CVE-2024-26640: tcp: add sanity checks to rx zerocopy
Noroxi assessment
Priority: Monitor (action score 22/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 1b8adcc0e2c584fec778add7777fe28e20781e60, 577e4432f3ac810049cb7e6b71f4d96ec7c6e894, 718f446e60316bf606946f7f42367d691d21541e.
- Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.
- Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 1b8adcc0e2c584fec778add7777fe28e20781e60, 577e4432f3ac810049cb7e6b71f4d96ec7c6e894, 718f446e60316bf606946f7f42367d691d21541e or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: tcp: add sanity checks to rx zerocopy TCP rx zerocopy intent is to map pages initially allocated from NIC drivers, not pages owned by a fs. This patch adds to can_map_frag() these additional checks: - Page must not be a compound one. - page->mapping must be NULL. This fixes the panic reported by ZhangPeng. syzbot was able to loopback packets built with sendfile(), mapping pages owned by an ext4 file to TCP rx zerocopy. r3 = socket$inet_tcp(0x2, 0x1, 0x0) mmap(&(0x7f0000ff9000/0x4000)=nil, 0x4000, 0x0, 0x12, r3, 0x0) r4 = socket$inet_tcp(0x2, 0x1, 0x0) bind$inet(r4, &(0x7f0000000000)={0x2, 0x4e24, @multicast1}, 0x10) connect$inet(r4, &(0x7f00000006c0)={0x2, 0x4e24, @empty}, 0x10) r5 = openat$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0) fallocate(r5, 0x0, 0x0, 0x85b8) sendfile(r4, r5, 0x0, 0x8ba0) getsockopt$inet_tcp_TCP_ZEROCOPY_RECEIVE(r4, 0x6, 0x23, &(0x7f00000001c0)={&(0x7f0000ffb000/0x3000)=nil, 0x3000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, &(0x7f0000000440)=0x40) r6 = openat$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0)
- Published
- Mar 18, 2024
- Updated
- Aug 5, 2026
- EPSS
- 0.2% · 15th percentile
- CWE
- —
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 5.5
- CNA · Linux
- 7.8
- 2.3 point gap
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- linux linux kernel5.11 and later · before 5.15.149
- linux linux kernel5.16 and later · before 6.1.77
- linux linux kernel4.18 and later · before 5.10.210
- linux linux kernel6.7 and later · before 6.7.4
- linux linux kernel6.2 and later · before 6.6.16
- linux linux kernel6.8
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 4.18affected
- 93ab6cc69162775201587cc9da00d5016dc890e2 and later · before f48bf9a83b1666d934247cb58a9887d7b3127b6faffected · git
- 93ab6cc69162775201587cc9da00d5016dc890e2 and later · before 718f446e60316bf606946f7f42367d691d21541eaffected · git
- 93ab6cc69162775201587cc9da00d5016dc890e2 and later · before b383d4ea272fe5795877506dcce5aad1f6330e5eaffected · git
- 93ab6cc69162775201587cc9da00d5016dc890e2 and later · before d15cc0f66884ef2bed28c7ccbb11c102aa3a0760affected · git
- 93ab6cc69162775201587cc9da00d5016dc890e2 and later · before 1b8adcc0e2c584fec778add7777fe28e20781e60affected · git
- 93ab6cc69162775201587cc9da00d5016dc890e2 and later · before 577e4432f3ac810049cb7e6b71f4d96ec7c6e894affected · git
- before 4.18not affected · semver
- 5.10.210 and later · up to and including 5.10.*not affected · semver
- 5.15.149 and later · up to and including 5.15.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:9 | bpftool | before 7.3.0-427.42.1.el9_4 | 7.3.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-devel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-modules | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-devel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-devel-matched | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-modules | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-modules-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-64k-modules-extra | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-abi-stablelists | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-cross-headers | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-core | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-devel | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-devel-matched | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
| AlmaLinux:9 | kernel-debug-modules | before 5.14.0-427.42.1.el9_4 | 5.14.0-427.42.1.el9_4 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2024-26637Mar 18, 2024 · wifi: ath11k: rely on mac80211 debugfs handling for vif22Monitor
- ← EarlierCVE-2024-26638Mar 18, 2024 · nbd: always initialize struct msghdr completely17Monitor
- Later →CVE-2024-26641Mar 18, 2024 · ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 1b8adcc0e2c584fec778add7777fe28e20781e60 | Vendor (CNA) |
| Linux Linux | 577e4432f3ac810049cb7e6b71f4d96ec7c6e894 | Vendor (CNA) |
| Linux Linux | 718f446e60316bf606946f7f42367d691d21541e | Vendor (CNA) |
| Linux Linux | b383d4ea272fe5795877506dcce5aad1f6330e5e | Vendor (CNA) |
| Linux Linux | d15cc0f66884ef2bed28c7ccbb11c102aa3a0760 | Vendor (CNA) |
| Linux Linux | f48bf9a83b1666d934247cb58a9887d7b3127b6f | Vendor (CNA) |
| almalinux:bpftool | 7.3.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-core | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-core | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel-matched | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-core | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-extra | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel | 5.14.0-427.42.1.el9_4 · AlmaLinux:9 | Package registry (OSV) |
| debian:linux | 6.1.82-1 · Debian:12 | Package registry (OSV) |
| opensuse:dtb-aarch64 | 6.4.0-150600.23.25.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-64kb | 6.4.0-150600.23.25.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-azure | 6.4.0-150600.8.14.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-debug | 6.4.0-150600.23.25.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-default | 6.4.0-150600.23.25.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-default-base | 6.4.0-150600.23.25.1.150600.12.10.2 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-docs | 6.4.0-150600.23.25.2 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 6.4.0-150600.23.25.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-obs-build | 6.4.0-150600.23.25.2 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 6.4.0-150600.23.25.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-source-azure | 6.4.0-150600.8.14.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
+26
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-24-0494 · May 16, 2024(Linux Kernel Güncellemesi)
- TR-24-0205 · Mar 20, 2024(Linux Kernel Güncellemesi)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (6 more)Show less
- git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894
- git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e
- git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e
- git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760
- git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f
- lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.