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TI-2024-17741 Aliases CVE-2024-26870GHSA-49g6-x26j-85g3

NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102

Priority LOW 34Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 24 fixed, 3 without a fix

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

Summary

In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102 A call to listxattr() with a buffer size = 0 returns the actual size of the buffer needed for a subsequent call. When size > 0, nfs4_listxattr() does not return an error because either generic_listxattr() or nfs4_listxattr_nfs4_label() consumes exactly all the bytes then size is 0 when calling nfs4_listxattr_nfs4_user() which then triggers the following kernel BUG: [ 99.403778] kernel BUG at mm/usercopy.c:102! [ 99.404063] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP [ 99.408463] CPU: 0 PID: 3310 Comm: python3 Not tainted 6.6.0-61.fc40.aarch64 #1 [ 99.415827] Call trace: [ 99.415985] usercopy_abort+0x70/0xa0 [ 99.416227] __check_heap_object+0x134/0x158 [ 99.416505] check_heap_object+0x150/0x188 [ 99.416696] __check_object_size.part.0+0x78/0x168 [ 99.416886] __check_object_size+0x28/0x40 [ 99.417078] listxattr+0x8c/0x120 [ 99.417252] path_listxattr+0x78/0xe0 [ 99.417476] __arm64_sys_listxattr+0x28/0x40 [ 99.417723] invoke_syscall+0x78/0x100 [ 99.417929] el0_svc_common.constprop.0+0x48/0xf0 [ 99.418186] do_el0_svc+0x24/0x38 [ 99.418376] el0_svc+0x3c/0x110 [ 99.418554] el0t_64_sync_handler+0x120/0x130 [ 99.418788] el0t_64_sync+0x194/0x198 [ 99.418994] Code: aa0003e3 d000a3e0 91310000 97f49bdb (d4210000) Issue is reproduced when generic_listxattr() returns 'system.nfs4_acl', thus calling lisxattr() with size = 16 will trigger the bug. Add check on nfs4_listxattr() to return ERANGE error when it is called with size > 0 and the return value is greater than size.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00283 20th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.214, 5.15.153, 6.1.83 +4Red Hat: 8 advisoriesRed Hat: 24 fixed, 3 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
LinuxLinux5.9 and later5.10.214, 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2, 6.9Patch availableCNA
  • Linux VendorLinux Affected 5.9 and later Fixed in 5.10.214, 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2, 6.9 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.9 to before 5.10.214; 5.11 to before 5.15.153; 5.16 to before 6.1.83; 6.2 to before 6.6.23; 6.7 to before 6.7.11; 6.8 to before 6.8.2VulnerableLinux
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.9 to before 5.10.214; 5.11 to before 5.15.153; 5.16 to before 6.1.83; 6.2 to before 6.6.23; 6.7 to before 6.7.11; 6.8 to before 6.8.2 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.214, 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2, 6.9

Red Hat 8 advisories

  • RHSA-2024:9546 Released 2024-11-13 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.44.1.el9_4, libperf-5.14.0-427.44.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.44.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.44.1.el9_4, kernel-64k-devel-5.14.0-427.44.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.44.1.el9_4, kernel-5.14.0-427.44.1.el9_4, kernel-64k-5.14.0-427.44.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.44.1.el9_4, kernel-rt-core-5.14.0-427.44.1.el9_4, kernel-rt-debug-5.14.0-427.44.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.44.1.el9_4, kernel-rt-core-5.14.0-427.44.1.el9_4, kernel-rt-debug-5.14.0-427.44.1.el9_4 +11
  • RHSA-2024:9497 Released 2024-11-13 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.92.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.92.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.92.1.el9_2, kernel-64k-devel-5.14.0-284.92.1.el9_2 +9
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.92.1.el9_2, kernel-5.14.0-284.92.1.el9_2, kernel-64k-5.14.0-284.92.1.el9_2 +29
  • RHSA-2024:9498 Released 2024-11-13 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-core-5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-debug-5.14.0-284.92.1.rt14.377.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-core-5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-debug-5.14.0-284.92.1.rt14.377.el9_2 +11
Show 5 more Red Hat advisories
  • RHSA-2024:9315 Released 2024-11-12 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-cross-headers-5.14.0-503.11.1.el9_5, kernel-tools-libs-devel-5.14.0-503.11.1.el9_5, libperf-5.14.0-503.11.1.el9_5
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-503.11.1.el9_5, kernel-64k-debug-devel-matched-5.14.0-503.11.1.el9_5, kernel-64k-devel-5.14.0-503.11.1.el9_5 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.4.0-503.11.1.el9_5, kernel-5.14.0-503.11.1.el9_5, kernel-64k-5.14.0-503.11.1.el9_5 +30
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-503.11.1.el9_5, kernel-rt-core-5.14.0-503.11.1.el9_5, kernel-rt-debug-5.14.0-503.11.1.el9_5 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-503.11.1.el9_5, kernel-rt-core-5.14.0-503.11.1.el9_5, kernel-rt-debug-5.14.0-503.11.1.el9_5 +11
  • RHSA-2024:5255 Released 2024-08-13 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-tools-libs-devel-4.18.0-477.67.1.el8_8
    • Red Hat Enterprise Linux BaseOS EUS (v.8.8) bpftool-4.18.0-477.67.1.el8_8, kernel-4.18.0-477.67.1.el8_8, kernel-abi-stablelists-4.18.0-477.67.1.el8_8 +19
  • RHSA-2024:5101 Released 2024-08-08 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.16.1.el8_10, kernel-4.18.0-553.16.1.el8_10, kernel-abi-stablelists-4.18.0-553.16.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.16.1.el8_10
  • RHSA-2024:5102 Released 2024-08-08 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-4.18.0-553.16.1.rt7.357.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core-4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-4.18.0-553.16.1.rt7.357.el8_10 +7
  • RHSA-2024:5065 Released 2024-08-07 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.115.1.el8_6, kernel-4.18.0-372.115.1.el8_6, kernel-abi-stablelists-4.18.0-372.115.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.115.1.el8_6, kernel-4.18.0-372.115.1.el8_6, kernel-abi-stablelists-4.18.0-372.115.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.115.1.el8_6, kernel-4.18.0-372.115.1.el8_6, kernel-abi-stablelists-4.18.0-372.115.1.el8_6 +14

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2024:9315
Red Hat CodeReady Linux Builder EUS (v.8.8)Fixed RHSA-2024:5255
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:9497
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2024:9546
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:9315
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:9497
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2024:9546
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:5101
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:9315
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2024:5065
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2024:5065
Red Hat Enterprise Linux BaseOS EUS (v.8.8)Fixed RHSA-2024:5255
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:9497
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2024:9546
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2024:5065
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:5101
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2024:5102
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2024:5102
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2024:9315
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:9498
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2024:9546
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2024:9315
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:9498
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2024:9546
Not affected: 4 products
  • Red Hat CodeReady Linux Builder (v. 9)
  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-26870
  2. 2026-10-03 Alias added: GHSA-49g6-x26j-85g3

References

Patch 7

  • 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