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CVE-2026-100075

Linux: RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.42%Chance of exploitation activity in the next 30 days, higher than 35% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in717ab4d0614e9446bf8e2de6229464499e4008d6Fixed versionCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 717ab4d0614e9446bf8e2de6229464499e4008d6LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters

When srpt_alloc_rw_ctxs() fails partway through a multi-buffer indirect descriptor, the unwind path destroys RDMA contexts but leaves stale n_rw_ctx and n_rdma values (and a dangling rw_ctxs pointer). Later sq_wr_avail accounting in srpt_queue_response() or srpt_write_pending() can then subtract the wrong number of send queue credits.

Reset the counters and clear rw_ctxs after freeing the heap allocation before returning an error.

Text from CVE List

Affected versions 18

  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before af00051dbc9f467d4840ec709680660a3f8990faCVE List
  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before 717ab4d0614e9446bf8e2de6229464499e4008d6CVE List
  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before f1f2252da52cdda912da9993f39f58783b01b38fCVE List
  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before f65f45dfa1e6e2eaa9e11c8b8ce8857799cb189dCVE List
  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before be1478849e1abb1e12dc12e14cdbf800cc6fa99aCVE List
  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before af073bd245180393bcb15d33d3990a6bdc32593aCVE List
  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before bd02d644bd19a2795c018635d273d91e45d2bb95CVE List
  • Linuxaffected: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 before b38f98e176050850f41bb6415f3a71400056623eCVE List
  • Linuxaffected: 4.7CVE List
  • Linuxunaffected: all versions before 4.7CVE List
  • Linuxunaffected: 5.10.270 through 5.10.*CVE List
  • Linuxunaffected: 5.15.221 through 5.15.*CVE List
  • Linuxunaffected: 6.1.188 through 6.1.*CVE List
  • Linuxunaffected: 6.6.157 through 6.6.*CVE List
  • Linuxunaffected: 6.12.110 through 6.12.*CVE List
  • Linuxunaffected: 6.18.52 through 6.18.*CVE List
  • Linuxunaffected: 7.2.6 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 8