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TI-2026-24234 Aliases CVE-2026-31677GHSA-25g2-2jj3-xvxx

crypto: af_alg - limit RX SG extraction by receive buffer budget

Priority LOW 24Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 10 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - limit RX SG extraction by receive buffer budget Make af_alg_get_rsgl() limit each RX scatterlist extraction to the remaining receive buffer budget. af_alg_get_rsgl() currently uses af_alg_readable() only as a gate before extracting data into the RX scatterlist. Limit each extraction to the remaining af_alg_rcvbuf(sk) budget so that receive-side accounting matches the amount of data attached to the request. If skcipher cannot obtain enough RX space for at least one chunk while more data remains to be processed, reject the recvmsg call instead of rounding the request length down to zero.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00156 4th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.191, 6.6.160, 6.12.83 +3Red Hat: 2 advisoriesRed Hat: 10 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.14 and later6.1.191, 6.6.160, 6.12.83, 6.18.24, 6.19.14, 7.0Patch availableCNA
  • Linux VendorLinux Affected 4.14 and later Fixed in 6.1.191, 6.6.160, 6.12.83, 6.18.24, 6.19.14, 7.0 Patch available CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.14 to before 6.12.83; 6.13 to before 6.18.24; 6.19 to before 6.19.14VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*7.0 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*7.0 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*7.0 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*7.0 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*7.0 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*7.0 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*7.0 rc7VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14 to before 6.12.83; 6.13 to before 6.18.24; 6.19 to before 6.19.14 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* Versions 7.0 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* Versions 7.0 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* Versions 7.0 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* Versions 7.0 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* Versions 7.0 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* Versions 7.0 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* Versions 7.0 rc7 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.83, 6.18.24, 6.19.14, 7.0

Red Hat 2 advisories

  • RHSA-2026:19225 Released 2026-05-19 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.5.3.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.5.3.el9_8, kernel-64k-devel-5.14.0-687.5.3.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.5.3.el9_8, kernel-64k-5.14.0-687.5.3.el9_8, kernel-64k-core-5.14.0-687.5.3.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.5.3.el9_8, libperf-5.14.0-687.5.3.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.5.3.el9_8, kernel-rt-64k-5.14.0-687.5.3.el9_8, kernel-rt-64k-core-5.14.0-687.5.3.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.5.3.el9_8, kernel-rt-core-5.14.0-687.5.3.el9_8, kernel-rt-debug-5.14.0-687.5.3.el9_8 +9
  • RHSA-2026:19074 Released 2026-05-19 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.7.3.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.7.3.el10_2, kernel-64k-devel-6.12.0-211.7.3.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.7.3.el10_2, kernel-64k-6.12.0-211.7.3.el10_2, kernel-64k-core-6.12.0-211.7.3.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.7.3.el10_2, libperf-6.12.0-211.7.3.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.7.3.el10_2, kernel-rt-64k-6.12.0-211.7.3.el10_2, kernel-rt-64k-core-6.12.0-211.7.3.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.7.3.el10_2, kernel-rt-core-6.12.0-211.7.3.el10_2, kernel-rt-debug-6.12.0-211.7.3.el10_2 +9

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:19074
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:19225
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:19074
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:19225
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:19074
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:19225
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:19074
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:19225
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:19074
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:19225
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-31677
  2. 2026-10-03 Alias added: GHSA-25g2-2jj3-xvxx
  3. 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@7e345de2e69475430af85e09210795d8eb8e719c · CNA
  4. 2026-10-21 1 new reference · CNA
  5. 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@960c56743988d8ce9ff9b5d770dbeb5f64823a23 · CNA
  6. 2026-10-30 1 new reference · CNA
  7. 2026-11-06 CISA SSVC decision points changed
  8. 2026-11-07 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 10) +7 · Red Hat
  9. 2026-11-07 CVSS score added · Red Hat

References

Patch 4

Other 2

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences