CVE catalog

CVE-2026-86805

Severity: High · CVSS 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: Sep 22, 2026, 3:55:17 PM UTC
Updated: Sep 22, 2026, 4:18:06 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.10% · Oct 22, 2026

A time-of-check to time-of-use (TOCTOU) race condition in the dynamic loader (ld.so) of the GNU C Library (glibc) versions 2.14 through 2.44 allows a local attacker to escalate privileges. When expanding $ORIGIN in DT_RPATH for setuid/setgid (AT_SECURE) programs, glibc validates the lexically normalized search path against the trusted directories but then opens the raw, un-normalized path. On systems where the Linux fs.protected_hardlinks sysctl is disabled, a local attacker who hard-links such a program into an attacker-controlled directory and wins a race to replace an intermediate path component with a symbolic link can direct the loader outside the trusted directory, causing it to load an attacker-controlled shared object and execute arbitrary code with the elevated privileges of the program. Exploitation requires an installed setuid or setgid binary whose DT_RPATH uses $ORIGIN followed by ".." traversal that normalizes into a trusted directory, and the ability to hard-link that binary and win the race by swapping a path component for a symbolic link. Major Linux-based OS distributions ship with fs.protected_hardlinks enabled by default and mitigate the vulnerability.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	glibc	sid	`2.43-7`	fixed
Debian	glibc	forky	`2.43-7`	fixed
Debian	glibc	trixie	`2.41-12+deb13u4`	vulnerable
Debian	glibc	bookworm	`2.36-9+deb12u14`	vulnerable
Debian	glibc	bookworm-security	`2.36-9+deb12u7`	vulnerable
Ubuntu	eglibc	pro	`2.17-93ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu1`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.8`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.9`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.10`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.11`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.13`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.14`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm4`	vulnerable
Ubuntu	glibc	pro	`2.30-0ubuntu2`	vulnerable
Ubuntu	glibc	pro	`2.30-0ubuntu3`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu5`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu6`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu7`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.1`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.2`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.3`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.7`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.9`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.12`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.14`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.15`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.16`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.17`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.18`	vulnerable
Ubuntu	glibc	pro	`2.31-0ubuntu9.18+esm1`	vulnerable
Ubuntu	glibc	22.04	`2.34-0ubuntu3`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu1`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.1`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.3`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.4`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.5`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.6`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.7`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.8`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.9`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.10`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.11`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.12`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.13`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.14`	vulnerable
Ubuntu	glibc	22.04	`2.35-0ubuntu3.15`	vulnerable
Ubuntu	glibc	24.04	`2.38-1ubuntu6`	vulnerable
Ubuntu	glibc	24.04	`2.38-3ubuntu1`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu1`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu2`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu6`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.1`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.2`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.3`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.4`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.5`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.6`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.7`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.8`	vulnerable
Ubuntu	glibc	24.04	`2.39-0ubuntu8.9`	vulnerable
Ubuntu	glibc	26.04	`2.42-0ubuntu3`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu1`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu2`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu4`	vulnerable
Ubuntu	glibc	26.04	`2.42-2ubuntu5`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu1`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu2`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu2.3`	vulnerable
Ubuntu	glibc	26.04	`2.43-2ubuntu2.4`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	glibc	source	sid	`2.43-7`	not yet assigned	Not reported	[1148727]
Debian	glibc	source	forky	`2.43-7`	not yet assigned	Not reported	[1148727]
Debian	glibc	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1148727]
Debian	glibc	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1148727]

[Debian bug #1148727]

Notes

[trixie] glibc: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[glibc-doc]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[glibc-source]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dbg]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dev]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dev-i386]Affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-dev-x32]Affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-i386]Affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc6-x32]Affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-bin]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-dev-bin]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-devtools]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[libc-l10n]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[locales]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · all · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · all · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[locales-all]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
[nscd]Affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u14 · arm64 · bookworm
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Affected
  nvd · glibc · debian · bookworm; nvd · glibc · debian · 12

[Debian 13 (Trixie)]

[glibc-doc]Affected
Source package: [glibc]
Details (2)
- 2.41-12+deb13u3 · all · trixie
  Affected
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · all · trixie
  Affected
  nvd · glibc · debian · 13
[glibc-source]Affected
Source package: [glibc]
Details (2)
- 2.41-12+deb13u3 · all · trixie
  Affected
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · all · trixie
  Affected
  nvd · glibc · debian · 13
[libc6]Affected
Source package: [glibc]
Details (2)
- 2.41-12+deb13u3 · amd64 · trixie
  Affected
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · arm64 · trixie
  Affected
  nvd · glibc · debian · 13
[libc6-dbg]Affected
Source package: [glibc]
Details (2)
- 2.41-12+deb13u3 · amd64 · trixie
  Affected
  nvd · glibc · debian · 13
- 2.41-12+deb13u3 · arm64 · trixie
  Affected
  nvd · glibc · debian · 13

Next results

Observed: Oct 23, 2026, 8:36:15 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]