.1.4 | NVD |
References
- https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1patch
- https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651patch
- https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aafpatch
- https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2patch
- https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638patch
- https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383patch
- https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82patch
- https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75dpatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlthird-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.